Allen-Bradley 802BA290021700 Snap Action Switch

Allen-Bradley 802BA290021700 Snap Action Switch is a compact limit switch from the 802B family designed for precise, rapid position sensing in industrial control panels. This 802B model belongs to the Precision/compact line that uses snap-action contacts for decisive actuation, typically configured as SPDT Form C (one normally open and one normally closed) to provide a controlled change of state. The switch is built for panel or surface mounting and is offered with a range of actuators, including top push and roller lever options, enabling reliable actuation from minimal travel or varied mechanical motion. The 802B family supports multiple enclosure configurations to suit harsh or demanding environments, with approvals and mounting options commonly including NEMA 1, 3, 4, 6, 12, 13 and IP67 variants for sealing and protection. Typical applications include end-of-travel sensing on conveyors, machine safety interlocks, limit detection on presses and packaging equipment, and general position monitoring in automation systems.