{"product_id":"wm686-4-pin-relay-12v-24v-100a-200a-car-starter-split-charge","title":"WM686 4-Pin Relay 12V 24V 100A–200A Car Starter Switch","description":"\u003ch2\u003eWM686 High-Current Relay – 4-Pin Normally Open | 12V \u0026amp; 24V Compatible\u003c\/h2\u003e\n\u003cp\u003eUpgrade your vehicle's electrical system with the \u003cstrong\u003eWM686 4-Pin Normally Open Relay\u003c\/strong\u003e. Designed for 12V and 24V DC systems, this heavy-duty relay handles up to 200A of continuous current, making it ideal for car starters, split-charge setups, battery isolators, and high-draw accessory switching. Whether you're wiring a second battery, protecting your starter circuit, or managing high-amperage loads, the WM686 delivers reliable, consistent switching performance.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Works seamlessly with 12V and 24V DC electrical systems — perfect for cars, trucks, vans, RVs, and marine applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Current Capacity:\u003c\/strong\u003e Available in 100A, 120A, and 200A ratings to match your specific circuit requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Nylon shell paired with a brass inner core delivers excellent heat resistance and corrosion resistance for long-lasting performance in demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Pin Normally Open Design:\u003c\/strong\u003e Clean, straightforward wiring — the circuit opens at rest and closes when energized, giving you precise control over high-amperage loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Space-Saving:\u003c\/strong\u003e Low-profile form factor fits easily into tight engine bays or under-dash installations without crowding other components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReady to Install:\u003c\/strong\u003e Works right out of the box — no complicated programming or additional hardware required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable in 6 Color Options:\u003c\/strong\u003e Choose a color to help organize and identify your relay circuits at a glance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e DC 12V \/ 24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 100A \/ 120A \/ 200A (select your option)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePin Configuration:\u003c\/strong\u003e 4-Pin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Type:\u003c\/strong\u003e Normally Open (NO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Nylon Shell + Brass Inner Core\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e WM686\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCar, truck \u0026amp; SUV starter circuits\u003c\/li\u003e\n  \u003cli\u003eSplit-charge \/ dual-battery systems\u003c\/li\u003e\n  \u003cli\u003eBattery isolators \u0026amp; battery management\u003c\/li\u003e\n  \u003cli\u003eHigh-draw winch, lighting \u0026amp; accessory switching\u003c\/li\u003e\n  \u003cli\u003eRV, marine \u0026amp; off-road electrical systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor guidance on safe automotive electrical wiring and component installation, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer safety resources.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What vehicles and systems is the WM686 4-Pin Relay compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The WM686 relay is compatible with any DC 12V or 24V electrical system, including cars, trucks, SUVs, vans, RVs, and marine vessels. Its broad voltage range makes it a versatile choice for both standard passenger vehicles and larger commercial or recreational setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does \"normally open\" mean for this relay?\u003c\/h4\u003e\n\u003cp\u003eA: A normally open (NO) relay means the circuit is open (disconnected) in its default resting state. When the relay coil is energized — typically by a small trigger signal — the internal contact closes, completing the high-current circuit. This design is ideal for starter circuits and accessory switching where you want the high-amperage load off by default.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What materials make the WM686 relay durable enough for engine-bay use?\u003c\/h4\u003e\n\u003cp\u003eA: The WM686 features a nylon outer shell that resists heat and impact, combined with a brass inner core that provides excellent conductivity and resistance to corrosion. Together, these materials ensure the relay holds up reliably under the high temperatures and vibration typical of an engine-bay environment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this relay for a split-charge or dual-battery system?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The WM686's high current rating (up to 200A) and normally open configuration make it well-suited for split-charge and dual-battery installations. It can efficiently manage the charge flow between your primary and secondary batteries without voltage drop issues common to lower-rated relays.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What vehicles and systems is the WM686 4-Pin Relay compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The WM686 relay is compatible with any DC 12V or 24V electrical system, including cars, trucks, SUVs, vans, RVs, and marine vessels. Its broad voltage range makes it a versatile choice for both standard passenger vehicles and larger commercial or recreational setups.\"}}, {\"@type\": \"Question\", \"name\": \"What does \\\"normally open\\\" mean for this relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A normally open (NO) relay means the circuit is open (disconnected) in its default resting state. When the relay coil is energized — typically by a small trigger signal — the internal contact closes, completing the high-current circuit. This design is ideal for starter circuits and accessory switching where you want the high-amperage load off by default.\"}}, {\"@type\": \"Question\", \"name\": \"What materials make the WM686 relay durable enough for engine-bay use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The WM686 features a nylon outer shell that resists heat and impact, combined with a brass inner core that provides excellent conductivity and resistance to corrosion. Together, these materials ensure the relay holds up reliably under the high temperatures and vibration typical of an engine-bay environment.\"}}, {\"@type\": \"Question\", \"name\": \"Can I use this relay for a split-charge or dual-battery system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The WM686's high current rating (up to 200A) and normally open configuration make it well-suited for split-charge and dual-battery installations. It can efficiently manage the charge flow between your primary and secondary batteries without voltage drop issues common to lower-rated relays.\"}}]}\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:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Car \u0026 Auto Accessories\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/car-auto-accessories\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"WM686 4-Pin Relay 12V 24V 100A–200A Car Starter Switch\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/wm686-4-pin-relay-12v-24v-100a-200a-car-starter-split-charge\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"WM-120A24V","offer_id":49780084932822,"sku":"14:771#WM-120A24V","price":24.13,"currency_code":"USD","in_stock":true},{"title":"WM-120A12V","offer_id":49780084965590,"sku":"14:691#WM-120A12V","price":24.13,"currency_code":"USD","in_stock":true},{"title":"WM-100A24V","offer_id":49780084998358,"sku":"14:496#WM-100A24V","price":24.13,"currency_code":"USD","in_stock":true},{"title":"WM-100A12V","offer_id":49780085031126,"sku":"14:10#WM-100A12V","price":24.13,"currency_code":"USD","in_stock":true},{"title":"WM-200A24V","offer_id":49780085063894,"sku":"14:1052#WM-200A24V","price":24.13,"currency_code":"USD","in_stock":true},{"title":"WM-200A12V","offer_id":49780085096662,"sku":"14:933#WM-200A12V","price":24.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/S08f69a63fb9047d0bf435da12cb45348n.webp?v=1785339474","url":"https:\/\/qmeboost.com\/products\/wm686-4-pin-relay-12v-24v-100a-200a-car-starter-split-charge","provider":"Qme","version":"1.0","type":"link"}