Part Number ER420DYM4-12B SQ Rf Relay in stock with ready to ship. Get an instant quote for Teledyne Electronics part number ER420DYM4-12B SQ by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for ER420DYM4-12B SQ. Our dedicated account manager will get back to you within 15 minutes.