{"product_id":"blue-sea-135a-187-series-panel-mount-thermal-circuit-breaker","title":"Blue Sea 135A 187-Series Panel Mount Thermal Circuit Breaker","description":"\u003ch2\u003eIntegrated Switching and High-Current Circuit Protection\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 135A Panel Mount Thermal Circuit Breaker\u003c\/strong\u003e delivers reliable overcurrent protection and manual switching in a single, robust unit. Engineered for demanding marine, RV, caravan, and off-grid electrical systems, this heavy-duty component consolidates your setup by eliminating the need for a separate isolation switch and fuse holder. By bringing both control and protection to a single panel-mounted point, it streamlines wiring layouts and reduces potential failure points in high-amperage DC circuits.\u003c\/p\u003e\u003ch3\u003eEngineered for Safety in Harsh Environments\u003c\/h3\u003e\u003cp\u003eWhen managing high-current loads up to 135A, inferior protection devices can suffer from voltage drop, nuisance tripping, or thermal failure under sustained loads. The 187-Series is built to mitigate these risks. Featuring a thermally responsive bi-metal blade, it reacts accurately to overcurrent conditions while tolerating temporary, normal load fluctuations.\u003c\/p\u003e\u003cp\u003eCrucially, this unit is \u003cstrong\u003eignition protected\u003c\/strong\u003e, making it safe for installation aboard petrol-powered boats, in engine bays, or within battery compartments where flammable gases may accumulate. Its sealed, weatherproof housing resists moisture, salt spray, and dust ingress, ensuring dependable operation in exposed marine cockpits, 4WD canopies, and off-grid power enclosures.\u003c\/p\u003e\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Function Design:\u003c\/strong\u003e Combines manual on-off circuit switching with reliable thermal overcurrent protection in one compact device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip-Free Mechanism:\u003c\/strong\u003e Internal safety design ensures the breaker will trip during a fault current condition even if the manual lever is physically held in the ON position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Visual Status:\u003c\/strong\u003e The large, single yellow reset lever provides immediate visual confirmation of whether the circuit is live, manually switched off, or tripped.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Terminal Clearance:\u003c\/strong\u003e Ample clearance around the terminal studs easily accommodates heavy-gauge wire lugs required for 135A current paths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlush Panel Mounting:\u003c\/strong\u003e Waterproof recessed mounting holes allow for a clean, professional installation on control panels and switchboards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Protected:\u003c\/strong\u003e Certified safe for marine engine rooms and spaces containing explosive fumes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Considerations and Installation\u003c\/h3\u003e\u003cp\u003eThe panel-mount form factor is ideal for main DC distribution panels, inverter feeds, windlass controls, bow thrusters, and high-output charging systems. The recessed mounting holes provide a neat finish while maintaining the environmental seal of the housing. Please note an important operational exclusion: \u003cstrong\u003edo not use this breaker as a regular manual switch where high inrush currents are expected\u003c\/strong\u003e, as repeated switching under heavy surge loads can prematurely wear the internal contacts.\u003c\/p\u003e\u003ch3\u003eUpgrade Your DC System Protection\u003c\/h3\u003e\u003cp\u003eProtect your high-draw appliances and cabling with marine-grade hardware designed for longevity. Add the Blue Sea 187-Series 135A Thermal Circuit Breaker to your system for safe, consolidated circuit management on the water or off the grid.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631579004989,"sku":"BS-7047B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-187-series-135a-thermal-circuit-breaker-bs-7047b.png?v=1792904256","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-135a-187-series-panel-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}