CB-03 30A-300A 12-48V DC Waterproof Circuit Breaker with Manual Reset Ignition Protected
Part#CB-03
This 12V-48V DC waterproof circuit breaker offers advanced “Ignition Protected” safety and a convenient manual reset feature, ensuring reliable overload protection across diverse applications.
Its precise trip performance and durable construction with robust components make it an ideal, reusable solution for automotive, marine, and heavy-duty electrical systems.

CB-03 30A-300A 12-48V DC Waterproof Circuit Breaker with Manual Reset Features
- Advanced Waterproof and Ignition Protection
This robust circuit breaker features a fully waterproof design, ensuring reliable operation in marine and demanding outdoor environments. Its “Ignition Protected” certification provides enhanced safety for fuel-powered applications, preventing ignition of flammable vapors. This safety-focused design makes it an ideal solution for critical vehicle and boat installations.
- Broad Voltage Compatibility for Diverse Systems
These versatile DC circuit breakers are engineered for a wide voltage range, compatible with 12V to 48V DC electrical systems. This extensive voltage adaptability caters to a broad spectrum of vehicles and machinery, including trucks, boats, SUVs, yachts, cars, and RVs, offering universal application potential.
- Reusable Manual Reset and Master Disconnect
The reusable circuit breaker integrates a user-friendly manual break button and a reset arm, enabling convenient ON/OFF control for circuits. This manual reset fuse holder eliminates the need for constant fuse replacement, while also serving as a reliable master disconnect switch for immediate power cutoff.
- Precise Overload Trip Performance
The high-performance circuit breaker demonstrates predictable trip characteristics, as detailed in its time vs. percent of rated current curve. This intelligent protection device ensures rapid disengagement under severe overloads (e.g., 600% current trips in seconds) while allowing for momentary surges, providing accurate and dependable current limiting.
- Compact Design with Durable Components
This compact circuit protector boasts precise dimensions for easy installation in tight spaces, measuring approximately 2.91″ L x 1.9″ W x 1.73″ H. Constructed with durable contact studs, copper wire lugs, and a protective silicone insulating cap, this reliable fuse alternative is built for long-lasting performance and secure electrical connections.
CB-03 30A-300A 12-48V DC Waterproof Circuit Breaker with Manual Reset Datasheet
Product Size | 2.91 x 1.93 x 1.73 inches/73.8mm (L) x 48.1mm (W) x 44mm (H) |
Rated Voltage | 12-48VDC Maximum |
Rated Current | 30A / 40A / 50A / 60A / 70A / 80A / 100A / 120A / 150A / 200A / 250A / 300A |
Operating Temperature: | -40℃ to 100℃ |
Circuit Breaker Type | Standard |
Mounting Type | Surface Mount |
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