{"product_id":"blue-sea-70a-187-series-surface-mount-thermal-circuit-breaker","title":"Blue Sea 70A 187-Series Surface Mount Thermal Circuit Breaker","description":"\u003ch2\u003eHeavy-Duty 70A Overcurrent Protection for Marine and Off-Grid DC Systems\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBlue Sea 187-Series 70A Surface Mount Thermal Circuit Breaker\u003c\/strong\u003e delivers dependable overcurrent protection and manual switching in a single, compact unit. Engineered specifically for demanding marine, automotive, and off-grid DC electrical installations, this breaker protects your wiring and equipment from damaging overloads and short circuits. Supporting DC systems up to 48V DC (covering standard 12V, 24V, and 48V battery configurations), it provides a robust safeguard for main feeder lines, high-draw appliances, and auxiliary battery banks.\u003c\/p\u003e\u003ch3\u003eCertified Ignition Protection for Harsh Environments\u003c\/h3\u003e\u003cp\u003eWhen installing electrical components in enclosed spaces or aboard petrol-powered vessels, safety is critical. This 187-Series circuit breaker is fully ignition protected, meaning it is designed to prevent internal sparks from igniting surrounding flammable vapours. This makes it safe for installation inside petrol engine compartments, battery boxes, and bilge areas on boats, as well as in custom 4WD canopies and caravan power systems where gas or fuel vapours may be present.\u003c\/p\u003e\u003ch3\u003eHigh-Torque Connections and Clear Status Indication\u003c\/h3\u003e\u003cp\u003eUnlike standard low-grade alternatives that suffer from voltage drop, heat build-up, or premature nuisance tripping, Blue Sea Systems builds the 187-Series for maximum conductivity and longevity. The housing features heavy-duty 5\/16\" (Approx. M8) terminal studs that easily accommodate large-gauge cable lugs and support high-torque connections, minimising electrical resistance under continuous 70A loads. A prominent yellow manual reset lever provides an immediate visual indication of the circuit status and allows you to manually trip and isolate the circuit during maintenance or emergencies.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e70A Thermal Protection:\u003c\/strong\u003e Safeguards heavy-duty DC circuits across 12V, 24V, and up to 48V DC architectures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Protected:\u003c\/strong\u003e Certified safe for installation in petrol engine compartments and enclosed marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Terminals:\u003c\/strong\u003e Robust 5\/16\" (Approx. M8) studs accept large ring terminals for secure, high-torque connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Reset \u0026amp; Isolation:\u003c\/strong\u003e Visible yellow lever clearly displays tripped status and enables manual circuit disconnection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Surface Mounting:\u003c\/strong\u003e Pre-drilled mounting holes allow straightforward installation onto flat panels, bulkheads, or distribution boards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplication Guidelines and System Integration\u003c\/h3\u003e\u003cp\u003eThe surface-mount footprint makes this unit straightforward to integrate into custom power distribution panels in caravans, camper trailers, boats, and service vehicles. While the manual trip lever allows for convenient system isolation during servicing, please note an important operational exclusion: \u003cstrong\u003edo not use this circuit breaker as a regular on\/off switch where high inrush currents are expected\u003c\/strong\u003e, as repeated switching under heavy surge loads can degrade the internal thermal mechanism over time.\u003c\/p\u003e\u003ch3\u003eSecure Your DC Electrical System\u003c\/h3\u003e\u003cp\u003eUpgrade your marine, RV, or off-grid power distribution setup with reliable circuit protection. Add the Blue Sea 187-Series 70A Thermal Circuit Breaker to your build today for safe, durable, and compliant DC power management.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":43631589425213,"sku":"BS-7141B","price":167.82,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-7141b-70a-thermal-circuit-breaker.png?v=1792904341","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-70a-187-series-surface-mount-thermal-circuit-breaker","provider":"Solar 4 RVs","version":"1.0","type":"link"}