Part Number 53M-538 having (CAGE Code 21810) and FSC 5925 Circuit Breakers in stock with ready to ship. Get an instant quote for 53M-538 Circuit Breaker Subassembly by Challenger Electrical Equipment. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.