It is designed to extend the control-circuit switching capacity of a main contactor or to build interlocking logic in a motor control center. The S00 frame size matches the smallest Siemens contactor footprint, so it mounts directly alongside or on top of a S00 power contactor without extra panel space.
Each contact is rated 10 A in AC-12 duty (resistive control loads) at 24 V, and derates to 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. The AC-12 rating is the relevant one for switching solenoid valves, relay coils, and PLC inputs — not motor currents.
The front face carries IP20 finger protection; the sides and back rely on the enclosure for protection.
Wire termination and panel fit
The screw terminals accept two conductors per clamp: 0.5 to 1.5 mm², 0.75 to 2.5 mm², or a single 4 mm². The 45 mm width and 57.5 mm height match the S00 contactor envelope; the 72 mm depth leaves clearance for front-accessible wiring. At 2 000 m maximum operating altitude, no derating is needed for most sites.
Environmental limits and mechanical life
Shock resistance is 10g at 5 ms and 5g at 10 ms, which covers normal shipping and panel-door impacts. The typical mechanical life of the S00 contactor family is 30 million operations — the auxiliary block shares that endurance when switched unloaded or within its rated current.