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HSChapter 85
U.S. imports of ac generators (alternators), exceeding 750 kva output (HS 850164) totaled $138.9M in July 2026, traded with 29 countries.
Importers of AC Generators (Alternators), Exceeding 750 KVA Output paid $15.1M in duties in July 2026 — an effective duty rate of 13% on $117.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. AC Generators (Alternators), Exceeding 750 KVA Output imports of $138.9M in July 2026 ran 29% above the year-to-date monthly average of $107.9M.
Last updated: July 2026 dataLarge-capacity alternators exceeding 750 KVA serve utility-scale power generation, industrial co-generation, and renewable energy infrastructure — including dedicated wind turbine generator applications carved out under tariff lines 8501640110 and 8501640121. The US schedule further stratifies output into bands up to 10,000 KVA, 10,000–40,000 KVA, and above 40,000 KVA, each with distinct 10-digit lines, making precise output documentation essential at entry. Mexico is the leading supplier, with Romania and the Czech Republic — both EU members — also prominent sources. Units destined for wind power generating sets (HTS 8502.31.00) must be correctly identified at import to land in the appropriate tariff line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.2K shipments/mo
To claim a wind-power-specific line, importers typically need manufacturer documentation confirming the alternator is designed and intended for use in wind power generating sets classified under HTS 8502.31.00. A general-purpose alternator of the same KVA rating would fall into the non-specific (NES) lines. CBP may request engineering specifications or purchase orders confirming end-use.
The heading is subdivided into three output tiers — 750 KVA to 10,000 KVA, 10,001 KVA to 40,000 KVA, and above 40,000 KVA — each with separate 10-digit HTS lines. For large utility or hydro alternators, the rated output on the manufacturer's nameplate or test certificate is the controlling figure. Importers of multi-unit shipments should verify each unit's rating individually, as a single shipment may contain units spanning more than one tariff line.
Subheading 4 of 17 in heading 8501
Subheading 850164 · $138.9M of $1.2B
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8501640155 | AC Generators (Alternators) Exceeding 40,000 Kva | $59.8M | 4.04% | 100.00% | $2.4M |
| 8501640125 | AC Generators (Altrs) Bw 750 Kva - 10,000 Kva, Nes | $40.8M | 10.70% | 48.09% | $4.4M |
| 8501640110 | AC Genrtrs Gt750kva, For Wind Pwr Gnrtr 8502.31.00 | $24.3M | 27.45% | 100.00% | $6.7M |
| 8501640135 | AC Generators (Alt) Gt 10000 Kva But Lt= 40000 Kva | $14.1M | 11.78% | 100.00% | $1.7M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$138.9MYoY · Pro
Exports
$13.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Germany and Mexico together supply 48% of it.
customs district
destination
entry
rate provision · imports
15.3% enters free of duty; the effective duty rate is 10.88%.