{"product_id":"blue-sea-100a-187-series-panel-mount-thermal-circuit-breaker","title":"Blue Sea 100A 187-Series Panel Mount Thermal Circuit Breaker","description":"\u003ch2\u003eIntegrated Manual Switching and Heavy-Duty Overcurrent Protection\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 100A Panel Mount Thermal Circuit Breaker\u003c\/strong\u003e delivers a reliable, space-saving solution by combining manual circuit switching and overcurrent protection into a single device. Engineered for demanding 12V, 24V, and up to 48V DC electrical systems, this marine-grade breaker eliminates the need to wire a separate battery switch and fuse holder. It is an ideal component for isolating and protecting high-draw auxiliary circuits in boats, caravans, 4WDs, and off-grid power setups.\u003c\/p\u003e\u003ch3\u003eEngineered for Harsh Marine and Automotive Environments\u003c\/h3\u003e\u003cp\u003eSafety is critical when installing electrical components near fuel sources or in damp conditions. This 187-Series thermal breaker is fully ignition protected (meeting SAE J1171 requirements), making it safe for installation aboard petrol-powered vessels and within vehicle engine bays. Its waterproof housing seals out moisture, salt spray, and dust, preventing internal corrosion that commonly causes unbranded breakers to fail prematurely or suffer from nuisance tripping.\u003c\/p\u003e\u003ch3\u003eFail-Safe Operation and Heavy-Gauge Terminations\u003c\/h3\u003e\u003cp\u003eFeaturing a high-visibility yellow single-lever actuator, the unit provides immediate visual confirmation of your circuit status whether mounted vertically or horizontally. The internal mechanism features a trip-free design, meaning the circuit will still trip in the event of an overload or short circuit even if the lever is physically held in the ON position. To prevent high-resistance hot spots and voltage drop under heavy 100A loads, the breaker is equipped with robust 5\/16\" (Approx. M8) terminal studs designed to accommodate heavy-gauge wire lugs and high-torque connections.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Function Design:\u003c\/strong\u003e Combines a manual ON\/OFF isolation switch with reliable 100A thermal circuit protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE J1171 Ignition Protected:\u003c\/strong\u003e Safe for installation in marine engine compartments and petrol-powered boat bilges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof Construction:\u003c\/strong\u003e Sealed enclosure protects internal components against moisture ingress in exposed environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip-Free Mechanism:\u003c\/strong\u003e Ensures the circuit cannot be manually held closed during an active electrical fault condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Terminals:\u003c\/strong\u003e Large 5\/16\" (Approx. M8) studs accept heavy-gauge ring terminals for secure, low-resistance connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlush Panel Mounting:\u003c\/strong\u003e Recessed mounting holes provide a clean, professional finish on switch panels and dashboards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Guidelines and System Integration\u003c\/h3\u003e\u003cp\u003eThis 100A circuit breaker is well suited for protecting main DC feed lines, windlasses, bow thrusters, hydraulic pumps, and dual-battery charging circuits up to a maximum rating of 48V DC. Please note an important operational exclusion: do not use this thermal circuit breaker as a manual switch where high inrush currents are expected, as repeated switching under extreme startup loads can degrade the internal contacts over time.\u003c\/p\u003e\u003ch3\u003eUpgrade Your DC Circuit Protection\u003c\/h3\u003e\u003cp\u003eEnsure your high-amperage 12V to 48V DC systems are safely isolated and protected against electrical faults. Add the Blue Sea 187-Series 100A Panel Mount Circuit Breaker to your setup today for dependable, marine-grade performance.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631574581309,"sku":"BS-7044B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-100a-panel-mount-circuit-breaker-bs-7044b.png?v=1792904241","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-100a-187-series-panel-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}