Siemens 3TH43 55-0BB4 Control Relay

Siemens 3TH43 55-0BB4 is a ten-pole Hilfsschütz (auxiliary contactor) from the 3TH43 family, delivering a compact, single-unit assembly with five normally open and five normally closed contacts for control circuits. The device uses a DC-operated control coil with 24 V DC supply and comes in a 1U screw-terminal version suitable for tight panel mounting. For load switching, the contacts are rated for AC-15 duty, handling up to 10 A at 230 VAC or 6 A at 400 VAC. Ideal for implementing control logic in industrial automation, it accommodates multi-circuit interlocks and signaling within a single compact relay module, making it a versatile option for PLC interfaces and relay networks.