Schmersal NDRZ50RT-2905-1 Emergency Stop Button

The Schmersal NDRZ50RT-2905-1 Emergency Stop Button is a 50 mm red, latching emergency stop pushbutton with a yellow front ring and white bellows, designed for hygienic, high-cleaning environments. It uses a snap-action mechanism with integrated unlocking and supports up to three contact elements, meeting EN 60947-1, EN 60947-5-1, EN 60947-5-5, and ISO 13850 safety standards. The device mounts through a 22.3 mm hole on a 50 x 50 mm mounting footprint with a mounting height of 45 mm and panel thickness compatibility from 1 to 6 mm; tightening torque is 0.6 Nm. Made from ABS for the operator and front ring (chrome-plated ABS) with silicone bellows, its IP67, IP69, and IP69K ratings guard against dust, immersion, and high-pressure washing. The NDRZ50RT-2905-1 supports a maximum switching frequency of 600 operations per hour, a typical actuating force of 25 N, and a mechanical lifetime of about 100,000 operations; it is approved for cULus and carries the material number 103011890 and EAN 4030661480657. This front plate–mount variant is designed for emergency-stop circuits in safety systems and is intended for use in industrial environments where robust washdown resistance and reliable latching behavior are required.