The Leuze S400-M4M12-B is a safety hinge switch designed for integration into control circuits up to category 4, compliant with EN ISO 13849-1. It operates as a locking device without guard interlocking, following EN ISO 14119 standards, and combines a mechanical hinge with an integrated safety switch for seamless functionality. With a mission time of 20 years and a B10d value of 2,000,000 cycles, this switch ensures long-term reliability and durability in safety-critical applications.