# United States tariff lines under HS 8504.31

> The United States tariff splits HS 8504.31 (other transformers: Having a power handling capacity not exceeding 1 kVA) into 4 national lines: 8504.31.20.00 (unrated), 8504.31.40.35 (having a power handling capacity less than 40 VA), 8504.31.40.65 (having a power handling capacity 40 VA or greater) and 8504.31.60.00 (having a power handling capacity of 1 kVA). The general (MFN) duty differs by line: free on 8504.31.20.00, 6.6% on 8504.31.40.35, 6.6% on 8504.31.40.65 and 1.6% on 8504.31.60.00.

Source: https://border.bot/countries/united-states/hs-codes/850431
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) / [8504.31](https://border.bot/countries/united-states/hs-codes/850431)

## Key facts

- HS subheading: [8504.31](https://border.bot/hs-codes/850431)
- 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 8504.31

The United States tariff splits HS 8504.31 (other transformers: Having a power handling capacity not exceeding 1 kVA) into 4 national lines: 8504.31.20.00 (unrated), 8504.31.40.35 (having a power handling capacity less than 40 VA), 8504.31.40.65 (having a power handling capacity 40 VA or greater) and 8504.31.60.00 (having a power handling capacity of 1 kVA).

The general (MFN) duty differs by line: free on 8504.31.20.00, 6.6% on 8504.31.40.35, 6.6% on 8504.31.40.65 and 1.6% on 8504.31.60.00.

- [8504.31.20.00](https://border.bot/countries/united-states/hs-codes/8504312000) Other transformers, Having a power handling capacity not exceeding 1 kVA, Unrated. Duty (MFN): free
- [8504.31.40.35](https://border.bot/countries/united-states/hs-codes/8504314035) Other transformers, Having a power handling capacity not exceeding 1 kVA, Other, Having a power handling capacity less than 1 kVA, Having a power handling capacity less than 40 VA. Duty (MFN): 6.6%
- [8504.31.40.65](https://border.bot/countries/united-states/hs-codes/8504314065) Other transformers, Having a power handling capacity not exceeding 1 kVA, Other, Having a power handling capacity less than 1 kVA, Having a power handling capacity 40 VA or greater. Duty (MFN): 6.6%
- [8504.31.60.00](https://border.bot/countries/united-states/hs-codes/8504316000) Other transformers, Having a power handling capacity not exceeding 1 kVA, Other, Having a power handling capacity of 1 kVA. Duty (MFN): 1.6%

## In other countries

No other national tariff on border.bot has live lines under 8504.31 yet.

- [The Harmonized System text for 8504.31](https://border.bot/hs-codes/850431)

- Previous subheading: [8504.23](https://border.bot/countries/united-states/hs-codes/850423) Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof
- Next subheading: [8504.32](https://border.bot/countries/united-states/hs-codes/850432) 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 8504.31?

The United States tariff splits HS 8504.31 (other transformers: Having a power handling capacity not exceeding 1 kVA) into 4 national lines: 8504.31.20.00 (unrated), 8504.31.40.35 (having a power handling capacity less than 40 VA), 8504.31.40.65 (having a power handling capacity 40 VA or greater) and 8504.31.60.00 (having a power handling capacity of 1 kVA).

### What is the duty on HS 8504.31 in the United States?

The general (MFN) duty differs by line: free on 8504.31.20.00, 6.6% on 8504.31.40.35, 6.6% on 8504.31.40.65 and 1.6% on 8504.31.60.00.

## 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/850431.json