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SITCSection 7
U.S. imports of fuses for electrical apparatus — circuits exceeding 1,000 volts (SITC 77241) totaled $22.5M in July 2026, traded with 38 countries.
Importers of Fuses for Electrical Apparatus — Circuits Exceeding 1,000 Volts paid $1.2M in duties in July 2026 — an effective duty rate of 18% on $6.9M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Basic heading 332 of 642 in section 7
Basic heading 77241 · $22.5M of $175.6B
High-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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
2.5K shipments/mo
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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Imports · July 2026
origin
Mexico and Dominican Republic together supply 76% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$22.5MYoY · Pro
Exports
$8.5MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.