{"product_id":"blue-sea-battery-switch-300a-on-off-w-key-red","title":"Blue Sea 300A Red Mini m-Series On\/Off Battery Switch w\/ Key","description":"\u003ch2\u003eCompact battery isolation for marine, RV and DC power systems\u003c\/h2\u003e\n\u003cp\u003eWhen space is tight but current demands are high, the \u003cstrong\u003eBlue Sea mini m‑Series ON\/OFF battery switch\u003c\/strong\u003e is designed to deliver reliable battery isolation in a compact footprint. It’s a practical choice for boat owners and installers who want a neat, serviceable way to disconnect a battery for maintenance, storage, fault-finding or improved safety—without resorting to oversized switchgear.\u003c\/p\u003e\n\u003cp\u003eRated to handle demanding DC loads, this single-circuit battery isolator suits a wide range of \u003cstrong\u003e12V, 24V and up to 48V DC\u003c\/strong\u003e systems. Use it to control a single battery feeding a single load group such as a house panel, inverter circuit, bow thruster feed, winch circuit (where appropriately engineered), or auxiliary power distribution. For many setups, adding a dedicated isolation point can help reduce the risk of parasitic drain, accidental short circuits during servicing, and confusion when troubleshooting onboard electrics.\u003c\/p\u003e\n\n\u003ch2\u003eKeyed ON\/OFF operation for controlled access\u003c\/h2\u003e\n\u003cp\u003eThis model includes a \u003cstrong\u003eremovable key\u003c\/strong\u003e, giving you a simple way to limit operation when the vessel is unattended or when you want only authorised users to energise critical circuits. It’s also handy in shared-use applications (workboats, club boats, fleet vehicles, camper fit-outs) where consistent procedures matter.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt for marine environments and compliant installation\u003c\/h2\u003e\n\u003cp\u003eBlue Sea Systems components are widely specified in marine electrical builds for their focus on durability and installer-friendly design. This switch is \u003cstrong\u003eignition protected\u003c\/strong\u003e, making it suitable for installation aboard \u003cstrong\u003epetrol-powered boats\u003c\/strong\u003e where electrical equipment must be designed to reduce the likelihood of ignition in fuel vapour environments (install to relevant standards and manufacturer guidance).\u003c\/p\u003e\n\u003cp\u003eThe casing is engineered for flexibility, supporting \u003cstrong\u003esurface mounting\u003c\/strong\u003e as well as \u003cstrong\u003efront or rear panel mounting\u003c\/strong\u003e. Breakout side panels assist with cable access and routing, helping you achieve a cleaner install—particularly valuable in compact battery compartments and console cavities.\u003c\/p\u003e\n\n\u003ch2\u003eDesigned to handle high current in a small package\u003c\/h2\u003e\n\u003cp\u003eDespite its mini format, this switch is designed for substantial current handling, with a \u003cstrong\u003e300A continuous rating\u003c\/strong\u003e (and higher short-duration ratings for intermittent and starting loads). As with any high-current DC switching, final performance depends on correct cable sizing, termination quality, ventilation\/ambient temperature, and overall installation practices.\u003c\/p\u003e\n\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-circuit ON\/OFF battery isolator\u003c\/strong\u003e for one battery to one load group\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable key\u003c\/strong\u003e for controlled access and added security\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition protected\u003c\/strong\u003e for use in petrol-powered marine applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact mini m‑Series body\u003c\/strong\u003e suited to tight installs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile mounting\u003c\/strong\u003e: surface, front panel or rear panel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear contact protection\u003c\/strong\u003e via isolating cover with snap-on sections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBoat battery master isolation (house or auxiliary bank)\u003c\/li\u003e\n\u003cli\u003eCaravan and RV DC isolation point for service and storage\u003c\/li\u003e\n\u003cli\u003eOff-grid DC systems requiring a simple ON\/OFF disconnect\u003c\/li\u003e\n\u003cli\u003eWork vehicles and marine service rigs with controlled power access\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFit it once, service with confidence\u003c\/h2\u003e\n\u003cp\u003eIf you’re upgrading your battery management or adding a proper isolation point to a new build, the Blue Sea mini m‑Series switch offers a professional, space-efficient solution with keyed operation and marine-ready design. Choose this switch to simplify maintenance, improve safety procedures, and keep your DC system organised—then install it as part of a well-designed wiring and protection plan.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":42037159952445,"sku":"BS-6005B","price":57.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-mini-m-series-switch-angled-BS-6005B.png?v=1769645183","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-battery-switch-300a-on-off-w-key-red","provider":"Solar 4 RVs","version":"1.0","type":"link"}