{"product_id":"sea-dog-sd-87-40a-48v-dc-circuit-breaker-830452","title":"Sea-Dog SD-87 40A 48V DC Circuit Breaker | 830452","description":"\u003cp class=\"nvn-hero\"\u003eThe Sea-Dog SD-87 is a 40-amp resettable circuit breaker built to sit right on your DC panel and protect a heavy circuit up to 48 volts. Manual reset, IP66 sealed against spray, and stud terminals that take a proper ring lug. It's the breaker you reach for when a fuse just won't cut it anymore.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Sea-Dog SD-87 is a panel-mount resettable circuit breaker rated at 40 amps and 48 volts DC. It's the kind of protection you wire in when a circuit pulls too much current to trust to a cheap inline fuse. Windlasses, bow thrusters, inverter feeds, electric reels, trolling motor circuits. Anything that draws hard and occasionally trips deserves a breaker you can reset by hand instead of a fuse you have to dig a spare out for.\u003c\/p\u003e\n\u003cp\u003eIt's a manual reset design. When the breaker trips, a button pops and stays out until you push it back in. No mystery, no hunting through the fuse box in a rolling sea. You see the popped button, you clear the fault, you reset it. That's the whole point of running a breaker over a fuse on a critical circuit.\u003c\/p\u003e\n\u003cp\u003eThe body is sealed to IP66, so it shrugs off deck spray and washdown. That matters if you're mounting it anywhere near an open helm or in a locker that gets damp. The 5\/16 inch-18 stud terminals take a proper ring lug, which is how you want a 40-amp connection made. Crimp your lugs, torque the nuts, and you've got a connection that won't back out with engine vibration.\u003c\/p\u003e\n\u003cp\u003ePanel mounting is straightforward. The breaker drops through a single hole and the stud terminals do the securing from behind. The black plastic housing keeps it low profile on the dash. It meets SAE J553, ABYC-E11, UL1077, and SAE J1171 standards, so it's built to the marine ignition-protection and wiring rules a surveyor cares about.\u003c\/p\u003e\n\u003cp\u003eOne thing to get right before you order: match the amperage to the wire, not the load. A 40-amp breaker protects wiring sized for 40 amps. If you're not sure what gauge you're running or what the circuit actually draws, give us a call and we'll size it with you. Getting this wrong is how you cook a harness, and it's an easy thing to get right up front.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e40 amp rating at 48 volts DC, sized for heavy circuits like windlasses, thrusters, and inverter feeds\u003c\/li\u003e\n  \u003cli\u003eManual reset button pops on a fault and stays out until you clear it and push it back in\u003c\/li\u003e\n  \u003cli\u003eIP66 sealed housing stands up to deck spray and washdown\u003c\/li\u003e\n  \u003cli\u003e5\/16 inch-18 stud terminals take a crimped ring lug for a solid high-current connection\u003c\/li\u003e\n  \u003cli\u003ePanel-mount design drops through a single hole with the studs securing from behind\u003c\/li\u003e\n  \u003cli\u003eMeets SAE J553, ABYC-E11, UL1077, and SAE J1171 marine wiring standards\u003c\/li\u003e\n  \u003cli\u003eBlack plastic housing keeps a low profile on the dash or panel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sea-Dog reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the SD-87 rated for?\u003c\/summary\u003e\n    \u003cp\u003e40 amps at 48 volts DC. It's a resettable breaker, so it protects the circuit and lets you reset by hand instead of swapping a fuse.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it a manual or automatic reset?\u003c\/summary\u003e\n    \u003cp\u003eManual. When it trips, a button pops out and stays out. You clear the fault, then push the button back in to restore the circuit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I mount it at an open helm?\u003c\/summary\u003e\n    \u003cp\u003eYes. The housing is sealed to IP66, so it handles deck spray and washdown. It's a panel-mount breaker that drops through a single hole.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat terminals does it use?\u003c\/summary\u003e\n    \u003cp\u003e5\/16 inch-18 studs. Crimp a ring lug onto your wire, slip it over the stud, and torque the nut down. That's the right way to make a 40-amp connection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it meet marine standards?\u003c\/summary\u003e\n    \u003cp\u003eIt's built to SAE J553, ABYC-E11, UL1077, and SAE J1171. Those are the wiring and ignition-protection standards a surveyor looks for.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I pick the right amperage?\u003c\/summary\u003e\n    \u003cp\u003eSize the breaker to the wire, not the load. A 40-amp breaker protects wiring rated for 40 amps. If you're unsure of your gauge, call us and we'll size it with you.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eSD-87 Resettable Circuit Breaker, 40 Amp, 48 Volt DC, Manual Reset, Panel Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSea-Dog\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e830452\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e035514830539\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eSD-87\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAmperage\u003c\/th\u003e\n\u003ctd\u003e40 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e48 Volt DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReset Type\u003c\/th\u003e\n\u003ctd\u003eManual Reset\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003ePanel Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTerminal\u003c\/th\u003e\n\u003ctd\u003e5\/16 Inch-18 Stud Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProtection Rating\u003c\/th\u003e\n\u003ctd\u003eIP66\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStandards\u003c\/th\u003e\n\u003ctd\u003eSAE J553, ABYC-E11, UL1077, SAE J1171\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003ePlastic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the SD-87 rated for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"40 amps at 48 volts DC. It's a resettable breaker, so it protects the circuit and lets you reset by hand instead of swapping a fuse.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it a manual or automatic reset?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Manual. When it trips, a button pops out and stays out. You clear the fault, then push the button back in to restore the circuit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I mount it at an open helm?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The housing is sealed to IP66, so it handles deck spray and washdown. 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Those are the wiring and ignition-protection standards a surveyor looks for.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I pick the right amperage?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Size the breaker to the wire, not the load. A 40-amp breaker protects wiring rated for 40 amps. If you're unsure of your gauge, call us and we'll size it with you.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sea-Dog","offers":[{"title":"Default Title","offer_id":45067118149725,"sku":"2008936","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_9d24d48b-2d4e-4ae3-885a-d4cbca75c581.png?v=1789658636","url":"https:\/\/nvnmarine.com\/products\/sea-dog-sd-87-40a-48v-dc-circuit-breaker-830452","provider":"NVN Marine","version":"1.0","type":"link"}