Part Number 0679 0521 having (CAGE Code ZD484) and FSC 5925 Circuit Breakers in stock with ready to ship. Get an instant quote for 0679 0521 Locking Device Circuit Breaker by J Blackwood And Son 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.