{"product_id":"sierra-rk40630b-12v-20a-blue-led-rocker-switch-spst","title":"Sierra RK40630B 12V 20A Blue LED Rocker Switch SPST","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra RK40630B is a 12-volt, 20-amp marine rocker switch with a blue illuminated face and simple SPST on-off action. It's a clean, dependable way to control a single 12-volt circuit at the helm, whether that's cabin lights, a small pump, or an electronics feed, and the blue glow makes it easy to find after dark.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eSierra's RK40630B is a 12-volt, 20-amp rocker switch built for the helm. On-off action, single pole single throw, with a blue illuminated rocker so you can find it in the dark. It's the kind of switch you wire in for cabin lights, a livewell pump, a wash-down, or any accessory circuit that pulls 20 amps or less at 12 volts.\u003c\/p\u003e\n\u003cp\u003eBoaters reach for a switch like this all the time. A new console build, a refit on an older boat, or just replacing a cracked rocker that finally gave up. It's a workhorse part, nothing fancy, and that's exactly the point.\u003c\/p\u003e\n\u003cp\u003eSPST is about as simple as wiring gets. One circuit, on or off. Press the top and the accessory gets power. Press the bottom and it's cut. There's no middle position and no second circuit to keep track of, which makes this a clean choice when all you need is straightforward control of a single load. Sierra builds it to stand up to salt, damp, and vibration, same as the rest of their electrical line.\u003c\/p\u003e\n\u003cp\u003eThe blue illumination is the part you'll appreciate at night. Running back to the dock with the cabin dark, a lit rocker tells you at a glance what's on and what's off. The lamp lights up when the switch is on. Like most illuminated rockers, it needs a ground connection for the light in addition to the load wires, so plan for that extra wire when you're working behind the dash.\u003c\/p\u003e\n\u003cp\u003eSize the rest of the circuit to the switch. That 20-amp rating is the ceiling, so keep your load comfortably under it and you've got headroom to spare. Match the wire gauge to the current and the length of the run, and put a fuse or a breaker on the circuit ahead of the switch. Tinned marine wire is worth the extra cost out here. For an inductive load like a pump or a blower, a lot of folks add a diode across the load to protect the contacts from arcing. And if the switch lives somewhere it'll catch spray, a rubber boot over the rocker keeps water out of the works.\u003c\/p\u003e\n\u003cp\u003eBehind the dash, an illuminated rocker carries the switched load plus a feed for its lamp, so you'll be landing a few spade terminals rather than just two. Slip on heat-shrink connectors, label each lead as you go, and you'll thank yourself the next time you're troubleshooting by flashlight in a rolling anchorage.\u003c\/p\u003e\n\u003cp\u003eThis is a general-purpose accessory switch. It's happy running lights, small pumps, electronics power, and similar 12-volt loads. What it isn't is a heavy-surge switch for big motors or anything drawing more than 20 amps. If your accessory pulls more than that, don't push the switch past its rating. Wire in a relay and let this rocker trigger it instead of carrying the full current itself. Your switch lasts longer and your wiring stays cooler.\u003c\/p\u003e\n\u003cp\u003eSierra's been supplying OEM engine builders and boat manufacturers for years, and their electrical parts are engineered to meet or exceed the original equipment they replace. So whether you're rewiring a tired panel or building a new one from scratch, this is a switch you can trust to keep doing its job season after season.\u003c\/p\u003e\n\u003cp\u003eIf you ever need to feed two circuits or want a center-off position, Sierra makes this same rocker in an on-off-on layout. This RK40630B is the straight on-off version, single pole single throw, which is what most accessory circuits actually call for. Keep it simple where you can.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward. The rectangular rocker drops into a standard rectangular panel opening. If you're swapping out an old switch, measure your existing cutout and dry-fit before you commit so you're not surprised at the dash. The black housing keeps a low profile next to your other controls. Out in the salt, wipe the face down now and then, keep the connections clean and tight behind the panel, and this little switch will outlast plenty of the gear it controls.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e12 volt DC operation, wired for standard marine electrical systems\u003c\/li\u003e\n  \u003cli\u003e20 amp current rating handles lights, small pumps, and most 12V accessory loads\u003c\/li\u003e\n  \u003cli\u003eSingle pole single throw (SPST) on-off action for simple one-circuit control\u003c\/li\u003e\n  \u003cli\u003eBlue LED illumination makes the switch easy to find and read at night\u003c\/li\u003e\n  \u003cli\u003eRectangular rocker drops into a standard rectangular panel opening\u003c\/li\u003e\n  \u003cli\u003eBlack housing keeps a low profile next to your other helm controls\u003c\/li\u003e\n  \u003cli\u003eRocker actuation gives a positive, glove-friendly on\/off feel\u003c\/li\u003e\n  \u003cli\u003eBuilt to Sierra's meet-or-exceed-OE standard for the 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 Sierra Marine 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 SPST mean on this switch?\u003c\/summary\u003e\n    \u003cp\u003eSingle pole single throw. In plain terms, it controls one circuit and does one job, on or off. Press the top for power, the bottom to cut it. There's no center position and no second circuit, which is exactly what most accessory wiring needs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat can I run on a 20 amp switch?\u003c\/summary\u003e\n    \u003cp\u003eAny 12-volt accessory that draws 20 amps or less. Think cabin and courtesy lights, a livewell or washdown pump, electronics power, and similar loads. Keep the draw comfortably under the rating and you've got headroom for the switch to run cool.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use it to switch a bilge blower or a big motor?\u003c\/summary\u003e\n    \u003cp\u003eFor anything that pulls more than 20 amps, or has a heavy startup surge, wire in a relay and let this rocker trigger it. That way the switch handles a small control current instead of carrying the full load, and it lasts a lot longer.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the blue light stay on all the time?\u003c\/summary\u003e\n    \u003cp\u003eThe lamp lights when the switch is on. Because it's an illuminated rocker, it needs a ground connection for the light in addition to the load wires, so plan for that extra lead behind the panel.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat wire and fuse should I use?\u003c\/summary\u003e\n    \u003cp\u003eMatch your wire gauge to the current and the length of the run, and always fuse or breaker the circuit ahead of the switch. Tinned marine wire holds up best in the salt. Sizing depends on your specific load, so follow standard marine wiring practice for that circuit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it fit my existing panel?\u003c\/summary\u003e\n    \u003cp\u003eIt's a standard rectangular rocker, so it drops into a rectangular panel opening. If you're replacing an old switch, measure your existing cutout and dry-fit before you commit so there are no surprises at the dash.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it okay at an exposed helm that catches spray?\u003c\/summary\u003e\n    \u003cp\u003eA rocker switch belongs behind a bit of shelter when you can manage it. For a spot that catches spray, add a rubber boot over the rocker to keep water out of the contacts. Keep the terminals clean and tight behind the panel too.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a 12-volt only switch?\u003c\/summary\u003e\n    \u003cp\u003eYes, it's rated for 12 volt DC systems. Stick with 12-volt circuits and keep the load at or under 20 amps and it'll give you dependable service.\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\u003eOn-Off, 12 Volt DC, 20 Amp, Rocker Switch, Rectangular, Blue Illuminated, Black, Single Pole Single Throw (SPST)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eRK40630B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e808282381004\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eKeystone Part Number\u003c\/th\u003e\n\u003ctd\u003eS5MRK40630B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Action\u003c\/th\u003e\n\u003ctd\u003eOn-Off\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e12 Volt DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCurrent Rating\u003c\/th\u003e\n\u003ctd\u003e20 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Type\u003c\/th\u003e\n\u003ctd\u003eRocker Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSwitch Shape\u003c\/th\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIllumination\u003c\/th\u003e\n\u003ctd\u003eBlue Illuminated\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHousing Color\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCircuit Configuration\u003c\/th\u003e\n\u003ctd\u003eSingle Pole Single Throw (SPST)\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 SPST mean on this switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Single pole single throw. In plain terms, it controls one circuit and does one job, on or off. Press the top for power, the bottom to cut it. There's no center position and no second circuit, which is exactly what most accessory wiring needs.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What can I run on a 20 amp switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Any 12-volt accessory that draws 20 amps or less. Think cabin and courtesy lights, a livewell or washdown pump, electronics power, and similar loads. Keep the draw comfortably under the rating and you've got headroom for the switch to run cool.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use it to switch a bilge blower or a big motor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"For anything that pulls more than 20 amps, or has a heavy startup surge, wire in a relay and let this rocker trigger it. That way the switch handles a small control current instead of carrying the full load, and it lasts a lot longer.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does the blue light stay on all the time?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The lamp lights when the switch is on. Because it's an illuminated rocker, it needs a ground connection for the light in addition to the load wires, so plan for that extra lead behind the panel.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What wire and fuse should I use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Match your wire gauge to the current and the length of the run, and always fuse or breaker the circuit ahead of the switch. Tinned marine wire holds up best in the salt. Sizing depends on your specific load, so follow standard marine wiring practice for that circuit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it fit my existing panel?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a standard rectangular rocker, so it drops into a rectangular panel opening. If you're replacing an old switch, measure your existing cutout and dry-fit before you commit so there are no surprises at the dash.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it okay at an exposed helm that catches spray?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A rocker switch belongs behind a bit of shelter when you can manage it. For a spot that catches spray, add a rubber boot over the rocker to keep water out of the contacts. Keep the terminals clean and tight behind the panel too.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a 12-volt only switch?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, it's rated for 12 volt DC systems. Stick with 12-volt circuits and keep the load at or under 20 amps and it'll give you dependable service.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45075420643421,"sku":"2009604","price":31.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_0337e87c-db9e-4239-85ea-4f86b402edc9.jpg?v=1789840204","url":"https:\/\/nvnmarine.com\/products\/sierra-rk40630b-12v-20a-blue-led-rocker-switch-spst","provider":"NVN Marine","version":"1.0","type":"link"}