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SITCSection 7
U.S. imports of automatic circuit breakers — voltage less than 72.5 kv (SITC 77242) totaled $63.4M in July 2026, traded with 23 countries.
Importers of Automatic Circuit Breakers — Voltage Less Than 72.5 kV paid $1.8M in duties in July 2026 — an effective duty rate of 11% on $16.0M in dutiable value, based on actual customs collections rather than the published tariff schedule. Automatic Circuit Breakers — Voltage Less Than 72.5 kV imports of $63.4M in July 2026 ran 16% above the year-to-date monthly average of $54.7M.
Basic heading 202 of 642 in section 7
Basic heading 77242 · $63.4M of $175.6B
Automatic circuit breakers for voltages below 72.5 kV span a wide commercial range — from molded-case breakers used in commercial buildings and industrial panels to medium-voltage vacuum and SF₆ breakers deployed in distribution substations. The 72.5 kV ceiling is the IEC-defined boundary between medium-voltage and high-voltage equipment, making it the critical specification to verify on technical datasheets before classification. Section 301 tariffs have affected Chinese-origin switchgear in this category, prompting US utilities and industrial buyers to reassess supply chains. Importers should also confirm whether any specific breaker model requires UL or ANSI certification for the intended US installation, as listing requirements are enforced independently of customs clearance.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
863 shipments/mo
The rated maximum voltage (Ur or Um in IEC terminology, or rated voltage in ANSI standards) stated on the nameplate and in the manufacturer's technical datasheet is the controlling specification. Importers should include the datasheet or catalog page with the entry documentation; if the nameplate voltage is at or near 72.5 kV, a binding ruling from CBP may be warranted to avoid reclassification into the higher-voltage heading.
SF₆ (sulfur hexafluoride) is a potent greenhouse gas regulated under EPA's Greenhouse Gas Reporting Program for certain end-use sectors, but its presence in a sealed switchgear unit does not currently trigger an import permit requirement at the border. However, buyers should be aware of evolving state-level restrictions (California, for example, has adopted SF₆ phase-down rules for utilities) that may affect the long-term usability of imported SF₆-insulated equipment.
Supplier Network
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Imports · July 2026
origin
Canada and Mexico together supply 74% 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
$63.4MYoY · Pro
Exports
$6.3MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.