1N4001S-1N4007S are 1.0 amp silicon rectifiers with low forward voltage drop, high current, high reliability, high surge current capability, plastic molded case, UL 94V-0 rated flame retardant epoxy, axial leads, soldered per MIL-STD-202, method 208 guaranteed polarity, color band denotes cathode end, any mounting position, weight 0.34 grams.