# United States tariff lines under HS 8503.00

> The United States tariff splits HS 8503.00 (parts suitable for use solely or principally with the machines of heading 85.01 or 85.02) into 11 national lines: 8503.00.20.00 (commutators), 8503.00.35.00 (for motors of under 18.65 W), 8503.00.45.00 (for generators suitable for use on aircraft), 8503.00.65.00 (other) and 7 others.

Source: https://border.bot/countries/united-states/hs-codes/850300
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) / [8503.00](https://border.bot/countries/united-states/hs-codes/850300)

## Key facts

- HS subheading: [8503.00](https://border.bot/hs-codes/850300)
- National lines: 11
- 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 8503.00

The United States tariff splits HS 8503.00 (parts suitable for use solely or principally with the machines of heading 85.01 or 85.02) into 11 national lines: 8503.00.20.00 (commutators), 8503.00.35.00 (for motors of under 18.65 W), 8503.00.45.00 (for generators suitable for use on aircraft), 8503.00.65.00 (other) and 7 others.

- [8503.00.20.00](https://border.bot/countries/united-states/hs-codes/8503002000) Commutators. Duty (MFN): 2.4%
- [8503.00.35.00](https://border.bot/countries/united-states/hs-codes/8503003500) Stators and rotors for the goods of heading 8501, For motors of under 18.65 W. Duty (MFN): 6.5%
- [8503.00.45.00](https://border.bot/countries/united-states/hs-codes/8503004500) Stators and rotors for the goods of heading 8501, For generators suitable for use on aircraft. Duty (MFN): free
- [8503.00.65.00](https://border.bot/countries/united-states/hs-codes/8503006500) Stators and rotors for the goods of heading 8501, Other. Duty (MFN): 3%
- [8503.00.75.00](https://border.bot/countries/united-states/hs-codes/8503007500) Other, For motors of under 18.65 W. Duty (MFN): 6.5%
- [8503.00.90.00](https://border.bot/countries/united-states/hs-codes/8503009000) Other, For generators suitable for use on aircraft. Duty (MFN): free
- [8503.00.95.20](https://border.bot/countries/united-states/hs-codes/8503009520) Other, Other, Parts of motors. Duty (MFN): 3%
- [8503.00.95.46](https://border.bot/countries/united-states/hs-codes/8503009546) Other, Other, Parts of generators, For AC generators (alternators) classified in statistical reporting number 8501.64.0110. Duty (MFN): 3%
- [8503.00.95.50](https://border.bot/countries/united-states/hs-codes/8503009550) Other, Other, Parts of generators, Other. Duty (MFN): 3%
- [8503.00.95.70](https://border.bot/countries/united-states/hs-codes/8503009570) Other, Other, Other, Parts of wind-powered generating sets classified in subheading 8502.31.00. Duty (MFN): 3%
- [8503.00.95.80](https://border.bot/countries/united-states/hs-codes/8503009580) Other, Other, Other, Other. Duty (MFN): 3%

## In other countries

No other national tariff on border.bot has live lines under 8503.00 yet.

- [The Harmonized System text for 8503.00](https://border.bot/hs-codes/850300)

- Previous subheading: [8502.40](https://border.bot/countries/united-states/hs-codes/850240) Electric generating sets and rotary converters
- Next subheading: [8504.10](https://border.bot/countries/united-states/hs-codes/850410) 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 8503.00?

The United States tariff splits HS 8503.00 (parts suitable for use solely or principally with the machines of heading 85.01 or 85.02) into 11 national lines: 8503.00.20.00 (commutators), 8503.00.35.00 (for motors of under 18.65 W), 8503.00.45.00 (for generators suitable for use on aircraft), 8503.00.65.00 (other) and 7 others.

## 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/850300.json