30–300Amp Waterproof Car Circuit Breaker — Reliable Overload Protection for Automotive, Marine & RV Systems
When a short circuit or current overload strikes mid-journey, the last thing you want is a blown fuse buried deep in your engine bay. This waterproof circuit breaker gives automotive enthusiasts, boaters, and RV owners a fast-acting, resettable solution that keeps electrical systems protected without the hassle of replacing fuses.
Built with a bimetal internal structure and sealed in an IP67-rated waterproof housing, this breaker measures compactly for easy installation in tight spaces. It connects via M6 x 2 threaded studs and is rated for 12–48V DC systems, covering a wide range of amperage options from 30A to 300A to suit different circuit demands.
Whether you're wiring a winch on an off-road rig, protecting a marine bilge pump, or safeguarding your motorhome's 12V distribution panel, this circuit breaker delivers dependable protection with a simple manual reset — no tools required.
✅ Compatible with 12V–48V DC electrical systems including automotive, marine, RV, truck, bus, and off-road vehicle applications.
Key Features
- 🌊 IP67 Waterproof & Sealed Housing — Fully sealed construction withstands water immersion, making it suitable for engine compartments, bilge areas, and exposed outdoor installations.
- ⚡ Wide Amperage Range (30A–300A) — Available in 30A, 40A, 50A, 60A, 100A, 200A, and 300A ratings to match a broad range of circuit protection needs.
- 🔁 Manual Reset Button — Features an elliptical red button that pops open to cut power instantly; simply reset the handle to restore the circuit — no fuse replacement needed.
- 🔩 Vibration-Resistant M6 Studs — Includes M6 x 2 connection studs with lock washers that prevent loosening under vibration, ensuring a secure and stable connection.
- 🌡️ Wide Temperature Tolerance — Operates reliably from -32°C to 82°C (-26°F to 180°F), with storage tolerance down to -34°C and up to 149°C.
- 🚗 Versatile Application — Ideal for motorsport, trucks, buses, motorhomes, marine systems, winches, yachts, and off-road vehicles where overload or short-circuit protection is critical.
Who Is This For
🚤 Marine & Boat Owners
Protect bilge pumps, navigation electronics, and onboard electrical systems with a breaker rated for wet, corrosive environments.
🏕️ RV & Motorhome Travelers
Safeguard your 12V–48V distribution panel and appliances during long hauls with a resettable breaker that eliminates roadside fuse hunts.
🔧 Off-Road & Motorsport Enthusiasts
Wire winches, auxiliary lighting, and high-draw accessories with confidence knowing your circuit is protected against sudden overloads.
🚛 Truck & Bus Fleet Operators
Install in commercial vehicle electrical systems where reliable, long-lasting circuit protection reduces maintenance downtime.
Technical Specifications
| Color |
Black |
| Circuit Rating |
30A, 40A, 50A, 60A, 100A, 200A, 300A (select variant) |
| Voltage Rating |
12–48V DC |
| Interrupt Rating |
3000A @ 30V DC |
| Weatherproof Rating |
IP67 |
| Number of Poles |
2 |
| Connection Studs |
M6 x 2 with lock washers |
| Operating Temperature |
-32°C to 82°C (-26°F to 180°F) |
| Storage Temperature |
-34°C to 149°C (-29°F to 300°F) |
| Reset Type |
Manual (elliptical red button) |
| Product Type |
Circuit Breaker |
Frequently Asked Questions
What amperage options are available?
This circuit breaker is available in 30A, 40A, 50A, 60A, 100A, 200A, and 300A ratings. Select the variant that matches your circuit's maximum current draw.
Is this circuit breaker truly waterproof?
Yes. The housing carries an IP67 waterproof rating, meaning it can withstand temporary immersion in water. It is suitable for engine compartments, bilge areas, and other wet or exposed environments.
What voltage systems is this compatible with?
This breaker is rated for 12V to 48V DC systems, making it compatible with standard automotive (12V/24V), marine, and RV electrical systems.
How do I reset the breaker after it trips?
Press the elliptical red button to cut power when the breaker trips. Once the fault is resolved, reset the red handle to restore the circuit. No tools or fuse replacement are required.
Can I use this for a winch or high-draw accessory?
Yes. The higher amperage variants (100A–300A) are well-suited for winches, inverters, and other high-current accessories on off-road vehicles, trucks, and marine vessels.
What connection hardware is included?
The breaker includes M6 x 2 threaded connection studs with lock washers to ensure a secure, vibration-resistant connection. Ring terminals and cables are not included and must be sourced separately.
What is the interrupt rating of this breaker?
The interrupt rating is 3000A at 30V DC, which means it can safely interrupt fault currents up to 3000 amps, providing robust protection for your electrical system.
Protect your electrical system with confidence. Choose the right amperage for your application and enjoy reliable, resettable circuit protection — built for automotive, marine, and off-road demands.
