Schneider Electric Telemecanique XB4-BT845 Push Button

The Schneider Electric Telemecanique XB4-BT845 is a 22 mm emergency stop pushbutton with a 40 mm red mushroom head, mechanical latching action, and a push-pull reset that remains engaged until manually released. It uses one normally open plus one normally closed contact (contact operation: slow-break) and is wired via screw clamp terminals for secure panel connections. This Harmony XB4 device, manufacturer part XB4BT845, comes with a chromium-plated metal bezel and a Zamak fixing collar, designed for 47 × 40 × 82 mm mounting, and a 22 mm mounting diameter. The operator is red, with a trigger action and mechanical latching to ensure a deliberate reset, delivering IP66 protection and a mechanical durability of 300,000 operating cycles. Common applications include control panels, machine tools, conveyor systems, packaging machinery, material handling equipment, and production lines where immediate, manual emergency stopping of industrial machinery is required for personnel and equipment safety.