12V StudType Automatic Reset Circuit Breaker — 30A / 40A / 50A Why you need this breaker Provides continuous overcurrent protection for 12V systems without the downtime or expense of replacing fuses. The selfresetting design restores power automatically after a fault clears, keeping equipment running and reducing maintenance. interrupt capacity and robust construction protect sensitive and heavyduty loads in demanding applications, improving system reliability and safety. Secure, easy installation with stud termination and parallel mounting bracket ensures a durable electrical connection in mobile and marine environments. Key benefits Automatic reset: selfresetting mechanism removes the need for manual fuse replacement and minimizes service interruptions. Reliable fault clearing: 2.5kA interrupt capacity at 12Vdc delivers strong shortcircuit protection for automotive and commercial systems. Durable termination: copper stud bolt and 1032 thread termination provide a secure, lowresistance connection. Flexible mounting: parallel mounting bracket allows straightforward installation in tight or exposed locations. Wide operating range: operates from 40°C (40°F) to 85°C (185°F), with storage up to 125°C (260°F), suitable for harsh environmental conditions. Standards compliance: compatible with demanding applications such as buses and systems meeting SAE J553 and UL1500 requirements. Technical specifications Voltage: 12V DC Amperage options: 30A, 40A, 50A (select the rating that matches your circuit) Interrupt capacity: 2.5kA @ 12Vdc Termination: studtype copper bolt with 1032 thread Mounting: parallel mounting bracket included Operating temperature: 40°C to 85°C (40°F to 185°F) Storage temperature: up to 125°C (260°F) Compliance: suitable for systems requiring SAE J553 and UL1500 style performance Typical applications Automotive and trucks: Protect starter circuits, auxiliary lighting, winches, and accessory circuits on commercial and recreational vehicles. RVs and battery chargers: Maintain continuous power to coach systems and shore power charging circuits without frequent fuse changes. Marine and trolling motors: Safeguard trolling motor feeds, bilge pumps, and onboard electronics against overcurrent in corrosive, variabletemperature environments. Bus and commercial equipment: Use in demanding fleet or transit electrical systems where interrupt capacity and compliance matter. Installation and compatibility notes Intended for 12V DC systems. Choose the breaker amperage (30A, 40A, or 50A) to match the continuous load plus headroom for inrush currents. Install using the included parallel mounting bracket; use appropriate hardware for the 1032 stud termination to ensure a tight, corrosionresistant connection. Designed for automotive, marine, RV, truck, and battery charger applications and for use in systems where SAE J553 and UL1500 performance is required. Select the correct amperage for your circuit to ensure reliable, automatic protection for your 12V systems.