Allen-Bradley 800MR-JH9BLA Selector Switch

The Allen-Bradley 800MR-JH9BLA is a 22.5 mm, three-position selector switch with a black knob, designed for panel mounting in industrial control applications. This non-illuminated unit from the 800MR family uses a spring-return-from-both mechanism (S/R) and a B Cam, delivering a defined three-position sequence for operator control. It provides a single normally open and a single normally closed contact (1NO-1NC), enabling simple signaling or interlock logic in machine circuits, with stab terminals for quick, reliable terminations. The switch is rated for up to 300 V AC and 10 A maximum, suitable for control panels that require robust, 22.5 mm class push-button hardware. The 800MR-JH9BLA's compact form factor makes it a drop-in candidate for standard 22.5 mm cutouts, commonly used in Allen-Bradley installations, and it can be paired with other 800MR components to build compact operator assemblies for start/stop, mode selection, or reset functions. This specific model's 3-position configuration, combined with its 1NO-1NC contacts, provides straightforward wiring schemes while maintaining safety and reliability in automation tasks.