Part Number 687 1 21551 000 012 having (CAGE Code U4290) and FSC 5925 Circuit Breakers in stock with ready to ship. Get an instant quote for 687 1 21551 000 012 Circuit Breaker by G E C Marconi Communications Ltd. 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.