Siemens 3TH2153-0BB4 is an eight-pole control relay (Hilfsschütz) from the 3TH2 family, configured with five normally open and three normally closed auxiliary contacts and driven by a 24 V DC coil. It uses screw-terminal connections for the auxiliary/control circuit and is designed for DIN EN 50 011 53E-compliant control panels in industrial automation. This compact relay consolidates multiple control signals in a single device, making it well suited for interlock logic, start/stop signaling, and sequencing tasks within automation systems.
