{"product_id":"blue-sea-7719-bss-ml-solenoid-24v-500a-remote-switch","title":"Blue Sea Systems 7719-BSS ML-Series Solenoid 24V DC 500A","description":"\u003cp class=\"nvn-hero\"\u003eThe Blue Sea Systems 7719-BSS is a 24-volt ML-Series solenoid rated for 500 amps continuous. It lets you connect or isolate a big DC bank right from the helm, with silver alloy contacts built for salt air and an SPDT Contura remote switch in the box. Solid remote battery control for 24-volt boats.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Blue Sea Systems 7719-BSS is a 24-volt DC solenoid from the ML-Series, rated for 500 amps of continuous current. It's the heavy-lifter that connects or isolates a battery bank on command, so you can kill a big DC circuit from the helm instead of crawling back to the battery box to twist a knob. If you run a 24-volt house, thruster, or windlass bank, this is the switch that does the work.\u003c\/p\u003e\n\u003cp\u003eHere's what makes the ML-Series different. ML stands for magnetic latching. The solenoid takes a quick pulse from the remote switch to change state, then holds that position without pulling continuous coil current to stay put. So it isn't sitting there draining your bank all day just to stay closed. For boats that sit on the hook or on a mooring for stretches, that matters.\u003c\/p\u003e\n\u003cp\u003eIt ships with the SPDT Remote Control Contura switch, wired ON-ON, so you get clean control from a panel or dash. The switch drops into a standard Contura opening and gives you a lit rocker you can actually see at night. The contacts inside the solenoid are silver alloy, which holds up better against the pitting and corrosion you get from repeated DC switching in a salt-air environment.\u003c\/p\u003e\n\u003cp\u003eThis is 500 amps continuous, so treat the wiring like it means it. Size your cable for the run and the load. A lot of folks running this near 500 amps go with 4\/0 cable and proper crimped lugs, and undersized lugs are the number one thing we see overheat. Torque the terminals down and check them again after the first few weeks of running, because vibration on a hard-charging boat will back a stud off over time.\u003c\/p\u003e\n\u003cp\u003eMounting matters too. Set it vertical with the terminals accessible and keep it up out of standing bilge water. On a center console where spray finds everything, tuck it into a dry locker or box rather than an open bulkhead. It's built to take vibration, shock, and a marine environment, but no electrical component loves sitting in a puddle.\u003c\/p\u003e\n\u003cp\u003eWhy bother with a remote battery switch at all? Two reasons: safety and convenience. Being able to open the main battery connection from the helm means you can shut down a DC fault fast, and it makes leaving the boat simple. Flip the switch, the bank is isolated, and you're not counting on somebody remembering to reach the battery box. On bigger boats where the batteries live somewhere awkward, that remote control earns its keep every single trip.\u003c\/p\u003e\n\u003cp\u003eOne wiring note worth passing along: protect the control side. The SPDT Contura remote runs the coil, and that control circuit should be fused. Running the remote switch straight to the battery without protection is a good way to cook the switch if something shorts. Keep the control wiring tidy, fused, and separate from the heavy 24-volt cable that carries the actual load.\u003c\/p\u003e\n\u003cp\u003eThe ON-ON actuator on the Contura switch gives you positive two-position control, so there's no ambiguous middle state to guess at. You know at a glance whether the bank is tied in or isolated. That clarity is worth a lot when you're doing a pre-departure check in the dark or handing the boat off to a guest crew who don't know your wiring. Label the switch clearly at the panel and anyone aboard can shut the bank down in a hurry if they need to.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Boats and rigs running 24-volt systems, big house banks, bow thrusters, windlasses, or commercial and offshore setups where you want remote battery isolation. If your boat is 12 volts, this isn't your part. The 24-volt coil in the 7719-BSS is matched to a 24-volt control circuit, and Blue Sea makes a 12-volt version of the same solenoid for those boats. Match the voltage to your system and you're set. Wire it right and it'll quietly do its job for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e24-volt DC coil matched to 24V control circuits for larger house, thruster, and windlass banks\u003c\/li\u003e\n  \u003cli\u003e500-amp continuous current rating for heavy DC switching duty\u003c\/li\u003e\n  \u003cli\u003eSilver alloy contacts resist pitting and corrosion from repeated DC switching in salt air\u003c\/li\u003e\n  \u003cli\u003eML-Series magnetic latching holds position without continuous coil draw\u003c\/li\u003e\n  \u003cli\u003eIncludes an SPDT Remote Control Contura switch wired ON-ON for panel or dash control\u003c\/li\u003e\n  \u003cli\u003eBlack housing built to withstand vibration, shock, and the marine environment\u003c\/li\u003e\n  \u003cli\u003eRemote isolation lets you kill the bank from the helm for safety and easy layup\u003c\/li\u003e\n  \u003cli\u003eStandard Contura switch footprint drops into common marine switch panels\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's the difference between the 7719-BSS and the 12-volt version?\u003c\/summary\u003e\n    \u003cp\u003eThe 7719-BSS runs a 24-volt coil and is matched to a 24-volt control circuit, so it's for boats with 24-volt systems. If your boat is 12 volts, you want the 12-volt version of the same ML-Series solenoid. Both carry the same 500-amp continuous rating.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with the remote switch?\u003c\/summary\u003e\n    \u003cp\u003eYes. It ships with the SPDT Remote Control Contura switch wired ON-ON, so you can control it from a panel or dash right out of the box.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size cable do I need for 500 amps?\u003c\/summary\u003e\n    \u003cp\u003eSize your cable to the load and the length of the run. Boaters running this near its 500-amp rating commonly use 4\/0 cable with properly crimped lugs. Undersized lugs are the most common cause of overheating, so don't skimp there.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it drain my battery while it's engaged?\u003c\/summary\u003e\n    \u003cp\u003eNo. The ML-Series uses magnetic latching, so it takes a pulse to change state and then holds position without pulling continuous coil current. That's a big deal for boats that sit unattended for days.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow should I mount it?\u003c\/summary\u003e\n    \u003cp\u003eMount it vertical with the terminals accessible and keep it up out of standing bilge water. On a wet center console, put it in a dry locker rather than an open bulkhead. It handles vibration, shock, and salt air, but it shouldn't sit in a puddle.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat do the silver alloy contacts buy me?\u003c\/summary\u003e\n    \u003cp\u003eSilver alloy gives you strong conductivity and better resistance to the pitting and corrosion that come from repeatedly making and breaking a DC load in a marine environment. It's the kind of detail that adds years of service life.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShould I fuse the remote switch?\u003c\/summary\u003e\n    \u003cp\u003eYes. Protect the control circuit that runs the coil. Wiring the remote switch straight to the battery without a fuse risks cooking the switch if something shorts. Keep the control wiring fused and separate from the heavy load cable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat kind of loads is it made for?\u003c\/summary\u003e\n    \u003cp\u003eIt's built for remote battery isolation on 24-volt systems: house banks, bow thrusters, windlasses, and commercial or offshore setups where you want to connect or isolate a big DC bank from the helm.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it built for saltwater use?\u003c\/summary\u003e\n    \u003cp\u003eYes. Blue Sea Systems engineers its electrical gear specifically for boats, and this solenoid is rated to withstand vibration, shock, and the marine environment.\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 7719-BSS ML-Series Solenoid 24V DC 500A\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\u003e7719-BSS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e632085077198\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eML-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eSolenoid\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e24 Volt DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eContinuous Current Rating\u003c\/th\u003e\n\u003ctd\u003e500 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eContact Material\u003c\/th\u003e\n\u003ctd\u003eSilver Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Type\u003c\/th\u003e\n\u003ctd\u003eSPDT (Single Pole Double Throw)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRemote Control\u003c\/th\u003e\n\u003ctd\u003eSPDT Contura Switch (Included)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eActuator Type\u003c\/th\u003e\n\u003ctd\u003eON-ON\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  \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 difference between the 7719-BSS and the 12-volt version?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The 7719-BSS runs a 24-volt coil and is matched to a 24-volt control circuit, so it's for boats with 24-volt systems. If your boat is 12 volts, you want the 12-volt version of the same ML-Series solenoid. Both carry the same 500-amp continuous rating.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with the remote switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It ships with the SPDT Remote Control Contura switch wired ON-ON, so you can control it from a panel or dash right out of the box.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size cable do I need for 500 amps?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Size your cable to the load and the length of the run. Boaters running this near its 500-amp rating commonly use 4\/0 cable with properly crimped lugs. Undersized lugs are the most common cause of overheating, so don't skimp there.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it drain my battery while it's engaged?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. The ML-Series uses magnetic latching, so it takes a pulse to change state and then holds position without pulling continuous coil current. That's a big deal for boats that sit unattended for days.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How should I mount it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Mount it vertical with the terminals accessible and keep it up out of standing bilge water. On a wet center console, put it in a dry locker rather than an open bulkhead. It handles vibration, shock, and salt air, but it shouldn't sit in a puddle.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What do the silver alloy contacts buy me?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Silver alloy gives you strong conductivity and better resistance to the pitting and corrosion that come from repeatedly making and breaking a DC load in a marine environment. It's the kind of detail that adds years of service life.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Should I fuse the remote switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Protect the control circuit that runs the coil. Wiring the remote switch straight to the battery without a fuse risks cooking the switch if something shorts. Keep the control wiring fused and separate from the heavy load cable.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What kind of loads is it made for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's built for remote battery isolation on 24-volt systems: house banks, bow thrusters, windlasses, and commercial or offshore setups where you want to connect or isolate a big DC bank from the helm.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it built for saltwater use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Blue Sea Systems engineers its electrical gear specifically for boats, and this solenoid is rated to withstand vibration, shock, and the marine environment.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":45005684408413,"sku":"2007971","price":184.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_042c24f2-7da9-4da6-8a2a-8462df08397f.jpg?v=1788767368","url":"https:\/\/nvnmarine.com\/products\/blue-sea-7719-bss-ml-solenoid-24v-500a-remote-switch","provider":"NVN Marine","version":"1.0","type":"link"}