Siemens 3TH43 82-0AC2 Control Relay

Siemens 3TH43 82-0AC2 Control Relay is a high-density auxiliary switching device from the SIRIUS 3TH family, designed for compact control circuits in automation panels. It delivers ten fixed contacts: eight normally open (NO) and two normally closed (NC), allowing multiple signaling and interlocking paths to be driven from a single relay. The unit uses a 24 V AC coil (suffix 0AC2) and operates on standard AC power at 50/60 Hz, enabling reliable actuation from common mains supplies. This screw-terminal variant provides secure, vibration-resistant wiring suitable for panel installations where wiring stability and quick servicing matter. In addition to consolidating multiple control functions in one compact module, the 3TH43 82-0AC2 supports efficient wiring and diagnostics within a Siemens 3TH control-relay lineup, making it a practical choice for applications such as ladder logic signaling, sequencing of auxiliary relays and contactors, feedback loops, and interlock schemes in industrial equipment.