Allen-Bradley 800MS-H31BLAK Selector Switch Maintained

Allen-Bradley 800MS-H31BLAK is a two‑position, maintained selector switch designed for industrial control panels. The unit uses a B cam and locks in the left position with a standard key, providing a maintained state until manually changed. It is a non‑illuminated module with a 22.5 mm mounting hole and large‑screw terminations that accept two #12 AWG conductors, enabling straightforward wiring in control circuits. The switch features 2 positions (2‑position selector switch) and a 1 NO, 1 NC contact configuration, making it suitable for selecting between two discrete operating modes or paths. Its enclosure compatibility includes Type 13 and IEC I44 IP65 oil‑tight environments, which helps it perform reliably in harsh or dirty industrial settings. The 800MS series is built with a plastic/metal actuator construction and is color‑coded as black for the head, matching the H31BLAK designation. With a rugged mechanical design pedigree typical of Allen‑Bradley components, this model supports dependable lockable operation in systems where accidental changes must be prevented. If illumination is required, compatible illuminated variants exist within the broader 800M family, but this specific MS variant provides a straightforward, non‑illuminated two‑position control with a lockable left position.