{"product_id":"300a-12v-master-battery-disconnect-switch-75920-heavy-duty-high-capacity-amp","title":"300A 12V Master Battery Disconnect Switch 75920 Heavy Duty High Capacity Amp","description":"\u003ch2\u003e300A 12V Master Battery Disconnect Switch for Heavy Duty High Capacity Amp\u003c\/h2\u003e\u003cp\u003eThis 300A 12V master battery disconnect switch handles high electrical loads, providing a reliable way to cut off battery power for maintenance or safety. It is designed for heavy-duty applications where a high-capacity amp rating is essential to manage current flow.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis master battery disconnect switch is a robust 300A 12V unit built to isolate a battery from an electrical system. It serves as a critical safety device, allowing operators to quickly halt power flow to prevent shorts, fires, or parasitic drain. This switch is suited for vehicles, boats, and industrial equipment requiring a high-capacity shutoff.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e300A continuous current rating for heavy-duty electrical systems\u003c\/li\u003e\n\u003cli\u003e12V DC operation compatible with standard automotive and marine electronics\u003c\/li\u003e\n\u003cli\u003eHeavy-duty copper contacts ensure low resistance and reliable conductivity\u003c\/li\u003e\n\u003cli\u003eCompact housing with a manual on\/off knob for clear visual status\u003c\/li\u003e\n\u003cli\u003eHigh-temperature resistant construction for under-hood durability\u003c\/li\u003e\n\u003cli\u003eStandard stud terminals accept common cable lugs for secure connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eIsolates battery power during vehicle storage to prevent drain\u003c\/li\u003e\n\u003cli\u003eProvides emergency shutoff in off-road or race vehicles\u003c\/li\u003e\n\u003cli\u003eDisconnects power for safe electrical system servicing\u003c\/li\u003e\n\u003cli\u003eUsed in marine applications to cut power in emergencies\u003c\/li\u003e\n\u003cli\u003eServes as an anti-theft deterrent by disabling start circuits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e75920\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStud bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e75920\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What gauge wire should I use with this disconnect switch? \u003cstrong\u003eA:\u003c\/strong\u003e For a 300A continuous load, use 4\/0 AWG or larger pure copper cable to handle the current safely. Confirm your wire's ampacity matches the switch rating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can this switch handle starting a diesel engine? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the 300A rating covers the surge current of large starting motors, but you must ensure the battery cables and connections are equally rated. Proper torque on all studs is required to maintain full contact.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Part Outfitters","offers":[{"title":"Default Title","offer_id":46611967967418,"sku":"ZZ3F04455","price":54.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/2476\/1786\/files\/s-l1600_ce1dac3a-8f2d-46ab-9572-d4d5990c9e68.jpg?v=1789012796","url":"https:\/\/partoutfitters.com\/products\/300a-12v-master-battery-disconnect-switch-75920-heavy-duty-high-capacity-amp","provider":"Part Outfitters","version":"1.0","type":"link"}