U.S. imports of Automatic Circuit Breakers (Not Exceeding 1,000 Volts) (SITC 77252) totaled $250.6M in August 2026, imported from 68 countries.
Importers of Automatic Circuit Breakers (Not Exceeding 1,000 Volts) paid $20.7M in duties in August 2026, an average duty rate of 8.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Automatic Circuit Breakers (Not Exceeding 1,000 Volts) imports of $250.6M in August 2026 ran 14% above the year-to-date monthly average of $219.9M.
Last updated: August 2026 dataAutomatic circuit breakers rated at or below 1,000 V are foundational components in residential panels, commercial building electrical systems, and industrial motor-control centers, making them among the most actively traded low-voltage protection devices. Key specification distinctions for classification and procurement include interrupting rating (kA), pole configuration (single, double, triple), and trip mechanism type (thermal-magnetic vs. electronic). Chinese-origin circuit breakers in this category have been subject to Section 301 tariffs, a factor that has driven notable sourcing shifts toward alternative manufacturing countries.
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21.9K import shipments a month
The interrupting rating (expressed in kiloamperes) is a performance specification rather than a classification criterion under SITC 77252 — all automatic circuit breakers for circuits not exceeding 1,000 V fall within this heading regardless of their kA rating. However, the interrupting rating is commercially critical for procurement and may affect which HTS 10-digit subheading applies under the US tariff schedule, so importers should confirm the correct line with a customs broker.
Yes. Both MCCBs and MCBs are automatic circuit breakers and classify within this heading provided their rated voltage does not exceed 1,000 V. The distinction between them is a commercial and engineering one; for tariff purposes, the voltage threshold is the controlling criterion.
Basic heading 93 of 642 in section 7
Basic heading 77252 · $250.6M of $172.0B
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Imports · August 2026
origin
Mexico and Dominican Republic together supply 72% of it. China pays 38.6% duty; Mexico 3.9%.
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
$250.6MYoY · free account
Exports
$110.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $2.5B of Automatic Circuit Breakers (Not Exceeding 1,000 Volts).
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.