Siemens 3TK2807-0AL2 Safety Contactor Assembly

Siemens 3TK2807-0AL2 is a safety contactor combination for safety circuits Enabling and Signalling Circuit, designed to consolidate actuation and safety signaling in a single assembly for machine safety systems. Operating from AC 230/220 V, 50/60 Hz, it provides a multi-contact block with five normally open contacts, one normally closed contact, and three normally open contacts with delay, enabling precise sequencing, interlock logic, and fault detection within the safety chain. It is designed to work with Siemens 3SK safety relays, including models such as 3SK1121-1CB42 and 3SK1211-1BW20, delivering integrated safety logic when used as a combined contactor/safety-relay assembly. Common applications include emergency-stop circuits, guarding interlocks, and safety-rated control loops in automated equipment, where this compact assembly reduces wiring complexity, simplifies panel layouts, and maintains reliable performance across safety circuits. This part is described by Siemens as a Contactor Combination for Safety Circuits Enabling and Signalling Circuit and is listed for AC operation at 230/220 V 50/60 Hz.