The Siemens 5ST3010 is a SENTRON auxiliary switch designed to provide remote indication of the operating or fault status of compatible circuit protection devices in electrical distribution and control systems. It features one normally open (1 NO) and one normally closed (1 NC) contact for integration with monitoring circuits, PLCs, and signalling equipment. The auxiliary switch is rated for operation up to 400/440 V AC with a minimum operating voltage of 12 V AC/DC and offers an electrical endurance of up to 20,000 operating cycles. It has an IP20 protection rating, measures 90 x 9 x 70 mm, and accepts conductor sizes from 0.5 to 2.5 mm².
