# HS code 8504.31: Other transformers, having a power handling capacity not exceeding 1 kVA > HS code 8504.31 covers other transformers, having a power handling capacity not exceeding 1 kVA. It sits in heading 85.04 (electrical transformers, static converters (for example, rectifiers) and inductors) in 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). Other goods of heading 85.04 are classified under 8504.10 (ballasts for discharge lamps or tubes), 8504.21 (liquid dielectric transformers, having a power handling capacity not exceeding 650 kVA), 8504.22 (liquid dielectric transformers, having a power handling capacity exceeding 650 kVA but not exceeding 10,000 kVA), 8504.23 (liquid dielectric transformers, having a power handling capacity exceeding 10,000 kVA) or 6 others. National tariff lines under 8504.31 are live on border.bot for the United States (4 lines, also used by 1 other country). Source: https://border.bot/hs-codes/850431 Last updated: 11 October 2026 [HS codes](https://border.bot/hs-codes) / [Chapter 85](https://border.bot/hs-codes/85) / [85.04](https://border.bot/hs-codes/8504) / [8504.31](https://border.bot/hs-codes/850431) ## Key facts - HS code: 8504.31 - Covers: Other transformers, having a power handling capacity not exceeding 1 kVA - Heading: [85.04: Electrical transformers, static converters (for example, rectifiers) and inductors](https://border.bot/hs-codes/8504) - 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](https://border.bot/hs-codes/85) - Edition: HS2022 - Duty in the United States: [See its 4 lines](https://border.bot/countries/united-states/hs-codes/850431) ## What this code covers HS code 8504.31 covers other transformers, having a power handling capacity not exceeding 1 kVA. The legal text of the subheading is “Other transformers: Having a power handling capacity not exceeding 1 kVA”, read under “Other transformers”, in HS2022. ## What it doesn’t cover Other goods of heading 85.04 are classified under 8504.10 (ballasts for discharge lamps or tubes), 8504.21 (liquid dielectric transformers, having a power handling capacity not exceeding 650 kVA), 8504.22 (liquid dielectric transformers, having a power handling capacity exceeding 650 kVA but not exceeding 10,000 kVA), 8504.23 (liquid dielectric transformers, having a power handling capacity exceeding 10,000 kVA) or 6 others. - [8504.10](https://border.bot/hs-codes/850410) Ballasts for discharge lamps or tubes - [8504.21](https://border.bot/hs-codes/850421) Liquid dielectric transformers: Having a power handling capacity not exceeding 650 kVA - [8504.22](https://border.bot/hs-codes/850422) Liquid dielectric transformers: Having a power handling capacity exceeding 650 kVA but not exceeding 10,000 kVA - [8504.23](https://border.bot/hs-codes/850423) Liquid dielectric transformers: Having a power handling capacity exceeding 10,000 kVA - [8504.32](https://border.bot/hs-codes/850432) Other transformers: Having a power handling capacity exceeding 1 kVA but not exceeding 16 kVA - [8504.33](https://border.bot/hs-codes/850433) Other transformers: Having a power handling capacity exceeding 16 kVA but not exceeding 500 kVA - [8504.34](https://border.bot/hs-codes/850434) Other transformers: Having a power handling capacity exceeding 500 kVA - [8504.40](https://border.bot/hs-codes/850440) Static converters - [8504.50](https://border.bot/hs-codes/850450) Other inductors - [8504.90](https://border.bot/hs-codes/850490) Parts ## How it is structured 8504.31 is a six-digit subheading. Its first two digits, 85, are the chapter; the first four, 8504, are heading 85.04; the last two, 31, identify the subheading within the heading. Countries add their own digits after these six for their national tariff lines. - 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 - Heading 85.04: Electrical transformers, static converters (for example, rectifiers) and inductors - Within the heading: Other transformers - Subheading 8504.31: Having a power handling capacity not exceeding 1 kVA ## In other countries National tariff lines under 8504.31 are live on border.bot for the United States (4 lines, also used by 1 other country). - [United States](https://border.bot/countries/united-states/hs-codes/850431): 4 lines, used by 1 other country - Previous subheading: [8504.23](https://border.bot/hs-codes/850423) Liquid dielectric transformers: Having a power handling capacity exceeding 10,000 kVA - Next subheading: [8504.32](https://border.bot/hs-codes/850432) Other transformers: Having a power handling capacity exceeding 1 kVA but not exceeding 16 kVA ## Frequently asked questions ### What does HS code 8504.31 cover? HS code 8504.31 covers other transformers, having a power handling capacity not exceeding 1 kVA. ### Which heading and chapter is HS code 8504.31 in? HS code 8504.31 is in heading 85.04 (electrical transformers, static converters (for example, rectifiers) and inductors) in 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). ### Where are goods of heading 85.04 classified when 8504.31 doesn’t fit? Other goods of heading 85.04 are classified under 8504.10 (ballasts for discharge lamps or tubes), 8504.21 (liquid dielectric transformers, having a power handling capacity not exceeding 650 kVA), 8504.22 (liquid dielectric transformers, having a power handling capacity exceeding 650 kVA but not exceeding 10,000 kVA), 8504.23 (liquid dielectric transformers, having a power handling capacity exceeding 10,000 kVA) or 6 others. ### Which countries’ tariffs list national lines under HS code 8504.31? National tariff lines under 8504.31 are live on border.bot for the United States (4 lines, also used by 1 other country). ## Sources and updates The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026. This page was last updated on 11 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. Machine-readable: https://border.bot/hs-codes/850431.json