Circuit breaker, LA, 400A, 3 pole, 600VAC, 22kA, 250VDC, 10kA, lugs, walking beam

Square D LA molded case circuit breakers provide thermal magnetic protection. Their primary function is automatic opening of a circuit under overload or short circuit conditions or manual opening. LA circuit breakers contain thermal (overload) and magnetic (short circuit) sensing elements in each pole. Push-to-Trip allows the circuit breaker to be manually tripped without exposure to live parts. This Square D LA molded case circuit breaker is a 3 pole unit mount breaker, 400A and 600VAC. The thermal magnetic circuit breaker has an interrupting rating of 22kA for 600VAC and 10kA for 250VDC. The circuit breaker WB suffix indicates a walking beam interlock system. LA breakers are UL 489, CSA, IEC certified.