Blue Sea Systems m-Series Mini Battery Switches & Keys

The Blue Sea Systems m-Series mini battery switch family includes single-circuit ON/OFF switches, 3- and 4-position selectors, dual-circuit and Dual Circuit Plus models plus replacement keys and knobs. Designed for marine and RV battery management, these ignition-protected switches offer multiple mounting options (surface, front-panel or rear-panel), isolating snap-on covers to protect rear contacts, and long one-piece tin-plated copper terminal studs that accept 3/8\" (M10) ring terminals and multiple cable terminations. Selector and Dual Circuit Plus designs use make-before-break contacts or combine functions to switch or cross-connect battery banks without interrupting power. Construction uses non-corrosive marine-grade metals, reinforced polycarbonate housings and stainless flange nuts or secure terminal hardware where specified. Typical continuous current capability observed across models is 300A; replacement keys and knobs are available for service/security.

• Fit Type: Universal Fit