Square D B51L FJ 9007 Limit Switch

Square D B51L FJ 9007 Limit Switch is a rugged industrial end-of-travel sensor from the Square D 9007 family, pairing a B51L body with an FJ actuator head for reliable actuation in machines and automation lines. It is rated for up to 600 VAC and 10 A, enabling it to switch control circuits and provide signal or interlock outputs on conveyors, presses, and other equipment. The 9007 series is designed for heavy-duty use with snap-action contacts and a versatile enclosure that supports multiple mounting and actuator options. The B51L/FJ variant is intended for environments where a robust, plug-in style limit switch is required, delivering repeatable performance under frequent cycling. Typical applications include end-of-travel sensing on linear actuators, machine feed controls, and safety interlocks in industrial automation. The combination of the B51L housing with the FJ actuator lets technicians install the device in standard control cabinets or on machine frames and connect it to common control wiring through standard terminal arrangements, helping ensure dependable signal actuation and machine shutoffs when travel limits are reached.