{"product_id":"blue-sea-25a-187-series-panel-mount-thermal-circuit-breaker","title":"Blue Sea 25A 187-Series Panel Mount Thermal Circuit Breaker","description":"\u003ch2\u003eCombined Circuit Protection and Manual Switching for Harsh Environments\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 25A Panel Mount Thermal Circuit Breaker\u003c\/strong\u003e delivers reliable overcurrent protection and manual switching in a single, robust unit. Engineered for demanding electrical systems up to 48V DC, this component simplifies wiring architectures by eliminating the need for a separate inline fuse holder and isolation switch. Whether you are outfitting a marine vessel, an off-grid 4WD canopy, or a custom caravan electrical board, this breaker ensures critical circuits remain safe from overload and short-circuit events.\u003c\/p\u003e\u003ch3\u003eEngineered for Safety and Trip-Free Reliability\u003c\/h3\u003e\u003cp\u003eWhen working with high-energy DC battery banks, compromising on circuit protection introduces severe electrical fire risks. Unlike standard switches or inferior breakers that can fail under load, the Blue Sea 187-Series features a dedicated \u003cstrong\u003etrip-free mechanism\u003c\/strong\u003e. This internal design ensures the breaker cannot be manually held in the ON position while a fault-current condition exists, protecting your cabling and downstream appliances from thermal runaway.\u003c\/p\u003e\u003cp\u003eAdditionally, the housing is fully \u003cstrong\u003eignition protected\u003c\/strong\u003e and weatherproof. This makes it compliant and safe for installation aboard petrol-powered boats and near battery enclosures where explosive gases may accumulate, significantly reducing operational hazards in enclosed spaces.\u003c\/p\u003e\u003ch3\u003ePractical Panel Installation and Heavy-Duty Connectivity\u003c\/h3\u003e\u003cp\u003eDesigned for clean integration into custom switchboards and dashboards, this unit utilises waterproof recessed mounting holes for a flush, professional finish. The high-visibility yellow lever provides immediate visual confirmation of the circuit status and can be oriented vertically or horizontally to suit your layout.\u003c\/p\u003e\u003cp\u003eTo prevent voltage drop and thermal buildup at the connection point, the breaker is equipped with generous clearance around its 5\/16\" (Approx. M8) terminal studs. This design easily accommodates heavy-gauge wire lugs, ensuring secure mechanical and electrical connections for high-draw accessories.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Function Design:\u003c\/strong\u003e Combines 25A thermal circuit protection and manual ON\/OFF switching into one compact device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip-Free Safety Mechanism:\u003c\/strong\u003e Internally disconnects and cannot be forced ON during an active electrical fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Protected \u0026amp; Weatherproof:\u003c\/strong\u003e Safe for installation in marine bilges, petrol boat engine bays, and exposed off-grid environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Terminals:\u003c\/strong\u003e Large 5\/16\" (Approx. M8) studs provide ample clearance for heavy-gauge lugs in 12V, 24V, and up to 48V DC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Visual Status:\u003c\/strong\u003e High-visibility yellow reset lever clearly indicates tripped status and allows easy manual isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlush Panel Mounting:\u003c\/strong\u003e Recessed mounting holes ensure a neat, low-profile installation on dashboards and power distribution panels.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Guidelines and System Integration\u003c\/h3\u003e\u003cp\u003eThis 25A thermal breaker is ideal for protecting main branch circuits, anchor winches, dc-to-dc chargers, and auxiliary lighting arrays across 12V, 24V, and 48V DC setups. For optimal longevity and contact preservation, please note a specific operational exclusion: \u003cstrong\u003edo not use this breaker as a manual switch where high inrush currents are expected\u003c\/strong\u003e. Switching high inrush loads regularly can prematurely wear the internal thermal contacts.\u003c\/p\u003e\u003ch3\u003eUpgrade Your DC Circuit Protection\u003c\/h3\u003e\u003cp\u003eSecure your marine, RV, or off-grid power distribution system with industry-standard protection. Add the Blue Sea 187-Series 25A Panel Mount Thermal Circuit Breaker to your setup today for dependable, consolidated switching and fault isolation.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631571042365,"sku":"BS-7035B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-25a-panel-mount-circuit-breaker-bs-7035b.png?v=1792904292","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-25a-187-series-panel-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}