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SITCSection 7
U.S. imports of fuses for electrical apparatus — circuits exceeding 1,000 volts (SITC 77241) totaled $22.9M in April 2026, traded with 32 countries.
Importers of Fuses for Electrical Apparatus — Circuits Exceeding 1,000 Volts paid $1.1M in duties in April 2026 — an effective duty rate of 17% on $6.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataHigh-voltage fuses rated for circuits above 1,000 volts are purpose-built overcurrent protection devices used in utility distribution networks, industrial substations, and large motor control centers — applications where a standard low-voltage fuse would be inadequate. Their construction — typically involving arc-quenching sand fill, silver or copper fusible elements, and ceramic or fiberglass bodies — is fundamentally different from low-voltage fuses, and that distinction drives classification. Importers should be aware that high-voltage switchgear components, including fuses, may be subject to Section 301 tariffs depending on origin, and that utility procurement cycles often require long lead times and country-of-origin documentation for grid-reliability compliance.
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High-voltage fuses typically use silver or copper fusible elements enclosed in a ceramic or fiberglass body filled with arc-quenching silica sand, and are rated by both voltage class and interrupting capacity (kA). Low-voltage fuses use simpler construction and are rated for circuits up to 1,000 V. The voltage rating on the fuse body and its datasheet is the primary classification evidence; importers should ensure commercial invoices state the rated voltage explicitly.
Federal and state utility procurement programs — including Buy America provisions applicable to federally funded grid projects — can impose domestic content or country-of-origin requirements on switchgear components including high-voltage fuses. Importers supplying utility customers should confirm whether the end-use project is subject to such requirements before finalizing sourcing, as non-compliance can result in contract penalties independent of customs obligations.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | $15.0M | $2.5M | -$12.5M |
| CANADA | $1.1M | $4.1M | +$3.0M |
| DOMINICAN REPUBLIC | $2.0M | $5K | -$1.9M |
| CHINA | $1.4M | $270K | -$1.2M |
| GERMANY | $1.5M | $35K | -$1.4M |