{"product_id":"blue-sea-7315-bss-30a-a-series-circuit-breaker","title":"Blue Sea 7315-BSS 30A A-Series Circuit Breaker","description":"\u003cp class=\"nvn-hero\"\u003eThe Blue Sea Systems 7315-BSS is a 30 amp A-Series circuit breaker built to a military grade standard. Double-pole, magnetic-hydraulic, with a metal toggle actuator and a rating of 277 volts AC and 65 volts DC. It's the kind of breaker you wire into a serious panel and then forget about.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Blue Sea Systems 7315-BSS is a 30 amp A-Series circuit breaker built to a military grade standard. It's a double-pole, magnetic-hydraulic unit with a metal toggle actuator, and it carries a rating of 277 volts AC and 65 volts DC. If you're wiring a demanding marine electrical system and you want a breaker that trips on a real fault and stays put the rest of the time, this is the kind of part that belongs in the panel.\u003c\/p\u003e\n\u003cp\u003eHere's why the magnetic-hydraulic design matters. A thermal breaker reacts to heat, so it can nuisance-trip on a hot engine-room day and its trip point drifts as it ages. This one uses a magnetic coil with a hydraulic delay instead. That means it trips on actual current, not on ambient temperature, and its trip point stays consistent whether it's 40 degrees or 100 degrees in the space behind your dash. On a boat, where the electrical bay bakes in the sun and vibrates all day, that consistency is worth a lot.\u003c\/p\u003e\n\u003cp\u003eThe double-pole part is the other big deal. Two poles let the breaker switch both legs of a circuit at once. On an AC system that means you break the hot and the neutral together, which is exactly what you want on an inspected vessel. On a DC system it lets you protect and isolate both the positive and the return. Either way, one throw of the toggle kills the whole circuit clean.\u003c\/p\u003e\n\u003cp\u003eThis is a COTS (commercial off the shelf) military-grade unit, suitable for use when military specifications are required under CFR 46. That's the federal code covering shipping and inspected commercial vessels. If you're building or refitting a boat that has to pass a Coast Guard inspection, a breaker that already meets that bar saves you headaches down the line. For a recreational boat, it's honestly more breaker than most panels need. But if you want the best part in the box, this is it.\u003c\/p\u003e\n\u003cp\u003eWiring it in is straightforward for anyone comfortable at a panel. It uses #10-32 screw terminals, so you land ring terminals under the screws and torque them down snug. Keep those connections tight. A loose lug on a vibrating boat is where trouble starts. The metal toggle actuator is trip-free, meaning you can't force it closed against a live fault, which is a safety feature you'll appreciate the day you actually need it. Mount it in a standard breaker panel, wire your load, and you're done.\u003c\/p\u003e\n\u003cp\u003eThe 277 volt AC and 65 volt DC ratings tell you this breaker is built for serious systems, not just a simple 12 volt accessory circuit. The 65 volt DC rating covers 12, 24, and 48 volt banks without derating, so it's right at home on larger house banks and lithium setups. The high AC rating suits commercial and inspected-vessel AC distribution. It's a single unit, so order one per breaker position you're filling.\u003c\/p\u003e\n\u003cp\u003eWhere does a breaker like this actually go? Think branch protection on a commercial workboat's AC panel, a main or feeder breaker on an inspected charter vessel, or a heavy DC circuit on a large cruiser running a 24 or 48 volt house bank. Anywhere the load matters and the inspection is real, this is the part that does the job without drama. It's overbuilt for a runabout, and that's fine. Overbuilt is exactly what you want in the one component that stands between a fault and your wiring.\u003c\/p\u003e\n\u003cp\u003eOne more thing worth saying. A breaker like this is only as good as the wire it protects, so size your conductor and your load to the 30 amp rating and you'll get clean, predictable protection for years. We stock the full A-Series range, so if you need a different amperage or a single-pole version for another circuit, we can match it. Wire this one in and forget about it. That's the whole point of buying a breaker built to this standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e30 amp rating for medium-draw AC or DC marine circuits\u003c\/li\u003e\n  \u003cli\u003eDouble-pole design switches both legs of a circuit with a single throw of the toggle\u003c\/li\u003e\n  \u003cli\u003eMagnetic-hydraulic trip mechanism reacts to current, not ambient heat, for consistent trips in hot engine spaces\u003c\/li\u003e\n  \u003cli\u003eRated 277V AC and 65V DC, covering demanding AC distribution and 12, 24, and 48 volt DC banks without derating\u003c\/li\u003e\n  \u003cli\u003eMetal toggle actuator with trip-free operation you can't force closed against a live fault\u003c\/li\u003e\n  \u003cli\u003e#10-32 screw terminals accept standard ring terminals for a secure, serviceable connection\u003c\/li\u003e\n  \u003cli\u003eCOTS military-grade A-Series unit, suitable for use when military specifications are required under CFR 46\u003c\/li\u003e\n  \u003cli\u003eCompact single-unit body mounts in a standard marine breaker panel\u003c\/li\u003e\n  \u003cli\u003eBuilt by Blue Sea Systems for the salt-air marine environment\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 Blue Sea Systems 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 does double-pole mean on this breaker?\u003c\/summary\u003e\n    \u003cp\u003eIt has two poles, so it switches both legs of a circuit at the same time. On an AC circuit you break the hot and neutral together. On a DC circuit you interrupt both the positive and the return. One flip of the toggle isolates the whole circuit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy choose a magnetic-hydraulic breaker over a thermal one?\u003c\/summary\u003e\n    \u003cp\u003eA thermal breaker trips on heat, so it can nuisance-trip on a hot day and its trip point drifts as it ages. This magnetic-hydraulic design trips on actual current instead, and it holds the same trip point whether the space behind your dash is cool or baking. That consistency is why it's the standard on serious marine panels.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does CFR 46 military-grade mean for me?\u003c\/summary\u003e\n    \u003cp\u003eCFR 46 is the federal code covering shipping and inspected commercial vessels. This breaker is a COTS (commercial off the shelf) military-grade unit suitable for use where those specs apply. If your boat has to pass a Coast Guard inspection, using a part that already meets that bar keeps things simple.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use it on both AC and DC systems?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's rated 277 volts AC and 65 volts DC, so it works on AC distribution and DC banks alike. The 65 volt DC rating covers 12, 24, and 48 volt systems without derating.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat wire terminals does it use?\u003c\/summary\u003e\n    \u003cp\u003eIt uses #10-32 screw terminals. You land ring terminals under the screws and torque them down snug. Keep them tight, because a loose lug on a vibrating boat is a common source of trouble.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs 30 amps the right size for my circuit?\u003c\/summary\u003e\n    \u003cp\u003eThat depends on your load and wire gauge. The breaker should protect the wire, so match the amperage to your conductor size and the device you're feeding. If you're not sure, we're happy to help you size it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is trip-free operation?\u003c\/summary\u003e\n    \u003cp\u003eTrip-free means you can't force the toggle closed and hold it against a live fault. If there's a fault, the mechanism trips regardless of the actuator position. It's a safety feature you'll be glad for the day you actually need it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it fit a standard breaker panel?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's a single A-Series unit with a metal toggle actuator that mounts in a standard marine breaker panel. Order one unit per breaker position you're filling.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with a warranty?\u003c\/summary\u003e\n    \u003cp\u003eIt carries the full Blue Sea Systems manufacturer warranty. We're an authorized Blue Sea Systems reseller, so any warranty question runs through us.\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\u003eBlue Sea Systems 7315-BSS A-Series 30A Double-Pole Circuit Breaker\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBlue Sea Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e7315-BSS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e632085073152\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAmperage\u003c\/th\u003e\n\u003ctd\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAC Voltage Rating\u003c\/th\u003e\n\u003ctd\u003e277V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDC Voltage Rating\u003c\/th\u003e\n\u003ctd\u003e65V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePoles\u003c\/th\u003e\n\u003ctd\u003e2 (Double Pole)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCircuit Breaker Type\u003c\/th\u003e\n\u003ctd\u003eMagnetic Hydraulic (Trip-Free)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eActuator Style\u003c\/th\u003e\n\u003ctd\u003eMetal Toggle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTerminal Type\u003c\/th\u003e\n\u003ctd\u003e#10-32 Screw Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eA-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Line\u003c\/th\u003e\n\u003ctd\u003eCOTS Military Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConfiguration\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMilitary Compliance\u003c\/th\u003e\n\u003ctd\u003eSuitable for use when military specifications are required under CFR 46\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 does double-pole mean on this breaker?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It has two poles, so it switches both legs of a circuit at the same time. On an AC circuit you break the hot and neutral together. On a DC circuit you interrupt both the positive and the return. One flip of the toggle isolates the whole circuit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why choose a magnetic-hydraulic breaker over a thermal one?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A thermal breaker trips on heat, so it can nuisance-trip on a hot day and its trip point drifts as it ages. This magnetic-hydraulic design trips on actual current instead, and it holds the same trip point whether the space behind your dash is cool or baking. That consistency is why it's the standard on serious marine panels.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does CFR 46 military-grade mean for me?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"CFR 46 is the federal code covering shipping and inspected commercial vessels. This breaker is a COTS (commercial off the shelf) military-grade unit suitable for use where those specs apply. If your boat has to pass a Coast Guard inspection, using a part that already meets that bar keeps things simple.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use it on both AC and DC systems?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's rated 277 volts AC and 65 volts DC, so it works on AC distribution and DC banks alike. The 65 volt DC rating covers 12, 24, and 48 volt systems without derating.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What wire terminals does it use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It uses #10-32 screw terminals. You land ring terminals under the screws and torque them down snug. Keep them tight, because a loose lug on a vibrating boat is a common source of trouble.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is 30 amps the right size for my circuit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"That depends on your load and wire gauge. The breaker should protect the wire, so match the amperage to your conductor size and the device you're feeding. If you're not sure, we're happy to help you size it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is trip-free operation?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Trip-free means you can't force the toggle closed and hold it against a live fault. If there's a fault, the mechanism trips regardless of the actuator position. It's a safety feature you'll be glad for the day you actually need it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it fit a standard breaker panel?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's a single A-Series unit with a metal toggle actuator that mounts in a standard marine breaker panel. 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