{"product_id":"blue-sea-70a-187-series-panel-mount-thermal-circuit-breaker","title":"Blue Sea 70A 187-Series Panel Mount Thermal Circuit Breaker","description":"\u003ch2\u003eHeavy-Duty DC Circuit Protection and Manual Switching for Marine and Off-Grid Systems\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 70A Panel Mount Thermal Circuit Breaker\u003c\/strong\u003e delivers dual-function capability by combining reliable overcurrent protection and manual circuit switching into a single, compact device. Designed for demanding electrical environments, this \u003cstrong\u003e70A circuit breaker\u003c\/strong\u003e eliminates the need for separate switches and fuse holders, streamlining your electrical board while saving valuable installation space. Whether you are outfitting a commercial vessel, upgrading a 4WD dual-battery system, or building an off-grid caravan power setup, the 187-Series provides dependable management for high-amperage DC loads.\u003c\/p\u003e\n\u003cp\u003eEngineered to handle systems up to a maximum voltage rating of 48V DC, this unit is highly versatile and suitable for 12V, 24V, and 48V battery banks. The recessed mounting holes and flush panel-mount profile ensure a clean, professional finish on dashboards, control panels, and inside power distribution enclosures.\u003c\/p\u003e\n\n\u003ch3\u003eEngineered for Safety: Trip-Free and Ignition Protected\u003c\/h3\u003e\n\u003cp\u003eIn high-current DC systems, equipment failure or short circuits can present significant hazards. The Blue Sea 187-Series mitigates these risks through a dedicated \u003cstrong\u003etrip-free mechanism\u003c\/strong\u003e. This critical safety feature ensures the internal contacts cannot be manually held in the closed (ON) position while a fault current condition persists, protecting your wiring harness and connected appliances from thermal damage.\u003c\/p\u003e\n\u003cp\u003eFurthermore, this \u003cstrong\u003emarine circuit breaker\u003c\/strong\u003e is certified ignition protected. It is specifically sealed to prevent internal sparks from igniting surrounding flammable gases, making it safe for installation in the engine rooms of petrol-powered boats or near battery compartments and gas cylinders in RVs and camper trailers.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Function Design:\u003c\/strong\u003e Combines heavy-duty 70A overcurrent protection and manual ON\/OFF switching in one integrated unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Visibility Status Lever:\u003c\/strong\u003e The single yellow reset lever clearly indicates the trip status and can be mounted vertically or horizontally for intuitive operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Gauge Terminal Clearance:\u003c\/strong\u003e Equipped with robust 5\/16\" (Approx. M8) stud terminals that support high-torque connections and provide ample clearance for large wire lugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip-Free Safety Mechanism:\u003c\/strong\u003e Prevents the breaker from being forced or held on during an active electrical fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Protected:\u003c\/strong\u003e Safe for installation aboard petrol-powered marine vessels and enclosed utility spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Voltage Compatibility:\u003c\/strong\u003e Rated up to 48V DC maximum, easily supporting standard 12V, 24V, and 48V DC electrical architectures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBuilt to Outperform Standard Breakers\u003c\/h3\u003e\n\u003cp\u003eMany standard thermal breakers suffer from voltage drop, loose connections, and premature tripping due to inferior internal components and undersized studs. The Blue Sea Systems 187-Series overcomes these common issues with heavy-duty 5\/16\" (Approx. M8) terminal studs that accommodate heavy-gauge cables without crowding. The self-trimming case and clean bezel layout provide a refined aesthetic while resisting moisture and corrosion in harsh coastal and off-road environments.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eImportant Application Note: Do not use this circuit breaker as a manual switch where high inrush currents are expected, as repeated switching under heavy surge loads can degrade the internal contacts over time.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMain circuit protection for 12V, 24V, and 48V auxiliary battery systems in 4WDs, caravans, and motorhomes\u003c\/li\u003e\n\u003cli\u003eMarine power distribution panels and petrol engine bay installations\u003c\/li\u003e\n\u003cli\u003eProtecting high-draw DC appliances, inverter chargers, and DC-DC chargers\u003c\/li\u003e\n\u003cli\u003eIsolating solar charge controllers or auxiliary sub-panels for safe maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUpgrade Your DC Circuit Protection\u003c\/h3\u003e\n\u003cp\u003eSecure your electrical system against overloads and short circuits with industry-standard marine-grade hardware. Add the Blue Sea 187-Series 70A Panel Mount Thermal Circuit Breaker to your build today for reliable switching and fault protection.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631572680765,"sku":"BS-7041B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-70a-panel-mount-circuit-breaker-bs-7041b.png?v=1792904330","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-70a-187-series-panel-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}