The Siemens 3SB3000-0BA31 safety switch is a single-phase emergency stop system with a built-in relay. It features a lockable mushroom-head emergency stop pushbutton and is UL, CSA, and EN approved. This 3-pole, normally-open switch serves as a reliable emergency stop switch for protecting workers from hazardous operations. It is suitable for use in UL/IEC/EN 60947-5-1 applications, such as machinery safety stop and emergency stop systems. This switch has a rated current of 16A, a rated voltage of 400V, and a mechanical life of 5 million operations. It is IP-65 water jet protected and protected against solid objects larger than 12.5mm. With its robust construction, the 3SB3000-0BA31 is the ideal choice for reliable and safe emergency stop systems.