{"product_id":"blue-sea-systems-187-series-40a-circuit-breaker-combined-switch","title":"Blue Sea Systems 187-Series 40A Circuit Breaker - Combined Switch","description":"\u003cp\u003eIn this review the Blue Sea Systems 7038 187-Series 40A circuit breaker is evaluated for small-boat and marine electrical needs; it is aimed at boaters, anglers, and DIY electricians who want a compact, reliable way to combine switching and overcurrent protection. The single-lever, push-to-disconnect design is the single biggest reason to buy: it gives clear visual indication of trip status while also serving as a user-friendly on\/off switch. The unit's waterproof construction and robust terminal clearance make it appealing where durability and easy wiring matter.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombined breaker and switch:\u003c\/strong\u003e Integrates circuit protection and switching into one device so users do not need a separate disconnect or switch assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Free design:\u003c\/strong\u003e Prevents holding the lever on during a fault, offering safer operation and protection for connected equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof construction:\u003c\/strong\u003e Recessed mounting holes and a self-trimming case keep moisture out and present a clean, finished appearance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-gauge terminal clearance:\u003c\/strong\u003e Large spacing around 5\/16 in terminal studs accepts heavy wire lugs and permits high-torque connections without crowding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition protection:\u003c\/strong\u003e Safe for installation aboard gasoline-powered boats, allowing installation near engines where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear trip indication:\u003c\/strong\u003e Large lever with vertical\/horizontal orientation makes fault status obvious at a glance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis circuit breaker is best for small craft owners, trolling motor installations, and anyone needing a compact, panel-mounted 40A protector that also functions as a switch. Installers who value easy wiring, corrosion resistance, and a straightforward mechanical disconnect will appreciate the large terminal studs and recessed mounting for a neat panel fit.\u003c\/p\u003e\u003cp\u003eThose who need very high interrupt ratings above the provided 5000A at 12V DC, remote electronic trip features, or integrated multi-circuit distribution should look elsewhere; this is a rugged, manual device rather than a digital or multi-function breaker bank.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWell-built and durable, with customers noting good resistance to saltwater spray and long-lasting construction.\u003c\/li\u003e\n\u003cli\u003eEasy to install and wire due to ample clearance around the 5\/16 in terminal studs and a self-trimming case that fits with a standard hole saw.\u003c\/li\u003e\n\u003cli\u003eCombined switch and circuit breaker function simplifies panel layout and provides push-to-disconnect convenience for applications like 36V trolling motors.\u003c\/li\u003e\n\u003cli\u003eWaterproof housing and ignition protection make it suitable for marine environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManual reset and basic operation mean no remote trip or electronic monitoring features for advanced installations.\u003c\/li\u003e\n\u003cli\u003eOne realistic limitation is that users expecting multi-amp selectable ranges or digital readouts will find this is a single 40A mechanical device.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e7038 187-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterrupt rating\u003c\/td\u003e\n\u003ctd\u003e5000A at 12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal stud\u003c\/td\u003e\n\u003ctd\u003e5\/16 in (M8) heavy-duty studs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003ePanel mount, recessed mounting holes, self-trimming case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater and ignition\u003c\/td\u003e\n\u003ctd\u003eWaterproof construction and ignition-protected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Blue Sea Systems 7038 187-Series 40A is a practical, well-made circuit breaker for boaters and DIY installers who need a combined switch and breaker with rugged terminals and waterproof housing. It delivers clear trip indication, easy installation, and the peace of mind of a Trip Free design, making it a strong value for standard marine and replacement applications where manual operation is acceptable.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan this be used on a gasoline-powered boat?\u003c\/strong\u003e\u003cbr\u003eYes. The unit is ignition-protected and safe for installation aboard gasoline-powered boats.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size lugs or wire does it accept?\u003c\/strong\u003e\u003cbr\u003eThe breaker has ample clearance around robust 5\/16 in (M8) terminal studs to accept heavy-gauge wire lugs and allow high-torque connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it provide remote trip or electronic monitoring?\u003c\/strong\u003e\u003cbr\u003eNo. This is a manual mechanical circuit breaker with push-to-disconnect and does not include remote trip or digital monitoring features.\u003c\/p\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":48205058113755,"sku":"B000VY8R0A","price":82.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51QLkwYMy-L._SL1000.jpg?v=1770292482","url":"https:\/\/gearmusthave.com\/products\/blue-sea-systems-187-series-40a-circuit-breaker-combined-switch","provider":"GearMustHave","version":"1.0","type":"link"}