U.S. exports of Electric Rotary Converters (HS 850240) totaled $1.4M in August 2026.
Importers of Electric Rotary Converters paid $79K in duties in August 2026, an average duty rate of 13.50% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
50 import shipments a month
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.
Subheading 7 of 7 in heading 8502
Subheading 850240 · $1.4M of $148.0M
ImportsExports
Imports
$588KYoY · free account
Exports
$1.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $9.3M of Electric Rotary Converters and exported $18.5M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 850240 — Electric Rotary Converters, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8502400000 | Electric Rotary Converters | $588K | 13.50% | 86.51% | $79K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8502400000 | Electric Rotary Converters | $1.4M |
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.
Exports · August 2026
destination
Mexico and United Kingdom together take 65% of it.
customs district
origin
entry
rate provision · imports
13.5% enters free of duty; duty collected equals 13.50% of imports for consumption.