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HSChapter 85
U.S. imports of electric rotary converters (HS 850240) totaled $565K in April 2026, traded with 23 countries.
Importers of Electric Rotary Converters paid $80K in duties in April 2026 — an effective duty rate of 15% on $539K in dutiable value, based on actual customs collections rather than the published tariff schedule. Electric Rotary Converters imports of $565K in April 2026 ran 15% below the year-to-date monthly average of $664K.
Last updated: April 2026 dataElectric rotary converters — machines that mechanically convert AC to DC or between frequencies using rotating components — occupy a narrow but technically distinct niche from static inverters and transformers. The entire heading resolves to a single 10-digit line (8502400000), simplifying classification but placing the burden on importers to distinguish rotary from static conversion equipment, which classifies elsewhere. The United Kingdom and Germany are the leading US suppliers, reflecting the specialized industrial and legacy-power-system applications where rotary converters remain preferred over solid-state alternatives. China is also a notable source, making origin verification relevant for Section 301 exposure assessment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A rotary converter uses a rotating electromechanical assembly — essentially a combined motor and generator — to convert electrical power, whereas a static converter (heading 8504) performs conversion using solid-state components with no moving parts. If the unit contains a rotating shaft and windings performing the conversion function, it belongs in 8502.40; purely electronic inverters, rectifiers, and AC/DC adapters go in 8504. When the design is ambiguous, a binding ruling from CBP is advisable.
Rotary converters remain in active use in rail traction systems, legacy industrial facilities requiring precise frequency conversion, certain military and marine applications, and high-power welding operations where their electrical characteristics are preferred. The dominance of UK and German suppliers reflects the concentration of this specialized manufacturing in European industrial equipment sectors.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| BELGIUM | $266K | -- | -$266K |
| UNITED KINGDOM | $108K | $73K | -$34K |
| KOREA, SOUTH | -- | $156K | +$156K |
| CANADA | -- | $143K | +$143K |
| CHINA | $47K | $62K | +$16K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8502400000 | ELECTRIC ROTARY CONVERTERS | $565K | 14.84% | $80K |
ELECTRIC ROTARY CONVERTERS
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8502400000 | ELECTRIC ROTARY CONVERTERS | $1.1M |
ELECTRIC ROTARY CONVERTERS
219 no
MACH FOR RECP/CONVR/TRANS/REGN OF VOICE/IMAGE/DATA
HS 851762
SOLID-STATE NON-VOL SEMICONDUCTOR STORAGE DEVICES
HS 852351
SMARTPHONES
HS 851713
PROCESSORS AND CONTROLLERS, ELECTRONIC INTEG CIRCT
HS 854231
CONTROLS ETC W ELECT APPR F ELECT CONT NOV 1000 V
HS 853710
STATIC CONVERTERS; ADP POWER SUPPLIES
HS 850440
| State | Imports | Exports | Balance |
|---|---|---|---|
| Florida | -- | $409K | +$409K |
| Hawaii | $266K | -- | -$266K |
| California | $41K | $73K | +$32K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $289K | $7K | -$281K |
| ATLANTA, GA | -- | $182K | +$182K |
| NEW ORLEANS, LA | $21K | $157K | +$135K |