The Siemens SENTRON 3VA9137-0GX10 is an auxiliary switch module designed as a rotary-operator accessory for 3VA5 molded-case circuit breakers. It provides two leading-to-ON contacts that signal the breaker's closed position, rated for a thermal current of 5 A. The module snaps into the breaker's accessory slot on the panel or enclosure interior, adding remote status indication without increasing the breaker's panel cutout.
Rated at 5 A in AC-12 duty (resistive loads) across 12 V to 240 V, and 2 A in AC-15 duty (inductive loads like contactor coils) across the same voltage range. For DC control circuits, the module switches 0.2 A in DC-13 duty up to 250 V. These ratings define the maximum current the auxiliary contacts can make and break under the stated load types — exceeding them risks contact welding or premature failure. With overvoltage category III and a surge voltage resistance of 4 kV, the module is suited for fixed-installation distribution panels where transient overvoltages from the mains are expected.
Physical fit and environmental range
Dimensions are 45 mm deep, 62.3 mm wide, and 37.35 mm high — the module adds negligible depth to the breaker assembly. Operating temperature spans -40 °C to 80 °C, covering most indoor industrial and outdoor enclosure conditions without derating.