Designed for mounting on fixed surface/frame with matching 57040 actuator mounted on moving surface/door, magnetically operated Firecracker 59040 Series features crush ribs on capsule and press-fits securely into 3/8 in. dia hole. NO, NC, and change-over contact options are available, and UL-Recognized component offers switching capability up to 200 Vdc/140 Vac at 10 W/VA. Various sensitivity and cable length options are available.