# United States tariff lines under HS 8504.21

> The United States tariff splits HS 8504.21 (liquid dielectric transformers: Having a power handling capacity not exceeding 650 kVA) into 4 national lines: 8504.21.00.20 (having a power handling capacity not exceeding 50 kVA), 8504.21.00.40 (having a power handling capacity exceeding 50 kVA but not exceeding 100 kVA), 8504.21.00.60 (having a power handling capacity exceeding 100 kVA but not exceeding 500 kVA) and 8504.21.00.80 (having a power handling capacity exceeding 500 kVA but not exceeding 650 kVA). Every United States line under 8504.21 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/850421
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 85](https://border.bot/countries/united-states/hs-codes/85) / [8504.21](https://border.bot/countries/united-states/hs-codes/850421)

## Key facts

- HS subheading: [8504.21](https://border.bot/hs-codes/850421)
- Duty (MFN): Free
- National lines: 4
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles

## United States lines under 8504.21

The United States tariff splits HS 8504.21 (liquid dielectric transformers: Having a power handling capacity not exceeding 650 kVA) into 4 national lines: 8504.21.00.20 (having a power handling capacity not exceeding 50 kVA), 8504.21.00.40 (having a power handling capacity exceeding 50 kVA but not exceeding 100 kVA), 8504.21.00.60 (having a power handling capacity exceeding 100 kVA but not exceeding 500 kVA) and 8504.21.00.80 (having a power handling capacity exceeding 500 kVA but not exceeding 650 kVA).

Every United States line under 8504.21 is free of general (MFN) duty.

- [8504.21.00.20](https://border.bot/countries/united-states/hs-codes/8504210020) Liquid dielectric transformers, Having a power handling capacity not exceeding 650 kVA, Having a power handling capacity not exceeding 50 kVA. Duty (MFN): free
- [8504.21.00.40](https://border.bot/countries/united-states/hs-codes/8504210040) Liquid dielectric transformers, Having a power handling capacity not exceeding 650 kVA, Having a power handling capacity exceeding 50 kVA but not exceeding 100 kVA. Duty (MFN): free
- [8504.21.00.60](https://border.bot/countries/united-states/hs-codes/8504210060) Liquid dielectric transformers, Having a power handling capacity not exceeding 650 kVA, Having a power handling capacity exceeding 100 kVA but not exceeding 500 kVA. Duty (MFN): free
- [8504.21.00.80](https://border.bot/countries/united-states/hs-codes/8504210080) Liquid dielectric transformers, Having a power handling capacity not exceeding 650 kVA, Having a power handling capacity exceeding 500 kVA but not exceeding 650 kVA. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 8504.21 yet.

- [The Harmonized System text for 8504.21](https://border.bot/hs-codes/850421)

- Previous subheading: [8504.10](https://border.bot/countries/united-states/hs-codes/850410) Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof
- Next subheading: [8504.22](https://border.bot/countries/united-states/hs-codes/850422) Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 8504.21?

The United States tariff splits HS 8504.21 (liquid dielectric transformers: Having a power handling capacity not exceeding 650 kVA) into 4 national lines: 8504.21.00.20 (having a power handling capacity not exceeding 50 kVA), 8504.21.00.40 (having a power handling capacity exceeding 50 kVA but not exceeding 100 kVA), 8504.21.00.60 (having a power handling capacity exceeding 100 kVA but not exceeding 500 kVA) and 8504.21.00.80 (having a power handling capacity exceeding 500 kVA but not exceeding 650 kVA).

### What is the duty on HS 8504.21 in the United States?

Every United States line under 8504.21 is free of general (MFN) duty.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/850421.json