Allen-Bradley 800MR-HH2BLA Two Position Round Selector Switch

Allen-Bradley 800MR-HH2BLA is a rugged, two-position round selector switch from the 800MR family designed for panel mounting with a 22.5 mm diameter actuator. This black-knob, left-hand cam switch provides two discrete positions with a single normally open and a single normally closed contact (1NO/1NC) and is configured as a maintained (latching) operator, so it stays in the selected state until cycled again. Built for industrial environments, it is described as oil-tight and suitable for NEMA 13-type enclosures, making it a reliable choice for harsh panels and control cabinets. The HH2BLA variant is commonly used to select operating modes, start/stop control, or simple machine configuration in manufacturing lines and process equipment, offering a compact, proven solution when a robust, non-illuminated operator is required for straightforward, two-position control. Its combination of B cam, durable construction, and 22.5 mm mounting footprint aligns with standard control-panel layouts, enabling straightforward integration into existing 22.5 mm control assemblies and wiring schemes.