Siemens 3TJ 1000-0AF0 is an electromechanical relay with a 2 normally open (NO) and 2 normally closed (NC) contact arrangement. This four-contact configuration provides both NO and NC paths in a single device, enabling mixed-form switching in control circuits while simplifying wiring. As a Siemens industrial relay, it is intended for automation and signaling applications that require reliable isolation and compact packaging.
