{"product_id":"dc-12v-24v-100a-200a-4-pin-normally-open-automotive-relay-wm686","title":"DC 12V\/24V 100A–200A 4-Pin Normally Open Car Relay | WM686","description":"\n\u003ch2\u003eZOHMYIY WM686 Heavy-Duty Automotive Relay – Reliable Split Charge \u0026amp; Battery Switch\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eZOHMYIY WM686 Automotive Relay\u003c\/strong\u003e is a compact, high-current 4-pin normally open relay designed for 12V and 24V DC systems. Available in 100A, 120A, and 200A ratings, it's the ideal solution for car starter circuits, battery ON\/OFF switching, split charge systems, and general automotive or industrial electrical control applications. Made in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose the WM686 Relay?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Conductivity Pure Copper Coil:\u003c\/strong\u003e Internal pure copper windings deliver strong conductivity and an impressively low energy loss rate for efficient operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSilver Oxide Steel Contacts:\u003c\/strong\u003e Engineered for long service life, these contacts resist arcing and oxidation even under heavy load switching.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Nylon Shell + Brass Inner Core:\u003c\/strong\u003e The robust nylon housing is heat-resistant and corrosion-resistant, protecting the relay in demanding under-hood environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug \u0026amp; Play Installation:\u003c\/strong\u003e Simple 4-pin normally open design makes wiring straightforward — no specialist tools required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Voltage \u0026amp; Current Options:\u003c\/strong\u003e Choose DC 12V or 24V, and select 100A, 120A, or 200A to match your specific application requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application Range:\u003c\/strong\u003e Suitable for automotive, RV, marine, household appliances, and mechanical automation systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZOHMYIY\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWM686\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V \/ 24V (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100A \/ 120A \/ 200A (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Pins\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally Open (NO)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShell Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNylon\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Core Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSilver Oxide Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × WM686 Automotive Relay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/hex-shank-wire-twister-drill-attachment-rebar-tie-tool\"\u003e1\/4\" Hex Shank Wire Twister Drill Attachment | Rebar Tie Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/adhesive-metal-plates-magnets-self-stick-steel-strips-10-pack\"\u003e10-Pack Adhesive Metal Plates for Magnets – Self-Stick Steel Strips\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-304-stainless-steel-key-rings-2-54cm-flat-split-rings\"\u003e10-Pack 304 Stainless Steel Key Rings – 2.54cm Split Flat Rings\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety \u0026amp; Standards Reference\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety in automotive and industrial wiring, visit \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Standards\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between a 100A, 120A, and 200A relay rating?\u003c\/h4\u003e\n\u003cp\u003eA: The amperage rating indicates the maximum continuous current the relay contacts can safely carry. A 100A relay suits standard car starter and split charge applications, while the 120A and 200A variants are suited for heavier loads such as winches, high-power lighting, or industrial automation equipment. Always select a relay rated at or above your circuit's maximum current draw.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this relay be used for both 12V and 24V systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the WM686 relay is available in both 12V DC and 24V DC coil voltage options. Please select the correct voltage variant to match your vehicle or system's electrical supply when ordering.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does \"normally open\" (NO) mean for this relay?\u003c\/h4\u003e\n\u003cp\u003eA: A normally open relay means the main circuit (load circuit) is open\/disconnected by default when no coil voltage is applied. When the coil receives the rated voltage signal, the contacts close and allow current to flow to the load. This is the standard configuration for automotive starter relays and battery isolator\/split charge circuits.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this relay suitable for a split charge (dual battery) system?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The WM686's high current rating and normally open 4-pin design make it well-suited for dual battery split charge setups in vehicles, campervans, RVs, and marine applications. It allows the secondary battery to charge from the alternator while keeping both batteries isolated when the engine is off.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between a 100A, 120A, and 200A relay rating?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The amperage rating indicates the maximum continuous current the relay contacts can safely carry. A 100A relay suits standard car starter and split charge applications, while the 120A and 200A variants are suited for heavier loads such as winches, high-power lighting, or industrial automation equipment. Always select a relay rated at or above your circuit's maximum current draw.\"}}, {\"@type\": \"Question\", \"name\": \"Can this relay be used for both 12V and 24V systems?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the WM686 relay is available in both 12V DC and 24V DC coil voltage options. Please select the correct voltage variant to match your vehicle or system's electrical supply when ordering.\"}}, {\"@type\": \"Question\", \"name\": \"What does \\\"normally open\\\" (NO) mean for this relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A normally open relay means the main circuit (load circuit) is open\/disconnected by default when no coil voltage is applied. When the coil receives the rated voltage signal, the contacts close and allow current to flow to the load. This is the standard configuration for automotive starter relays and battery isolator\/split charge circuits.\"}}, {\"@type\": \"Question\", \"name\": \"Is this relay suitable for a split charge (dual battery) system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. The WM686's high current rating and normally open 4-pin design make it well-suited for dual battery split charge setups in vehicles, campervans, RVs, and marine applications. It allows the secondary battery to charge from the alternator while keeping both batteries isolated when the engine is off.\"}}]}\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:\/\/0i45ne-c8.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Automotive \u0026 Motorcycle\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/collections\/automotive-motorcycle\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC 12V\/24V 100A–200A 4-Pin Normally Open Car Relay | WM686\", \"item\": \"https:\/\/0i45ne-c8.myshopify.com\/products\/dc-12v-24v-100a-200a-4-pin-normally-open-automotive-relay-wm686\"}]}\u003c\/script\u003e","brand":"Zpaxo","offers":[{"title":"WM-100A12V","offer_id":54190194852150,"sku":"14:10#WM-100A12V","price":13.16,"currency_code":"USD","in_stock":true},{"title":"WM-100A24V","offer_id":54190194884918,"sku":"14:496#WM-100A24V","price":13.13,"currency_code":"USD","in_stock":true},{"title":"WM-120A12V","offer_id":54190194917686,"sku":"14:691#WM-120A12V","price":13.13,"currency_code":"USD","in_stock":true},{"title":"WM-120A24V","offer_id":54190194950454,"sku":"14:771#WM-120A24V","price":13.13,"currency_code":"USD","in_stock":true},{"title":"WM-200A12V","offer_id":54190194983222,"sku":"14:933#WM-200A12V","price":13.13,"currency_code":"USD","in_stock":true},{"title":"WM-200A24V","offer_id":54190195015990,"sku":"14:1052#WM-200A24V","price":13.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7774\/3158\/files\/S1aaa40e1ea1b42c3bc0be6009fd667dfT.webp?v=1783279420","url":"https:\/\/0i45ne-c8.myshopify.com\/products\/dc-12v-24v-100a-200a-4-pin-normally-open-automotive-relay-wm686","provider":"Zpaxo","version":"1.0","type":"link"}