40A DC Circuit Breaker — 12V/24V/48V

Discover the 40A Automatic DC Circuit Breaker / Switch – your ultimate solution for reliable power protection across a wide range of DC systems. Engineered to combine the essential functions of a robust 40A fuse and a convenient on/off switch, this compact unit ensures your electrical setups, from 12V to 48V, remain safe and fully operational. Gone are the days of constant fuse replacements; our innovative circuit breaker is fully resettable, offering superior convenience and peace of mind. It’s perfect for safeguarding against high power draw, short circuits, wiring mishaps, and equipment malfunctions, making it an indispensable component for any DC application.

This versatile device isn't just about protection; it also serves as a manual isolator. With its intuitive on/off switch function, you can effortlessly disconnect and reconnect your system whenever needed for maintenance or storage. Whether you're managing solar power, marine electronics, or automotive setups, this breaker provides both crucial overcurrent protection and simple system management in one durable package, designed specifically for panel or recess mounting.

• Dual Functionality: Acts as both a 40A resettable fuse and an on/off switch, simplifying your electrical system design and operation.
• Wide Voltage Compatibility: Safely operates with 12V, 24V, and 48V DC systems, offering broad application flexibility.
• Superior Overcurrent Protection: Automatically guards against excessive current caused by high power draw, short circuits, wiring errors, or equipment faults, protecting your valuable components.
• Resettable Convenience: Unlike traditional fuses that require replacement when blown, simply reset the breaker after an event – no need for costly and time-consuming replacements.
• Manual Isolation: Easily disconnect power with the built-in on/off switch for safe maintenance, system shutdowns, or quick troubleshooting.
• Robust & Reliable: Constructed from strong, UL94V-0 rated thermal plastic engineered to withstand high temperatures, ensuring long-lasting performance.
• All-Weather Ready: Features an IP67 waterproof rating, providing excellent protection against water and dust ingress, making it suitable for demanding outdoor and marine environments.
• Ignition Protected: Complies with stringent international standards (S.A.E. J1625, J1171, UL1500) for enhanced safety, especially critical in marine and automotive settings where ignition protection is vital.
• Flexible Installation: Designed for convenient panel or recess mounting, integrating smoothly into your existing electrical panels or custom enclosures.

• Efficiently connecting solar or wind charge controllers to battery banks.
• Providing a critical safety and disconnect point between off-grid inverter DC inputs and batteries.
• Reliable protection for general DC power distribution or charging circuits.
• Essential for various DC automotive and marine applications, safeguarding critical equipment like pumps, lights, and navigation systems.

• Rating: 40 Amps
• Type: Thermal Overcurrent Protection Device
• Material: High-Strength Thermal Plastic (UL rated 94V-0)
• Operating Temperature: -32°C to 82°C (-25.6°F to 179.6°F)
• Storage Temperature: -34°C to 149°C (-29.2°F to 300.2°F)
• Terminals Size: M6
• Enclosure Rating: IP67 (Waterproof and Dustproof)
• Dimensions: 74 x 48 x 37 mm (approx. 2.91 x 1.89 x 1.46 inches)
• Weight: 110g (approx. 0.24 lbs)
• International Standard Compliance: S.A.E. J1625, J1171, UL1500

Choose the 40A Automatic DC Circuit Breaker / Switch for unmatched reliability and safety in your DC power systems. Its unique combination of automatic overcurrent protection, a resettable design, and an integrated on/off switch makes it a superior alternative to traditional fuses, saving you time and money while providing greater control. Enjoy the confidence that comes with robust, waterproof, and ignition-protected performance, ensuring your valuable equipment is always secure and your power systems operate flawlessly. Invest in a smarter, safer, and more convenient DC power solution today.