Automotive Aftermarket Catalog
Find information about and order replacement Littelfuse fuses, relays, solenoids, connectors and other electronic components for cars and trucks.
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Our ATO(R); automotive circuit breakers are designed to mount in ATO (R); fuse blocks and panels. These blade-style circuit breakers meet OEM requirements and conform to SAE J553 or J553C standards. Our portfolio of ATO® circuit breakers includes both Type 1 automatic reset circuit breakers and Type 2 modified reset circuit breakers that are primarily used as wiring harness protectors in 12 V dc automotive systems.
- Circuit breakers designed to meet OEM requirements
- Options with snap-off terminals work identically to OEM circuit breakers but offer versatility
ATO Parts
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