{"product_id":"blue-sea-90a-187-series-surface-mount-thermal-circuit-breaker","title":"Blue Sea 90A 187-Series Surface Mount Thermal Circuit Breaker","description":"\u003ch2\u003eHeavy-Duty 90A DC Circuit Protection and Manual Switching\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 90A Surface 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 power systems, this thermal circuit breaker simplifies electrical installations by eliminating the need for a separate battery switch and inline fuse holder. Whether you are protecting main DC feed lines, windlasses, or high-output auxiliary circuits, the 187-Series ensures dependable performance when managing heavy electrical loads.\u003c\/p\u003e\n\n\u003ch3\u003eEngineered for Safety: Trip-Free and Ignition Protected\u003c\/h3\u003e\n\u003cp\u003eWhen managing high-amperage DC circuits, safety and reliability are paramount. The Blue Sea 187-Series features a specialised trip-free design, meaning the internal mechanism cannot be manually held in the ON position while a fault current condition persists. This critical feature reduces the risk of wire overheating, insulation damage, and potential electrical fires caused by overriding a tripped breaker before the fault is resolved.\u003c\/p\u003e\n\u003cp\u003eFurthermore, this unit is fully ignition protected, making it safe for installation aboard petrol-powered boats and inside marine engine compartments where flammable fumes may be present. Enclosed in a weatherproof housing, it stands up to harsh coastal environments, vibration, and moisture ingress far better than standard automotive-grade alternatives.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Functionality:\u003c\/strong\u003e Combines heavy-duty 90A overcurrent protection with convenient manual ON\/OFF circuit switching in one compact device.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Visibility Actuator:\u003c\/strong\u003e Features a large yellow manual reset lever that clearly indicates trip status at a glance and allows for straightforward operation, even in dimly lit lockers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrip-Free Design:\u003c\/strong\u003e Prevents the circuit from being forced closed during an active overcurrent fault, protecting downstream cabling and equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine-Grade Durability:\u003c\/strong\u003e Weatherproof and ignition-protected enclosure suitable for marine engine rooms, boat hulls, and rugged 4WD canopies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure Terminations:\u003c\/strong\u003e Equipped with heavy-duty threaded stud terminals with nuts and washers to support high-current electrical ring terminals securely.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStreamlined Mounting:\u003c\/strong\u003e Integrated recessed mounting holes allow for clean, secure surface installation onto flat distribution panels or bulkheads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplication Considerations and Best Practices\u003c\/h3\u003e\n\u003cp\u003eThe single-lever operation provides a clear visual indication of whether the circuit is live, manually switched off, or tripped due to an overload. Compared to replaceable fuses, a resettable thermal breaker saves time and eliminates the need to carry spare high-amp fuses on board. Please note that while this breaker is designed to serve as a convenient manual disconnect switch, it is not intended to be used as a regular switch for loads where high inrush currents are expected.\u003c\/p\u003e\n\n\u003ch3\u003eUpgrade Your Electrical Distribution System\u003c\/h3\u003e\n\u003cp\u003eProtect your high-current DC wiring and simplify circuit management with industry-proven hardware. Add the Blue Sea 187-Series 90A Surface Mount Thermal Circuit Breaker to your setup today for dependable, marine-grade circuit protection across your vessel or off-grid vehicle.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631590015037,"sku":"BS-7143B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-90a-surface-mount-circuit-breaker-bs-7143b.png?v=1792904364","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-90a-187-series-surface-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}