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Korea → United StatesHS 850440Other power supplyTake care

Electrical machinery and equipment and parts thereof › Electrical transformers, static converters and inductors; parts thereof

Other power supply

HS 850440Korea → United States

Destination duty
0%
General
Federal VAT / GST
None
Clearance difficulty
Take care

1Overview

  • Destination duty: Free (General, same on all 5 lines) — A trade agreement with Korea is in force, but it gives no lower rate for this code — the basic / MFN rate applies.
  • Federal VAT / GST: None — The US has no federal VAT. State sales tax is not charged at import.
  • This code covers: Other power supply
  • Additional tariffs: about +12.5% — Section 301 forced-labor duty (Korea) (Re-verified 2026-09-15: no change.)
  • Regime to watch: US duty-free de minimis suspended for all countriesSince 2025-08-29 Executive Order 14324 has suspended duty-free de minimis entry for shipments from every country. Parcels are now dutiable and need an entry with HS classification and origin, which raises the difficulty of small consignments.federalregister.gov

Key points

  • De minimis is suspended indefinitely: non-postal modes since 2026-06-24, international mail since 2026-07-24. The US$800 duty-free entry no longer exists.
  • No federal VAT or GST. State sales or use tax is a separate matter handled after import, not at the border.
  • US$2,500 separates informal from formal entry. Mail shipments up to US$2,500 in HTSUS chapters 1-97 may use the new postal informal entry process, with duty due by the 7th day of the month following arrival.
  • The importer of record may self-file in ACE, but formal entries require a customs bond, and ocean cargo also requires an Importer Security Filing (ISF 10+2) at least 24 hours before loading.
  • The Section 122 surcharge ended on 2026-07-24, and a Section 301 forced-labour action covering 60 economies took effect the same day. Additional duties appear as HTSUS Chapter 99 lines, so check what is in force on your entry date.

Key points on the origin side

  • There is no export duty, but an export declaration is still required. Goods that are not drawback-eligible and are worth FOB KRW 2,000,000 or less can go through list clearance instead of a full declaration, and e-commerce and similar consignments worth FOB KRW 5,000,000 or less can use the simplified export declaration (Notice on Export and Re-export Clearance, article 55(1)8 and article 43(1)).
  • The loading deadline is 30 days from acceptance of the export declaration, extendable up to one year with cause.
  • The export permit is the evidence for VAT zero-rating and the basis for a drawback claim (VAT Act art. 21; Drawback Special Cases Act art. 14).
  • Strategic-goods status must be determined before export; if the item qualifies, an export licence from the Ministry of Trade, Industry and Energy through KOSTI is required.
  • An FTA certificate of origin is needed when the buyer claims preference at destination: KORUS is self-certified, the Korea-China FTA is authority-issued.

As of: 2026 HTS Rev.15 · Guidance as of: 2026-09

2Classification

HS6 names

  • ko정지형 변환기
  • enOther power supply
  • zh_hant其他電源供應器
  • zh_hans其他电源供应器

United States tariff lines

LineDescription
8504.40.40.00Speed drive controllers for electric motorsElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters
8504.40.60Suitable for physical incorporation into automatic data processing machines or units thereof of heading 8471Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62
8504.40.60.01With a power output not exceeding 50 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Suitable for physical incorporati…
8504.40.60.07With a power output exceeding 50 W but not exceeding 150 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Suitable for physical incorporati…
8504.40.60.12With a power output exceeding 150 W but not exceeding 500 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Suitable for physical incorporati…
8504.40.60.18OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Suitable for physical incorporati…
8504.40.70OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62
8504.40.70.01With a power output not exceeding 50 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Other
8504.40.70.07With a power output exceeding 50 W but not exceeding 150 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Other
8504.40.70.12With a power output exceeding 150 W but not exceeding 500 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Other
8504.40.70.18OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62 › Other
8504.40.85.00For telecommunication apparatusElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters
8504.40.95OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters
8504.40.95.10With a power output not exceeding 50 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Rectifiers and rectifying apparatus › Power supplies
8504.40.95.20With a power output exceeding 50 W but not exceeding 150 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Rectifiers and rectifying apparatus › Power supplies
8504.40.95.30With a power output exceeding 150 W but not exceeding 500 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Rectifiers and rectifying apparatus › Power supplies
8504.40.95.40OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Rectifiers and rectifying apparatus › Power supplies
8504.40.95.50OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Rectifiers and rectifying apparatus
8504.40.95.71Of a capacity not exceeding 200 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.73Of a capacity exceeding 200 W but not exceeding 650 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.75Of a capacity exceeding 650 W but not exceeding 20,000 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.77Of a capacity exceeding 20,000 W but not exceeding 125,000 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.78Of a capacity exceeding 125,000 W but not exceeding 1,000,000 WElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.79OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other › Inverters
8504.40.95.80OtherElectrical transformers, static converters (for example, rectifiers) and inductors; parts thereof › Static converters › Other
Korea export-side line (reference)
  • 8504401010자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504401090기타
  • 8504402011자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504402019기타
  • 8504402020전기차(하이브리드형을 포함한다) 구동 모터용의 것
  • 8504402091자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504402099기타
  • 8504403010자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504403090기타
  • 8504404010자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504404090기타
  • 8504405010자동자료처리기계와 그 단위기기(제8471호, 제8443.31호, 제8443.32호, 제8528.42호, 제8528.52호, 제8528.62호)의 것 및 전기통신용 기기의 것
  • 8504405090기타
  • 8504409011자동자료처리기계의 것
  • 8504409019기타
  • 8504409091전기통신용 기기의 것
  • 8504409099기타

Top 3 United States rulings

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As of: 2026 HTS Rev.15

3Duty & tax

A trade agreement with Korea is in force, but it gives no lower rate for this code — the basic / MFN rate applies.

LineDescriptionGeneralSpecialColumn 2
8504.40.40.00Speed drive controllers for electric motorsFree—35%
8504.40.60Suitable for physical incorporation into automatic data processing machines or units thereof of heading 8471Free—35%
8504.40.60.01With a power output not exceeding 50 W———
8504.40.60.07With a power output exceeding 50 W but not exceeding 150 W———
8504.40.60.12With a power output exceeding 150 W but not exceeding 500 W———
8504.40.60.18Other———
8504.40.70OtherFree—35%
8504.40.70.01With a power output not exceeding 50 W———
8504.40.70.07With a power output exceeding 50 W but not exceeding 150 W———
8504.40.70.12With a power output exceeding 150 W but not exceeding 500 W———
8504.40.70.18Other———
8504.40.85.00For telecommunication apparatusFree—35%
8504.40.95OtherFree—35%
8504.40.95.10With a power output not exceeding 50 W———
8504.40.95.20With a power output exceeding 50 W but not exceeding 150 W———
8504.40.95.30With a power output exceeding 150 W but not exceeding 500 W———
8504.40.95.40Other———
8504.40.95.50Other———
8504.40.95.71Of a capacity not exceeding 200 W———
8504.40.95.73Of a capacity exceeding 200 W but not exceeding 650 W———
8504.40.95.75Of a capacity exceeding 650 W but not exceeding 20,000 W———
8504.40.95.77Of a capacity exceeding 20,000 W but not exceeding 125,000 W———
8504.40.95.78Of a capacity exceeding 125,000 W but not exceeding 1,000,000 W———
8504.40.95.79Other———
8504.40.95.80Other———

Chapter 99 additional duties

about +12.5%

Layers charged on top of the HTS rate above when the goods enter the US. Each layer is shown with its status, as-of date and source.

MeasureAddsCh.99 lineStatus · as of · source
Section 301 forced-labor duty (Korea) (Re-verified 2026-09-15: no change.)charged so the Column 1 rate and this duty together reach 12.5% — 0% + 12.5%.+12.5%9903.05.70, 9903.05.71in forcecourt challenge pendingAs of: 2026-09-15USTR notice of action, 91 FR (2026-15181), 28 July 2026; CBP CSMS #69326983
Note - KORUS and the forced-labor dutycheck this point before relying on the figure.—not in total9903.05.70, 9903.05.71in forceAs of: 2026-09-09USTR final action FRN, 23 July 2026; CBP CSMS #69326983 (net-of-MFN wording, re-read 2026-09-09)
IEEPA reciprocal tariff (struck down)no longer collected (as of 2026-09-09). Shown because material published before that date still quotes it.—not in total9903.01, 9903.02struck downcourt challenge pendingAs of: 2026-09-09Learning Resources, Inc. v. Trump, No. 24-1287 (U.S. 20 Feb 2026)
Section 122 balance-of-payments surcharge (expired)no longer collected (as of 2026-07-24). Shown because material published before that date still quotes it.—not in total—expiredcourt challenge pendingAs of: 2026-07-24Section 122 surcharge: imposed 24 Feb 2026, CIT ruling 7 May 2026, expired 24 July 2026
Additional totalabout +12.5%

Caveats

  • These layers are defined at the 8- or 10-digit HTS line. An HS6 code (850440) can only give the general picture.
  • At least one of these duties is being challenged in court. It is being collected today, but that can change.
  • A KORUS preference does not remove the Section 301 forced-labor duty: CBP measures the 12.5 % against the Column 1 general rate, and there is no KORUS carve-out of the kind USMCA and CAFTA-DR goods have.
  • The US$800 de minimis exemption is suspended, so low-value parcels are dutiable too; statutory repeal follows on 2027-07-01.
  • Duty is not the whole bill: MPF and (for ocean freight) HMF apply on top, and are not included here.
  • Information only, as of 2026-09-15. The HTSUS Chapter 99 notes and CBP CSMS guidance in force on the entry date control — verify with CBP or a licensed customs broker.
De minimis status

US $800 de minimis exemption

Suspended for all countries from 2025-08-29 and made indefinite by CBP interim final rules of 2026-06-24 (non-postal immediately, international mail from 2026-07-24). On 2026-08-13 the Court of International Trade rejected a challenge to the suspension, so it now stands on firmer ground. Statutory repeal follows on 2027-07-01 under the One Big Beautiful Bill Act, and as at the 2026-09-09 re-check no legislation has moved that date. The $100 gift and $200 accompanied-articles exemptions survive. Goods carrying a Chapter 99 duty cannot use the postal informal-entry route.

Threshold:
US$800
Suspended:
2025-08-29
Statutory repeal:
2027-07-01
CBP interim final rules, 91 FR (2026-12670 / 2026-12669), 24 June 2026

Information, not advice. US additional duties change often and are under litigation. What you actually pay is set by the HTSUS Chapter 99 notes and CBP CSMS guidance in force on the entry date — verify with CBP or a licensed broker.

As of: 2026-09-15

  • · The United States has no federal value-added or goods-and-services tax. Customs collects duty and fees only.
  • · Merchandise processing fee: 0.3464% of the entered value on formal entries, with a minimum and maximum re-indexed to inflation each fiscal year. For FY2026 (through 2026-09-30) the range is US$33.58 to US$651.50; for FY2027 (from 2026-10-01) it is US$34.58 to US$670.86. Informal entries pay a flat amount instead — US$2.77, 8.30 or 12.45 in FY2027.
  • · Harbor maintenance fee: 0.125% of the value on cargo arriving by vessel.
  • · State sales or use tax may apply to the onward sale or use of the goods and is administered by state revenue departments, not by CBP.
  • · Chapter 99 additional duties are added to the ordinary rate. As of 2026-09 that means Section 232 measures and the Section 301 forced-labour action effective 2026-07-24; the Section 122 surcharge ended on 2026-07-24. Verify what applies on the entry date.

Landed-cost estimate

Duty rate used
0%
Customs value
—
Duty
—
Additional duty (Ch.99) (12.5%)
—
Federal VAT / GST
—
Estimated total
—

A rough estimate. The real amount depends on valuation, classification and origin determination.

As of: 2026 HTS Rev.15

4Requirements

  • chapterFCC

    Electrical machinery/equipment incl. radiofrequency devices - FCC equipment authorization (47 CFR Part 2 Subpart K). NOTE: FCC states there is NO direct HTS-to-FCC mapping; Form 740 eliminated 2017-11-02. Broad heuristic - RF-device subset only.

    Confidence:
    chapter-heuristic
    fcc.gov

CBP does not publish a complete per-HS PGA flag file, so this is mapped with a chapter/heading heuristic.

Agencies involved

  • U.S. Customs and Border Protection (CBP)Clears imports, assesses duty and fees, and enforces other agencies' requirements at the bordercbp.gov
  • U.S. International Trade CommissionPublishes the Harmonized Tariff Schedule of the United States, including the Chapter 99 additional-duty provisionshts.usitc.gov
  • U.S. Food and Drug Administration (FDA)Food, drugs, medical devices, cosmetics; Prior Notice and MoCRA registration and listingfda.gov
  • USDA Animal and Plant Health Inspection Service (APHIS)Plant and animal products, permits and phytosanitary requirementsaphis.usda.gov
  • Federal Communications Commission (FCC)Radio-frequency devices and equipment authorisationfcc.gov
  • Consumer Product Safety Commission (CPSC)Consumer products and children's product certificationcpsc.gov

As of: 2026-08-27

5Documents

Korea export documents

  • Export declaration (수출신고서)
    Issued by:
    Exporter or customs broker, filed in UNI-PASS
    When:
    Before loading

    Carries the HS code, quantity, value, terms of sale, origin and whether drawback will be claimed.

    Official page
  • Export declaration certificate (수출신고필증)
    Issued by:
    Customs
    When:
    Issued when the declaration is accepted

    Used for zero-rated VAT, duty drawback claims, trade finance and insurance.

    Official page
  • Commercial invoice
    Issued by:
    Exporter
    When:
    With the shipping documents

    The destination customs authority uses it to set the customs value, so description, quantity, unit price, terms and origin must be accurate.

    Official page
  • Packing list
    Issued by:
    Exporter
    When:
    With the shipping documents

    Carton-level contents, weights, dimensions and marks.

    Official page
  • Bill of lading or air waybill
    Issued by:
    Carrier or freight forwarder
    When:
    Issued after loading

    Used for payment, including under a letter of credit, and for the buyer to take delivery.

    Official page
  • FTA certificate of origin
    Issued by:
    Customs, the Korea Chamber of Commerce and Industry, or the exporter under self-certification
    When:
    Before the buyer claims preference

    KORUS is self-certified with no prescribed form; the Korea-China FTA is authority-issued; RCEP follows the mechanism in the agreement. There is no agreement with Taiwan.

    Official page
  • Strategic goods determination or export licence
    Issued by:
    Korea Strategic Trade Institute (KOSTI), Ministry of Trade, Industry and Energy
    When:
    Before exporting the item concerned

    Dual-use items go through self-classification or an expert determination, and an export licence where one is required.

    Official page
  • Health or quarantine certificate for export
    Issued by:
    MFDS, Animal and Plant Quarantine Agency and others
    When:
    When the destination requires it

    For example a health certificate for exported food, a phytosanitary certificate, or an animal quarantine certificate. Food exported to mainland China additionally requires GACC overseas manufacturer registration.

    Official page
  • Duty drawback claim documents
    Issued by:
    Exporter
    When:
    After the export is performed

    Depending on whether the fixed-rate or the individual method is used, import declaration certificates and basic raw material tax payment certificates are needed.

    Official page

United States import documents

  • CBP Form 3461, Entry/Immediate Delivery
    Issued by:
    U.S. Customs and Border Protection
    When:
    At or before arrival, filed electronically in ACE

    The release document. It may generally be filed up to five days before arrival.

    Official page
  • CBP Form 7501, Entry Summary
    Issued by:
    U.S. Customs and Border Protection
    When:
    Within 10 working days of release

    Carries the HTSUS classification, value and duty calculation. Duty may be paid entry by entry or on a periodic monthly statement.

    Official page
  • Commercial invoice
    Issued by:
    Seller or exporter
    When:
    With the entry

    Should identify buyer and seller, describe the goods, and state quantity, unit and total price, currency, terms of sale and country of origin.

    Official page
  • Packing list
    Issued by:
    Seller or exporter
    When:
    With the entry

    Carton-level contents, weights and marks, used during examination.

    Official page
  • Bill of lading or air waybill
    Issued by:
    Carrier or freight forwarder
    When:
    Issued at loading

    Evidence of the contract of carriage and of the right to take delivery.

    Official page
  • Importer Security Filing (ISF 10+2)
    Issued by:
    Importer or its agent
    When:
    At least 24 hours before the cargo is loaded onto the vessel

    Ocean cargo only. It does not apply to air, truck or rail shipments.

    Official page
  • Customs bond, single transaction or continuous
    Issued by:
    Surety licensed by the U.S. Treasury
    When:
    In place before the entry is filed

    Required for formal entries and for the new postal informal entry process.

    Official page
  • Free trade agreement claim of origin
    Issued by:
    Exporter, producer or importer
    When:
    Held at the time the claim is made

    For Korean-origin goods, KORUS uses self-certification with no prescribed form; the claim is made on the entry using the special program indicator KR. Taiwan and mainland China have no free trade agreement with the United States.

    Official page
  • Partner government agency data
    Issued by:
    FDA, USDA, FCC, CPSC, EPA and others
    When:
    With the entry

    Examples: FDA Prior Notice for food, cosmetic facility registration and product listing under MoCRA with a named U.S. responsible person, FCC declarations for radio-frequency devices, CPSC certificates for children's products.

    Official page

6Procedure

  1. Pre-loading filingsThe importer or its agent files the Importer Security Filing (ISF 10+2) at least 24 hours before the cargo is loaded onto the vessel, and the carrier files its advance cargo manifest on the same 24-hour timeline.
  2. Entry filingCBP Form 3461 is filed in ACE, generally up to five days before arrival. Entry must be made within 15 calendar days of arrival, otherwise the goods are moved to a General Order warehouse.
  3. Review, examination and agency holdsCBP may select the shipment for document review, X-ray or a physical examination, and a partner government agency such as FDA, USDA or CPSC may place its own hold.
  4. ReleaseOnce CBP and any agency holds are cleared, the goods are released and may leave the port.
  5. Entry summary and paymentCBP Form 7501 is filed within 10 working days of release with duty, merchandise processing fee and harbor maintenance fee, paid entry by entry or on a periodic monthly statement.
  6. LiquidationCBP fixes the final duty at liquidation, normally within 314 days of entry. Post-summary corrections and protests have their own separate deadlines.
  1. Advance manifestThe air carrier transmits its advance cargo information before arrival. The Importer Security Filing does not apply to air cargo.
  2. Entry filingCBP Form 3461 is filed in ACE, commonly before the aircraft lands, so that release can follow shortly after arrival.
  3. Review and agency holdsCBP and partner government agencies review the entry and may examine the shipment at the airport cargo facility.
  4. Release and deliveryAfter release the goods leave the bonded air cargo facility.
  5. Entry summary and liquidationCBP Form 7501 and duty follow within 10 working days of release, then liquidation as for ocean cargo.
  1. Advance dataThe express consignment operator or the postal operator transmits shipment data to CBP before arrival.
  2. EntrySince 2026-06-24 low-value goods can no longer be released from the manifest. Express shipments are entered as informal entries, normally Entry Type 11, and anything above US$2,500 requires a formal entry.
  3. Mail shipmentsSince 2026-07-24 mail shipments valued at US$2,500 or less and classifiable in HTSUS chapters 1 to 97 may use the postal informal entry process, filed by a licensed customs broker or by the owner or purchaser, with a basic importation and entry bond in place.
  4. Duty assessment and paymentDuty and fees are calculated on the declared value. Express operators normally advance the duty and bill the buyer; under the postal process duty is due no later than the 7th day of the month following the package's arrival.
  5. Agency screening and deliveryFood, cosmetics, drugs, radio devices and children's products still require their agency data, and goods subject to quota, antidumping or countervailing duties, Chapter 98 or 99 duties, or a free trade agreement claim are excluded from the postal informal process.
  1. Declaration on arrivalTravellers declare everything acquired abroad, on CBP Form 6059B or its electronic equivalent, and answer the CBP officer's questions at the port of entry.
  2. Personal exemptionsReturning U.S. residents generally have a personal exemption of US$800. Non-residents' accompanied personal and household articles of US$200 or less remain exempt under 19 U.S.C. 1321(a)(2)(B).
  3. Commercial merchandiseGoods carried for resale are not covered by a personal exemption. They require an informal or formal entry like any other import, and partner government agency rules still apply.
  4. PaymentDuty on declared goods above the exemption is paid at the port of entry before the traveller leaves the customs area.
Show Korea export-side steps
  1. Pre-shipment reviewFix the HS code and determine whether the item is a strategic good. Destination-side registrations, such as GACC registration for food going to mainland China or MoCRA registration for cosmetics going to the United States, must be completed before shipment.
  2. Export declarationThe exporter or a customs broker files the declaration in UNI-PASS. If drawback will be claimed, the relevant fields are completed at this point.
  3. Review, examination and acceptanceCustoms reviews the documents, examines the goods where necessary, accepts the declaration and issues the export declaration certificate.
  4. Delivery and loadingThe container is delivered to the CY or CFS and loaded. Bonded transport is used where the goods have to move to another customs district.
  5. Loading deadlineLoading must be completed within 30 days of acceptance. If a delay is expected, an extension of the loading deadline is requested.
  6. Documents and follow-upCollect the bill of lading for payment, then file the zero-rated VAT return and the duty drawback claim.

7Difficulty

Take care

Score: 0.56

A signal derived from public data, not advice.

Why this reading

  • regime[DOE] DOE external power supply standards + FCCExternal power supplies must meet DOE Level VI efficiency and be certified in the DOE database; switching supplies also fall under FCC Part 15.energy.gov2026-09-07
  • requirement1 destination import requirement(s) found: Electrical machinery/equipment incl. radiofrequency devices - FCC equipment authorization (47 CFR Part 2 Subpart K). NOTE: FCC states there is NO direct HTS-to-FCC mapping; Form 740 eliminated 2017-11fcc.gov2026-09-07
  • ambiguityClassification is contested — 502 US rulings split across 44 subheadings.rulings.cbp.gov2026-09-07
  • timingSince 2025-08-29 Executive Order 14324 has suspended duty-free de minimis entry for shipments from every country. Parcels are now dutiable and need an entry with HS classification and origin, which raises the difficulty of small consignments.federalregister.gov2026-09-07

Components

Import requirements0.34Electrical machinery/equipment incl. radiofrequency devices - FCC equipment authorization (47 CFR Part 2 Subpart K). NOTE: FCC states there is NO direct HTS-to-FCC mapping; Form 740 eliminated 2017-11 fcc.govCBP publishes no complete per-HS PGA flag file, so a chapter/heading heuristic map is used (confidence=chapter-heuristic). customs_v0.sqlite:us_requirements
Classification ambiguity0.86US rulings: 502, spread over 44 subheadings rulings.cbp.govUS CROSS: 502 rulings, 44% of them decided on more than one line · 149 other HS6 codes examined in the same cases rulings.cbp.gov
Regulatory regime0.50DOE external power supply standards + FCC energy.gov
Korea origin-side note: Korea’s customs-verified requirement list is import-side only; export controls (Foreign Trade Act, strategic items) must be checked separately. unipass.customs.go.kr

As of: 2026-09-07

8Cases

Rulings held:Korea 272United States 502Taiwan 84China —

Rulings from the destination authority come first, newest first. A similar case does not by itself decide the classification.

United States rulings (destination)

Showing the 10 most recent of 502 held

Show 5 more

Korea rulings (origin)

Showing the 10 most recent of 272 held

  • 관세평가분류원무선충전 무드등 시계 ; WDS100ㅇ 무선 충전기, 디지털 시계(시간표시, 알람 및 스누즈 설정), LED 조명(밝기 3단계 조절가능) 이 결합된 다기능 전기기기 - 크기(㎜) : 가로 142 × 세로 120 × 높이 161, 중량 : 360g - 입력전압 : 5V 2A, 9V 3A - 유선충전 : 5W, 7.5W, 10W, 15W ㅇ 기능별...Decided line: 8504403010Date: 2026-04-23Reference: CLIP-0072026001509
  • 관세평가분류원GENERATOR/7B TANK AND INV-10 INVERTER; HDG-07B10T2- 치과용 X-ray 촬영기기(Smart Plus)1)의 로테이터 유닛2)에 장착되는 엑스선 ①모노블럭 인버터보드와 ②모노블럭 본체를 함께 제시 1) X선을 이용하여 환자의 구강 및 턱 구조를 3차원 영상으로 획득하는 의료 영상 장비 2) X선을 발생시키고, 360° 회전하면서 환자에게 투사하여 X선 사진을 ...Decided line: 8504402099Date: 2026-04-10Reference: CLIP-0072026001607
  • 관세평가분류원AC MOTOR DRIVE; VFD5A5MS43ANSAA;- 전면 키패드가 내장된 모터 인버터로, 키패드 조작 또는 상위제어기의 제어에 따라 정해진 AC 전원을 DC로 정류한 후 다시 원하는 주파수와 전압의 AC로 변환하여 모터로 출력하는 기기 - (용도) AC 모터의 속도 및 토크를 제어 - 주요 구성요소 ① (디지털 키패드*) 모터 정격 주파수‧전류‧전압 등 파...Decided line: 8504409099Date: 2025-10-24Reference: CLIP-0072025004677
  • 관세평가분류원WIRELESS DEVICE CHARGING SYSTEM; WC-MP01;- 차량 내부 운전석 옆 Center console에 장착되는 전자기 유도 방식의 스마트폰 무선 충전기(적용 차량 : 팰리세이드 등) - 팰리세이드 차량 매뉴얼상 휴대폰 무선충전 시스템으로 설명 * 사이즈 : 88.2 x 138.4 x 25.6 ㎜ / 사양 : 10W - 구성 요소 - 무선 충전 원리 : 송신...Decided line: 8504403010Date: 2025-09-10Reference: CLIP-0072025004086
  • 관세평가분류원WIRELESS DEVICE CHARGING SYSTEM; WC-MP01N;- 차량 내부 운전석 옆 Center console에 장착되는 전자기 유도 방식의 스마트폰 무선 충전기(적용 차량 : 팰리세이드 등) - 팰리세이드 차량 매뉴얼상 휴대폰 무선충전 시스템으로 설명 * 사이즈 : 88.2 x 138.4 x 25.6 ㎜ / 사양 : 10W - 구성 요소 - 무선 충전 원리 : 송신...Decided line: 8504403010Date: 2025-09-10Reference: CLIP-0072025004087
Show 5 more
  • 관세평가분류원POWER REGENERATIVE UNIT; REG150A43A-21; CN;- 전력회생장치로 산업용 인버터 시스템에서 발생하는 회생에너지를 전력으로 변환(DC→AC)하여 전력망에 공급함으로써 에너지 절감 - 규격 : 130×370×190mm, 7.5kg - 용도 : 엘리베이터, 크레인 등 회생에너지가 발생하는 산업장비 - 구성요소 및 기능(렌즈 미장착) ① AC 전원(Main Pow...Decided line: 8504402099Date: 2025-05-29Reference: CLIP-0072025002264
  • 관세평가분류원고압발생기; FY-EPHGAQ08외; JP;- 터널 환기 시스템에 설치된 전기집진기에 고전압을 공급하는 고압발생 장치로서 주반, 부반로 구성됨 - 기능 및 용도 : 전기집진기(Electrostatic Precipitator)에서 방전전기장이 생성될 수 있도록 교류전기(AC)를 고전압의 직류전기(DC)*로 변환시켜 공급해 주는 기능 * 입력 전압 : A...Decided line: 8504401090Date: 2025-05-29Reference: CLIP-0072025002299
  • 관세평가분류원CNR SLC200; SLC200- 가로등에 설치되어, 제어기의 신호에 따라 전압값을 변환하여 가로등 LED에 공급함으로써 LED의 ON/OFF 및 밝기를 조절하는 기기 (규격) 크기 94×69.5×40㎜, 사용전압 12~60 VDC - 내부구조 및 상세 설명 ① RF 안테나(900㎒ 대역) : 제어기(서버, 게이트웨이)와 RF 신호 송수신...Decided line: 8504409099Date: 2024-12-24Reference: CLIP-0072024004875
  • 관세평가분류원VEHICLE TO LOAD CONVERTER; V2LC;- 전기자동차 내에 장착되어 고전압 배터리로부터 입력받은 DC 전원을 DC로 변환 후 AC 전원을 생성하여 차량 외부로 공급하는 전력 변환 장치 - 규격: L371×W171×H65.9㎜, 6.35㎏ - 주요 구성요소 및 기능 · LLC Converter: DC→AC→DC로 변환하는 절연형 컨버터 · Inver...Decided line: 8504402099Date: 2024-10-11Reference: CLIP-0072024003552
  • 관세평가분류원INTEGRATED CHARGING CONTROL UNIT; ICCU;- 전기자동차에 장착되는 통합 전력 변환 모듈 - 규격: 389×273×112㎜, 12㎏ - 주요 구성요소 ① 제어 보드: CAN 통신, MCU, 전원 반도체, FFC, 증폭기 등 ② 파워 보드: Transfomer(AC→DC), 변압기(DC→DC), 릴레이, 각종 스위칭 소자 등 ③ 필터 보드: 노이즈 제거...Decided line: 8504403090Date: 2024-10-11Reference: CLIP-0072024003551
Show rulings from other countries (15)
  • TW供自動資料處理機及其附屬單元與通訊器具用之靜電式變流器貨品名稱：電源適配器 POWER ADAPTOR 型號：TPN-DA18 規格：輸入：100-240VAC 50-60Hz 1.7A 輸出：19.5Vdc, 4.62A,90WDecided line: 85044020003Date: 2025Reference: 114AA0156
  • TW其他靜電式變流器貨品名稱:Inverter模組 型號:I230-1200 規格:輸出功率1200W/ 1250VA、輸入電壓40-58.5VDC、5種電壓輸出(200VAC、208VAC、220VAC、230VAC、240VAC)、輸出頻率50-60HzDecided line: 85044099900Date: 2025Reference: 114CA0090
  • TW變頻器品名: Variable Speed Drive(冷板式變頻器/coldplate drive) 型號: ACS280 規格: 208-240V, 380-480V/0.37-15kW (操作電壓/容量)Decided line: 85044099107Date: 2024Reference: 113CA0185
  • TW變頻器Low Voltage Cabinet Drive低壓驅動原裝盤 型號: ACS880-07C 規格: 380-500V/45-710kW (操作電壓/容量)Decided line: 85044099107Date: 2024Reference: 113CA0125
  • TW其他靜電式變流器貨品名稱：通道V掛電池快速充電器 型號：S-3822SDecided line: 85044099900Date: 2022Reference: 111CA0248
  • TW其他靜電式變流器行動電源存取裝置/BC-COMB-01/V1.0 供電AC:110V、50～60HZ、1.9A，功率100W max 每槽輸出電壓5V/2A 7槽口 尺寸長285*寬219.95*高247 (單位mm)Decided line: 85044099900Date: 2021Reference: 110BA0066
  • TW其他靜電式變流器貨品名稱：4顆電池充電座 型號：CH-BT2-4 規格：輸入電源12V/4.16A maxDecided line: 85044099900Date: 2020Reference: 109CA0244
  • TW其他靜電式變流器貨品名稱：單顆電池充電座 型號：CH-BT2 規格：輸入電源12V/4.16A maxDecided line: 85044099900Date: 2020Reference: 109CA0243
  • TW變頻器貨品名稱：DC Inverter Driver Module 型號：MK10455-JS1V7A 規格：Rated AC Input 200-240V/50/60Hz(±20%)、Rate DC Input +5/+15/+3.3V(±10%)、最大輸出功率 10kW、工作頻率 10-120HzDecided line: 85044099107Date: 2020Reference: 109CA0210
  • TW變頻器貨品名稱：DC Inverter Driver Module 型號：MK10555 規格：Rated AC Input 220-240V/50/60Hz(±20%)、Rate DC Input +5/+15/+19V(±10%)、最大輸出功率 15.5kW、工作頻率 30-120HzDecided line: 85044099107Date: 2020Reference: 109CA0211
  • TW其他不斷電式電源供應器，容量未超過１０仟伏安者備用電源模組 Power Backup Assembly 型號：BU1002SW 1.輸入電壓(四種模式) 200/220/230/240 VAC 2.輸出電壓(四種模式) 200V mode AC200V ±3%、220V mode AC220V ±3%、230V mode AC230V ±3%、240V mode AC240V ±3% 3.輸出功率 1000VA/700WDecided line: 85044092006Date: 2020Reference: 109AA0389
  • TW其他切換式電源供應器Power Supply Model No.: MC110-29V1.8A A (item No. 501709) 規格:input 100-240V~50/60Hz,1.2A ,: output: DC 29V 1.8ADecided line: 85044091007Date: 2020Reference: 109BA0107
  • TW供自動資料處理機及其附屬單元與通訊器具用之靜電式變流器Flexi Power Module Type-3 - FMCA (Flexi 3U Mounting Covers Front/Back/2PC) - FPRB (Flexi Power Rectifier Controller/1PC) - Rectifier AA27530L 48/3kw/2PC - FPBC (Flexi Power Battery 2C FPBC 30Ah/1PDecided line: 85044020003Date: 2020Reference: 109CA0066
  • TW其他靜電式變流器貨品名稱： Nintendo USB AC 適配器 型號：CLV-003 規格：Input：AC 100-240V、Output：DC 5.0V/1.5A、USB Type-ADecided line: 85044099900Date: 2020Reference: 109CA0059
  • TW其他靜電式變流器交流變交流變流器 (AC to AC Converter) ADF-33300T，容量：300kVA 電壓：220/380V to 5-300VDecided line: 85044099900Date: 2020Reference: 109AA0097

Sources: Federal Register: Indefinite Suspension of the De Minimis Exemption for Merchandise Arriving Through All Modes Other Than the International Postal Network · Federal Register: Indefinite Suspension of the De Minimis Exemption for Mail Shipments and New Postal Informal Entry Process · Federal Register: Notice of Implementation of Executive Order 14324, Suspending Duty-Free De Minimis Treatment for All Countries · CBP Form 7501, Entry Summary (revision 02/26) · CBP: Importer Security Filing (10+2) · Harmonized Tariff Schedule of the United States · Supreme Court of the United States: Learning Resources, Inc. v. Trump (No. 24-1287) · FDA: Registration and Listing of Cosmetic Product Facilities and Products · Federal Register: Proclamation 11012, Imposing a Temporary Import Surcharge (Section 122; terminated 2026-07-24) · Federal Register: Notice of Actions in Section 301 Investigations — forced labour (60 economies, effective 2026-07-24) · Federal Register: Customs User Fees To Be Adjusted for Inflation in Fiscal Year 2027 (CBP) · eCFR: 19 CFR 141.5 — time limit for entry (15 calendar days after landing) · Korea Customs Service: Export clearance · Korea Customs Service UNI-PASS · Korea Customs Service FTA Portal · Korea Strategic Trade Institute (Yestrade) · Korea Law Information Center: Customs Act, Foreign Trade Act · Animal and Plant Quarantine Agency · Korea Law Information Center: Notice on Export and Re-export Clearance (KCS Notice 2025-73) · Korea Ministry of Government Legislation (easylaw): trade system I (export) — duty and VAT refunds

I am a: Customs broker — Changes which blocks are emphasised