{"product_id":"bussmann-150a-type-iii-circuit-breaker-flush-mount-waterproof-for-marine-rv","title":"Bussmann 150A Type III Circuit Breaker — Flush-Mount, Waterproof for Marine \u0026 RV","description":"\u003cp\u003e\u003cstrong\u003eThe Bussmann Series CB185 150A Type III is a flush-mount, waterproof high-amperage circuit breaker engineered to protect auxiliary, accessory and multi-battery charging circuits in trucks, RVs, buses and marine craft.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis genuine Bussmann circuit breaker combines a sealed, ignition-protected housing with a robust trip rating to manage heavy auxiliary loads and battery-charging paths. Designed for flush-panel installations, the CB185 Type III fits vehicle and marine control panels while meeting SAE J1171 ignition-protection requirements. It’s commonly used with battery isolators and multi-battery systems to prevent overloads and to protect wiring and components used in demanding transportation and recreational environments.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the CB185 protect my vehicle or boat electrical system?\u003c\/h3\u003e\n\n\u003cp\u003eThe CB185 interrupts excessive current before heat or wiring damage can occur, preserving downstream components and batteries. Its sealed housing and Type III construction are intended for environments where moisture, vibration and exposure are common.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e150A trip rating suited for heavy auxiliary circuits and charge feeds;\u003c\/li\u003e\n  \u003cli\u003eFast response to sustained overloads to limit wiring heating;\u003c\/li\u003e\n  \u003cli\u003eSealed, waterproof enclosure reduces corrosion risk in damp locations;\u003c\/li\u003e\n  \u003cli\u003eIgnition-protected per SAE J1171 to reduce spark\/ignition hazards around fuel systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere is this circuit breaker typically installed and how is it mounted?\u003c\/h3\u003e\n\n\u003cp\u003eThe CB185 is designed for flush-panel mounting in dashboards, equipment panels and switchboards of commercial vehicles, RVs and boats. Its form factor lets it sit neatly in control panels while maintaining accessibility for inspection and reset operations.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFlush-mount face for a low-profile, finished panel appearance;\u003c\/li\u003e\n  \u003cli\u003eCommonly used in auxiliary circuits, battery charging lines and isolator outputs;\u003c\/li\u003e\n  \u003cli\u003eSuitable for trucks, buses, RVs, trailers and marine applications;\u003c\/li\u003e\n  \u003cli\u003ePanel cutout and mounting hardware allow secure installation against vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance and safety standards does the CB185 meet?\u003c\/h3\u003e\n\n\u003cp\u003eThe CB185 adheres to industry safety expectations for ignition protection and marine\/vehicle environments. Its sealed construction and Type III designation make it appropriate where moisture and contaminants are present.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplies with SAE J1171 for ignition protection to reduce spark risk near fuel-air environments;\u003c\/li\u003e\n  \u003cli\u003eWaterproof, sealed housing to resist ingress and corrosion in marine or wet conditions;\u003c\/li\u003e\n  \u003cli\u003eRobust contact and trip mechanism for consistent performance under repeated use;\u003c\/li\u003e\n  \u003cli\u003eManufactured and labeled as a genuine Bussmann part for traceability and quality assurance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I choose the right breaker size and integrate the CB185 with battery isolators?\u003c\/h3\u003e\n\n\u003cp\u003eSelect a breaker rating that matches the maximum expected continuous load plus a margin for startup currents. When used with battery isolators or multi-battery charging systems, place the CB185 on the charge feed or isolator output to protect wiring and batteries from sustained overcurrent.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConfirm 150A rating suits the circuit’s expected peak and continuous currents;\u003c\/li\u003e\n  \u003cli\u003eMatch wiring gauge and conductor insulation to breaker capacity for safe operation;\u003c\/li\u003e\n  \u003cli\u003eLocate breaker close to the battery or charge source to protect the length of conductor;\u003c\/li\u003e\n  \u003cli\u003eCoordinate with isolator wiring so the breaker protects battery and accessory feeds as intended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Bussmann CB185 150A Type III circuit breaker is ideal for fleet technicians, RV owners, marine electricians and DIY vehicle upfitters who need a durable, ignition-protected, flush-mount protective device for high-current auxiliary and charging circuits. If you install or maintain multi-battery systems, battery isolators, or heavy accessory loads on trucks, buses, RVs or boats and require a sealed, panel-mount breaker with recognized ignition-protection compliance, the CB185 is a practical choice.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the CB185 suitable for marine use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The CB185 has a waterproof sealed housing and meets SAE J1171 ignition-protection criteria for marine applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use the CB185 with a battery isolator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is commonly installed on isolator outputs or charge feeds to protect batteries and wiring in multi-battery systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bussmann","offers":[{"title":"Default Title","offer_id":48084756365470,"sku":"B001PYK5NC","price":35.87,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/bussmann-front-panel-view.jpg?v=1785861878","url":"https:\/\/northtrailauto.ca\/products\/bussmann-150a-type-iii-circuit-breaker-flush-mount-waterproof-for-marine-rv","provider":"North Trail Auto","version":"1.0","type":"link"}