The XB4BS8444 is a complete emergency stop push-button unit from the Harmony XB4 range, designed for critical machine safety applications. It features a robust chromium-plated metal bezel, a 40mm red mushroom head, and mounts into a standard 22.5mm panel cutout. The operator provides trigger action with mechanical latching and is reset by a simple 'turn to release' motion, utilizing two slow-break normally closed (2NC) contacts. This device is rated for a conventional thermal current of 10 A, has a rated insulation voltage of 600 V, and offers high durability with 300,000 mechanical cycles. With high IP (IP66/67/69/69K) and NEMA (4X/13) protection ratings, it is suitable for use in harsh industrial environments where reliable emergency switching is paramount.