HS 8504 — Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof
Under HTS heading 8504, 49 of the 63 statistical lines are Free under Column 1 and the rest run from 1.6% to 6.6%, against a statutory Column 2 rate of 35% for non-normal-trade-relations origins, as of HTS 2026-10-19, published by the USITC, the official agency that maintains the schedule.
Heading 8504 covers “Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof” under Chapter 85. Get an instant duty estimate:
What is the US tariff rate for HS heading 8504? The 2026-10-19 schedule prices heading 8504 line by line: 8504.10.00.00 (Ballasts for discharge lamps or tubes) at 3%; 8504.31.40 (Having a power handling capacity less than 1 kVA) at 6.6%; 8504.90.96.90 (Other) at Free; and 60 further lines in the table below. Column 2, the statutory rate for non-normal-trade-relations origins, is 35%; 14 of the 63 lines name a special-program symbol in the Special column.
How do I estimate duty for HS 8504? Duty equals entered value times the line's own Column 1 rate, plus any Chapter 99 trade-remedy surcharge: a $10,000 entry on 8504.10.00.00 (Ballasts for discharge lamps or tubes) at 3% comes to $300 of duty before any surcharge. 14 of the 63 8504 lines carry a rate above zero.
Which HTS statistical lines sit under heading 8504? Heading 8504 holds 63 statistical lines in the HTS 2026-10-19 export, including 8504.10.00.00, 8504.21.00, 8504.21.00.20 and 60 more. The priced lines: 8504.10.00.00 at 3%; 8504.23.00 at 1.6%; 8504.23.00.41 at 1.6%; 8504.23.00.45 at 1.6%; 10 further priced lines follow.
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US Tariff Rates — Heading 8504
Heading 8504 holds 63 HTS statistical lines in the 2026-10-19 USITC export: 8504.10.00.00 (Ballasts for discharge lamps or tubes) at 3%; 8504.31.40 (Having a power handling capacity less than 1 kVA) at 6.6%; 8504.90.96.90 (Other) at Free; and 60 further lines in the table below. Column 2, the statutory rate for non-normal-trade-relations origins, is 35%; 49 lines duty-free, 9 lines at 1.6%, 1 line at 2.4%, 1 line at 3% and 3 lines at 6.6%. Duty estimates on this page are informational and not a binding customs ruling.
Data as of 2026-10-19 · Source: USITC
| HTS line | Description | Unit | General (Col. 1) | Special | Column 2 |
|---|---|---|---|---|---|
| 8504.10.00.00 | Ballasts for discharge lamps or tubes | No. | 3% | Free (A*,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.21.00 | Having a power handling capacity not exceeding 650 kVA | — | Free | — | 35% |
| 8504.21.00.20 | Having a power handling capacity not exceeding 50 kVA | No.; kg | Free | — | 35% |
| 8504.21.00.40 | Having a power handling capacity exceeding 50 kVA but not exceeding 100 kVA | No.; kg | Free | — | 35% |
| 8504.21.00.60 | Having a power handling capacity exceeding 100 kVA but not exceeding 500 kVA | No.; kg | Free | — | 35% |
| 8504.21.00.80 | Having a power handling capacity exceeding 500 kVA but not exceeding 650 kVA | No.; kg | Free | — | 35% |
| 8504.22.00 | Having a power handling capacity exceeding 650 kVA but not exceeding 10,000 kVA | — | Free | — | 35% |
| 8504.22.00.40 | Having a power handling capacity exceeding 650 kVA but not exceeding 2,500 kVA | No.; kg | Free | — | 35% |
| 8504.22.00.80 | Having a power handling capacity exceeding 2,500 kVA but not exceeding 10,000 kVA | No.; kg | Free | — | 35% |
| 8504.23.00 | Having a power handling capacity exceeding 10,000 kVA | — | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.23.00.41 | Having a power handling capacity exceeding 10,000 kVA but not exceeding 59,999 kVA | No.; kg | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.23.00.45 | Having a power handling capacity exceeding 59,999 kVA but not exceeding 100,000 kVA | No.; kg | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.23.00.80 | Having a power handling capacity exceeding 100,000 kVA | No.; kg | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.31.20.00 | Unrated | No. | Free | — | 35% |
| 8504.31.40 | Having a power handling capacity less than 1 kVA | — | 6.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.31.40.35 | Having a power handling capacity less than 40 VA | No. | 6.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.31.40.65 | Having a power handling capacity 40 VA or greater | No. | 6.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.31.60.00 | Having a power handling capacity of 1 kVA | No. | 1.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.32.00.00 | Having a power handling capacity exceeding 1 kVA but not exceeding 16 kVA | No.; kg | 2.4% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.33.00 | Having a power handling capacity exceeding 16 kVA but not exceeding 500 kVA | — | 1.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.33.00.20 | Having a power handling capacity exceeding 16 kVA but not exceeding 50 kVA | No.; kg | 1.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.33.00.40 | Having a power handling capacity exceeding 50 kVA but not exceeding 500 kVA | No.; kg | 1.6% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.34.00.00 | Having a power handling capacity exceeding 500 kVA | No.; kg | 1.6% | Free (A,AU,B,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8504.40.40.00 | Speed drive controllers for electric motors | No. | Free | — | 35% |
| 8504.40.60 | Suitable for physical incorporation into automatic data processing machines or units thereof of heading 8471 | — | Free | — | 35% |
| 8504.40.60.01 | With a power output not exceeding 50 W | No. | Free | — | 35% |
| 8504.40.60.07 | With a power output exceeding 50 W but not exceeding 150 W | No. | Free | — | 35% |
| 8504.40.60.12 | With a power output exceeding 150 W but not exceeding 500 W | No. | Free | — | 35% |
| 8504.40.60.18 | Other | No. | Free | — | 35% |
| 8504.40.70 | Other | — | Free | — | 35% |
| 8504.40.70.01 | With a power output not exceeding 50 W | No. | Free | — | 35% |
| 8504.40.70.07 | With a power output exceeding 50 W but not exceeding 150 W | No. | Free | — | 35% |
| 8504.40.70.12 | With a power output exceeding 150 W but not exceeding 500 W | No. | Free | — | 35% |
| 8504.40.70.18 | Other | No. | Free | — | 35% |
| 8504.40.85.00 | For telecommunication apparatus | No. | Free | — | 35% |
| 8504.40.95 | Other | — | Free | — | 35% |
| 8504.40.95.10 | With a power output not exceeding 50 W | No. | Free | — | 35% |
| 8504.40.95.20 | With a power output exceeding 50 W but not exceeding 150 W | No. | Free | — | 35% |
| 8504.40.95.30 | With a power output exceeding 150 W but not exceeding 500 W | No. | Free | — | 35% |
| 8504.40.95.40 | Other | No. | Free | — | 35% |
| 8504.40.95.50 | Other | No. | Free | — | 35% |
| 8504.40.95.71 | Of a capacity not exceeding 200 W | No. | Free | — | 35% |
| 8504.40.95.73 | Of a capacity exceeding 200 W but not exceeding 650 W | No. | Free | — | 35% |
| 8504.40.95.75 | Of a capacity exceeding 650 W but not exceeding 20,000 W | No. | Free | — | 35% |
| 8504.40.95.77 | Of a capacity exceeding 20,000 W but not exceeding 125,000 W | No. | Free | — | 35% |
| 8504.40.95.78 | Of a capacity exceeding 125,000 W but not exceeding 1,000,000 W | No. | Free | — | 35% |
| 8504.40.95.79 | Other | No. | Free | — | 35% |
| 8504.40.95.80 | Other | No. | Free | — | 35% |
| 8504.50.40.00 | For power supplies for automatic data processing machines or units thereof of heading 8471; power supplies for goods of subheading 8443.31 or 8443.32; power supplies for monitors of subheading 8528.42 or 8528.52 or projectors of subheading 8528.62; for telecommunication apparatus | No. | Free | — | 35% |
| 8504.50.80.00 | Other | No. | Free | — | 35% |
| 8504.90.20.00 | Printed circuit assemblies | No. | Free | — | 35% |
| 8504.90.41.00 | Other | No. | Free | — | 35% |
| 8504.90.65.00 | Of the goods of subheading 8504.40 or 8504.50 for telecommunication apparatus | No. | Free | — | 35% |
| 8504.90.75.00 | Other | No. | Free | — | 35% |
| 8504.90.96 | Other | — | Free | — | 35% |
| 8504.90.96.10 | For transformers | No. | Free | — | 35% |
| 8504.90.96.30 | Other | No. | Free | — | 35% |
| 8504.90.96.34 | Laminations for incorporation into stacked cores | No.; kg | Free | — | 35% |
| 8504.90.96.38 | Stacked cores for incorporation into transformers | No.; kg | Free | — | 35% |
| 8504.90.96.42 | Wound cores for incorporation into transformers | No.; kg | Free | — | 35% |
| 8504.90.96.46 | Other | No.; kg | Free | — | 35% |
| 8504.90.96.50 | Of static converters | No. | Free | — | 35% |
| 8504.90.96.90 | Other | No. | Free | — | 35% |
Source: USITC Harmonized Tariff Schedule (hts.usitc.gov REST export), 2026-10-19 build. The table reproduces this heading's 63 rows verbatim, 8504.10.00.00 through 8504.90.96.90. “Special” lists 8504.10.00.00 through 8504.90.96.90's free-trade-program preferences (A+, AU, BH…). Verify against the current USITC schedule before entry.
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Recent changes — Heading 8504
Active Section 301 measures touching this heading's HTS lines, aggregated from the current USITC Chapter 99 release. source
| Measure | Origin | Additional duty | HTS lines hit |
|---|---|---|---|
| section_301_china | China | 7.5% | 1 |
| section_301_china | China | 25% | 11 |
| section_301_china | China | 25% | 10 |
Rate-change alerts for HS 8504
An amendment to 8504.10.00.00 (Ballasts for discharge lamps or tubes) or to the 62 other lines here lands on this page with the next USITC export. Rate changes for this heading go to the site alert feed (no signup) and, on Pro, to your account inbox — that is the channel that works today. We cannot send email yet, so this form only saves your address; nothing is mailed, and we will write to you as soon as we can.
Sources: USITC Harmonized Tariff Schedule — heading 8504 · U.S. Customs & Border Protection — CROSS rulings