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HSChapter 85
U.S. imports of electrical transformers over 500 kva (nesoi) (HS 850434) totaled $80.5M in April 2026, traded with 24 countries.
Importers of Electrical Transformers Over 500 KVA (NESOI) paid $6.0M in duties in April 2026 — an effective duty rate of 12% on $51.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataLarge-capacity electrical transformers exceeding 500 KVA are critical infrastructure components for power generation, transmission, and industrial distribution systems. The entire heading consolidates under a single 10-digit line, 8504340000, which is subject to Section 301 tariffs on goods of Chinese origin — a significant cost consideration given China's presence among top suppliers. Mexico leads US import supply, followed by South Korea and Germany, making USMCA origin qualification and KORUS duty treatment relevant planning factors for procurement teams. Lead times for high-KVA units can stretch to 12–18 months, so tariff exposure and supplier diversification deserve early attention in capital project planning.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
No. Heading 850434 covers transformers with a power handling capacity exceeding 500 KVA. A unit rated at exactly 500 KVA would fall under the adjacent heading for transformers of 250–500 KVA. Confirm the nameplate rating and consult a licensed customs broker to ensure correct classification.
Yes. Transformers classified under 8504340000 and originating from China are subject to Section 301 tariffs in addition to the standard MFN duty rate. Importers should verify the current Section 301 list status and applicable exclusions before finalizing sourcing decisions.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $41.6M | $221K | -$41.4M |
| KOREA, SOUTH | $13.5M | $238K | -$13.3M |
| GERMANY | $7.1M | -- | -$7.1M |
| CANADA | $5.7M | $1.1M | -$4.6M |
| CHINA | $5.7M | -- | -$5.7M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8504340000 | TRANSFORMERS, GT 500 KVA, NESOI | $80.5M | 11.51% | $6.0M |
TRANSFORMERS, GT 500 KVA, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8504340000 | TRANSFORMERS, GT 500 KVA, NESOI | $2.1M |
TRANSFORMERS, GT 500 KVA, NESOI
39 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
Monthly import values over time
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $26.7M | $300K | -$26.4M |
| Wisconsin | $13.5M | $134K | -$13.3M |
| North Carolina | $12.3M | $24K | -$12.3M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LAREDO, TX | $18.1M | $197K | -$17.9M |
| LOS ANGELES, CA | $12.3M | -- | -$12.3M |
| OTAY MESA, CA | $10.1M | -- | -$10.1M |