{"product_id":"dc-12v-40a-automotive-relay-spdt-4-5-pin-harness-socket","title":"DC 12V 40A Automotive Relay SPDT 4\/5 Pin with Harness Socket","description":"\n\u003ch2\u003eDC 12V 40A Automotive Relay – SPDT 4\/5 Pin with Harness Socket\u003c\/h2\u003e\n\u003cp\u003eKeep your vehicle's electrical systems running smoothly with this reliable \u003cstrong\u003eDC 12V 40A Automotive Relay\u003c\/strong\u003e. Designed for cars, trucks, and other 12V vehicles, this SPDT (Single Pole Double Throw) relay handles high-current switching with ease — making it ideal for car alarm systems, starter circuits, lighting rigs, cooling fans, and more. The included harness socket ensures a clean, secure connection every time.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Voltage:\u003c\/strong\u003e DC 12V — perfect for standard automotive electrical systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 40A — handles high-current loads with confidence\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSPDT Configuration:\u003c\/strong\u003e 4\/5 Pin design for versatile switching applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHarness Socket Included:\u003c\/strong\u003e Pre-wired socket simplifies installation and ensures a solid connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built from sturdy plastic and metal for long-lasting performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Black Design:\u003c\/strong\u003e Low-profile and easy to fit into tight engine bay spaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Compatible with car alarms, starters, horns, headlights, cooling fans, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Car Relay\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Voltage:\u003c\/strong\u003e DC 12V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 40A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Number:\u003c\/strong\u003e 4\/5 Pin (SPDT)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic, Metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEU LVD Voltage:\u003c\/strong\u003e Low Voltage – Below 50VAC or 75VDC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × DC 12V 40A Automotive Relay with Harness Socket\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCar alarm \u0026amp; security system wiring\u003c\/li\u003e\n  \u003cli\u003eStarter circuit upgrades\u003c\/li\u003e\n  \u003cli\u003eAuxiliary lighting (headlights, fog lights, LED bars)\u003c\/li\u003e\n  \u003cli\u003eCooling fans \u0026amp; electric horns\u003c\/li\u003e\n  \u003cli\u003eDIY automotive electrical projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLooking for more handy tools and accessories? Check out our \u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003eSilicone Grease Lubricant for O-Rings\u003c\/a\u003e for connector maintenance, or browse our \u003ca href=\"\/products\/1pc-sheath-fold-knife-plier-bag-pouch-case-sheath-belt-loop-pocket-carry-storage-flashlight-holder-waist-pack\"\u003eKnife \u0026amp; Plier Belt Pouch\u003c\/a\u003e to keep your tools organized on the job.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.fueleconomy.gov\/feg\/drive.shtml\" target=\"_blank\" rel=\"noopener\"\u003eFuelEconomy.gov driving efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does SPDT mean on this automotive relay?\u003c\/h4\u003e\n\u003cp\u003eA: SPDT stands for Single Pole Double Throw. This means the relay has one common terminal that can switch between two circuits — a normally open (NO) and a normally closed (NC) contact — making it highly versatile for automotive switching applications like car alarms, starters, and lights.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this relay come with a harness socket?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The package includes 1 × DC 12V 40A Automotive Relay along with a harness socket, allowing for easy plug-and-play installation without the need for soldering directly to the relay terminals.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this relay compatible with standard 12V vehicle electrical systems?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This relay is rated at DC 12V and 40A, making it fully compatible with the standard 12V electrical systems found in most cars, trucks, motorcycles, and other automotive applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use a 4-pin or 5-pin configuration with this relay?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this relay supports both 4-pin and 5-pin wiring configurations. The 4-pin setup uses the normally open contacts, while the 5-pin setup gives you access to both normally open and normally closed contacts for more advanced switching needs.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does SPDT mean on this automotive relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"SPDT stands for Single Pole Double Throw. This means the relay has one common terminal that can switch between two circuits — a normally open (NO) and a normally closed (NC) contact — making it highly versatile for automotive switching applications like car alarms, starters, and lights.\"}}, {\"@type\": \"Question\", \"name\": \"Does this relay come with a harness socket?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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The 4-pin setup uses the normally open contacts, while the 5-pin setup gives you access to both normally open and normally closed contacts for more advanced switching needs.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/x1davz-b4.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/x1davz-b4.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 12V 40A Automotive Relay SPDT 4\/5 Pin with Harness Socket\", \"item\": \"https:\/\/x1davz-b4.myshopify.com\/products\/dc-12v-40a-automotive-relay-spdt-4-5-pin-harness-socket\"}]}\u003c\/script\u003e","brand":"Nixie","offers":[{"title":"4pin","offer_id":67609675628643,"sku":"1005013136837611-4pin","price":3.72,"currency_code":"USD","in_stock":true},{"title":"5pin","offer_id":67609675661411,"sku":"1005013136837611-5pin","price":3.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/2047\/6003\/files\/S57f15e9cc6c24606b0e7504fc48bf016p.webp?v=1790790937","url":"https:\/\/nixiehaven.com\/products\/dc-12v-40a-automotive-relay-spdt-4-5-pin-harness-socket","provider":"Nixie","version":"1.0","type":"link"}