HS Code 8504: Electric transformers, static converters (e.g. rectifiers) and inductors

Q: Is HS code 8504 the same in every country?

Yes — HS code 8504 is part of the WCO Harmonized System and is the same in every WCO member country at the 6-digit level. Beyond 6 digits, each country extends the code under its own system (e.g. HTSUS in the US, CN/TARIC in the EU, HSK in Korea, CCCHS in China) for national tariff rates and trade statistics. To see how a specific country classifies this code, select a country.

Q: Which WCO edition does HS code 8504 belong to, and has it been reclassified?

The Harmonized System is maintained by the World Customs Organization (WCO) and revised approximately every five years. The current edition is HS 2022, which replaced HS 2017 on 1 January 2022. Codes are added, merged, or split between editions to reflect new products and trade patterns, so a code valid in one edition may not exist or may mean something different in another.

Q: How do I find the correct country-specific version of HS code 8504?

Beyond the international 6-digit level, each country adds its own digits — the US extends to 10 digits (HTSUS), the EU to 8 or 10 (CN/TARIC), China to 13 (CCCHS), Korea to 10 (HSK), Japan to 9, and so on. To find the full code used by a specific country, select a country in TradeInt's HS Code Tool and search for 8504.

What is HS Code 8504

HS Code 8504 covers Electric transformers, static converters (e.g. rectifiers) and inductors. It is a 4-digit heading within Chapter 85 (Electrical machinery and equipment and parts thereof; sound recordersand reproducers, television image and sound recorders and reproducers, and parts andaccessories of such articles), Section XVI. Its 6-digit subheadings are identical in every HS-adopting country; from the 7th digit onward, each country extends the code for its own tariff and statistics.

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What does HS Code 8504 Electric transformers, static converters (e.g. rectifiers) and inductors Cover?

Section XVI

Chapters (84-85) Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles

Chapter 85

Electrical machinery and equipment and parts thereof; sound recordersand reproducers, television image and sound recorders and reproducers, and parts andaccessories of such articles

HS Code 8504

Electric transformers, static converters (e.g. rectifiers) and inductors

HS Code 850422

Electrical transformers; liquid dielectric, having a power handling capacity exceeding 650kVA but not exceeding 10,000kVA

HS Code 850431

Electrical transformers; n.e.c. in item no. 8504.2, having a power handling capacity not exceeding 1kVA

HS Code 850440

Electrical static converters

HS Code 850450

Electrical inductors; n.e.c. in heading no. 8504

HS Code 850490

Electrical transformers, static converters and inductors; parts thereof

HS Code 850410

Discharge lamps or tubes; ballasts therefor

HS Code 850421

Electrical transformers; liquid dielectric, having a power handling capacity not exceeding 650kVA

HS Code 850423

Electrical transformers; liquid dielectric, having a power handling capacity exceeding 10,000kVA

HS Code 850432

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 1kVA but not exceeding 16kVA

HS Code 850433

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 16kVA but not exceeding 500kVA

HS Code 850434

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 500kVA

Click any HS code above to see live 2026 latest Transformers and Rectifiers trade data including exporters, importers, and shipment volumes.

What HS Codes for Electrical Machinery Do Not Cover

Chapter 85 covers electrical machinery, equipment, recorded media, and parts. Goods frequently misclassified here but that belong elsewhere include:

Electrically heated blankets, pads, foot-muffs

Chapter 63

Electric medical instruments (X-ray, ECG, MRI)

Chapter 90

Electric vehicles

Chapter 87

Electric lamps and lighting fittings

heading 9405

This list highlights common classification errors only — it is not exhaustive. For binding classification, work with a licensed customs broker or qualified trade compliance professional.

Related HS Codes under Transformers and Rectifiers HS 8504

HS Code 850410

Discharge lamps or tubes; ballasts therefor

HS Code 850421

Electrical transformers; liquid dielectric, having a power handling capacity not exceeding 650kVA

HS Code 850422

Electrical transformers; liquid dielectric, having a power handling capacity exceeding 650kVA but not exceeding 10,000kVA

HS Code 850423

Electrical transformers; liquid dielectric, having a power handling capacity exceeding 10,000kVA

HS Code 850431

Electrical transformers; n.e.c. in item no. 8504.2, having a power handling capacity not exceeding 1kVA

HS Code 850432

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 1kVA but not exceeding 16kVA

HS Code 850433

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 16kVA but not exceeding 500kVA

HS Code 850434

Transformers; n.e.c. in item no. 8504.2, having a power handling capacity exceeding 500kVA

HS Code 850440

Electrical static converters

HS Code 850450

Electrical inductors; n.e.c. in heading no. 8504

Frequently Asked Questions

What is HS code 8504?

HS code 8504 covers Electric transformers, static converters (e.g. rectifiers) and inductors, a heading within Chapter 85 (Electrical machinery and equipment and parts thereof; sound recordersand reproducers, television image and sound recorders and reproducers, and parts andaccessories of such articles) of the WCO Harmonized System. Headings sit between the broad chapter level and the more specific 6-digit subheading level.

Is HS code 8504 the same in every country?

Which WCO edition does HS code 8504 belong to, and has it been reclassified?

How do I find the correct country-specific version of HS code 8504?