SAE Standards Works
Truck and Bus Electrical Systems Committee
J553 - Circuit Breakers
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This SAE Standard defines the test conditions, procedures and performance requirements for circuit breakers in ratings up to and including 50A. The document includes externally or internally mounted automatic reset, modified reset, and manually reset types of circuit breakers for 12V and 24V DC operation. Some circuit breakers may have dual voltage ratings (AC and DC), however, this document evaluates DC performance only.