{"product_id":"dual-battery-isolator-relay-4-pin-120a-200a-12v-24v-circuit-switch","title":"Dual Battery Isolator Relay 4-Pin 120A 200A 12V 24V Switch","description":"\n\u003ch2\u003eDual Battery Isolator Relay – 4-Pin | 120A \u0026amp; 200A | 12V\/24V DC\u003c\/h2\u003e\n\u003cp\u003eKeep your vehicle's electrical system protected and fully under control with this heavy-duty \u003cstrong\u003eDual Battery Isolator Relay\u003c\/strong\u003e. Designed for automotive and marine applications, this 4-pin sealed relay allows you to separate, isolate, or switch between dual battery banks — preventing drain, protecting your main battery, and giving you reliable control over your vehicle's power circuit.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Capacity Current Handling:\u003c\/strong\u003e Available in 120A and 200A ratings to suit a wide range of vehicle setups, from daily drivers to heavy-duty rigs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Supports both \u003cstrong\u003eDC 12V and 24V\u003c\/strong\u003e systems, making it suitable for cars, trucks, RVs, boats, and commercial vehicles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSealed Construction:\u003c\/strong\u003e Fully sealed housing protects internal contacts from moisture, dust, and vibration — built to last in demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtreme Temperature Range:\u003c\/strong\u003e Rated for operation from \u003cstrong\u003e-40°C to +85°C\u003c\/strong\u003e, ensuring reliable performance in all climates.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Materials:\u003c\/strong\u003e Constructed from high-quality plastic and metal components for long service life and consistent performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Pin Design:\u003c\/strong\u003e Standard conversion contact form (1 normally open) for straightforward integration into your vehicle's electrical system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Compact, plug-and-play design makes it simple to install in your engine bay or electrical panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\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\u003eRated Voltage:\u003c\/strong\u003e DC 12V \/ 24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Current:\u003c\/strong\u003e 120A \/ 200A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Form:\u003c\/strong\u003e Conversion type (1 normally open)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtective Features:\u003c\/strong\u003e Sealed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Automotive \/ Vehicle Control Unit\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 × Dual Battery Isolator Relay (4-Pin)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCars, trucks, SUVs, and vans with dual battery setups\u003c\/li\u003e\n  \u003cli\u003eRVs and campervans needing auxiliary battery isolation\u003c\/li\u003e\n  \u003cli\u003eMarine and boat electrical systems\u003c\/li\u003e\n  \u003cli\u003eOff-road and 4WD vehicles with winches or accessory loads\u003c\/li\u003e\n  \u003cli\u003eCommercial vehicles and fleet electrical management\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\/0-50-psi-dial-tire-pressure-gauge-car-motorcycle-bike\"\u003e0–50 PSI Dial Tire Pressure Gauge – Car, Motorcycle \u0026amp; Bike\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-pin-pre-wired-glow-plug-connector-vw-audi-bmw-fiat-ford-55200755\"\u003e1-Pin Pre-Wired Glow Plug Connector | VW Audi BMW Fiat Ford\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-5l-electric-high-pressure-foam-sprayer-portable-car-wash-gun\"\u003e1.5L Electric Foam Sprayer – Portable High-Pressure Car Wash Gun\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general guidance on automotive electrical safety and wiring standards, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a dual battery isolator relay and why do I need one?\u003c\/h4\u003e\n\u003cp\u003eA: A dual battery isolator relay is an electromagnetic switch that separates two battery banks in a vehicle's electrical system. It ensures that your auxiliary battery (used for accessories like winches, lights, or camping gear) doesn't drain your main starting battery, keeping your vehicle ready to start at all times.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this relay compatible with both 12V and 24V vehicles?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This isolator relay supports both DC 12V and DC 24V systems, making it compatible with a wide range of vehicles including passenger cars, trucks, RVs, boats, and commercial vehicles.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between the 120A and 200A versions?\u003c\/h4\u003e\n\u003cp\u003eA: The current rating determines how much electrical load the relay can safely handle. The 120A version is suitable for most standard dual-battery setups, while the 200A version is recommended for heavy-duty applications such as large winches, inverters, or high-draw auxiliary equipment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this relay waterproof or sealed?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, the relay features a sealed construction that protects internal contacts from moisture, dust, and vibration — making it suitable for engine bay mounting and outdoor or marine environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How difficult is it to install this isolator relay?\u003c\/h4\u003e\n\u003cp\u003eA: Installation is straightforward thanks to the standard 4-pin conversion contact design. Most users with basic automotive electrical knowledge can install it without professional assistance. Always disconnect your battery before installation and refer to your vehicle's wiring diagram for best results.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a dual battery isolator relay and why do I need one?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A dual battery isolator relay is an electromagnetic switch that separates two battery banks in a vehicle's electrical system. It ensures that your auxiliary battery (used for accessories like winches, lights, or camping gear) doesn't drain your main starting battery, keeping your vehicle ready to start at all times.\"}}, {\"@type\": \"Question\", \"name\": \"Is this relay compatible with both 12V and 24V vehicles?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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