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300 Amp Flush Mount DC Circuit Breaker
300 Amp Flush Mount DC Circuit Breaker
SKU:CB300
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300 Amp Flush Mount DC Circuit Breaker
📝 300A Flush Mount DC Circuit Breaker
The 300A Flush Mount DC Circuit Breaker offers powerful protection and isolation for 12v–48v electrical systems. Built for campervans, RVs, and mobile applications, it prevents overloads and short circuits while doubling as a convenient battery disconnect switch — letting you safely isolate your electrical system without unplugging cables.
Constructed with a rugged waterproof housing and smooth manual reset operation, this breaker provides reliable, long-term performance in demanding touring and off-grid conditions.
⭐ Essential Benefits
• Dual-function design – operates as both a circuit breaker and manual battery isolator.
• Manual reset – push-button control with visible lever for quick circuit control.
• 12v–48v compatibility – wide DC range for multiple vehicle and off-grid systems.
• Durable waterproof build – designed to withstand demanding mobile environments.
• Smooth operation – on/off mechanism provides simple, consistent switching.
• Flush mount design – provides a compact, professional installation.
• Universal fit – ideal for campervans, RVs, caravans, motorhomes and off-grid setups.
⚙️ Functionality
This 300A flush-mount circuit breaker protects high-current DC circuits and acts as a master disconnect for batteries or auxiliary systems. It replaces standard fuse holders with an easy-reset manual switch, offering fast power isolation during servicing, storage or emergency shutdowns.
🔌 Compatibility
• Suitable for 12v–48v DC setups
• Compatible with campervans, RVs, caravans and motorhomes
• Suitable for battery systems and high-current auxiliary power circuits
🧰 Installation Difficulty
🟢 1/5 (Easy) – quick flush or panel mount installation with basic tools.
🔍 Features
• Push-button manual reset
• Flush / panel mount design
• 300A current rating
• 12v–48v DC range
• Waterproof housing
• Compact design
• Smooth, reliable reset mechanism
📊 Specifications
| Specification | Detail |
|---|---|
| Current Rating | 300A |
| Voltage Range | 12v–48v DC |
| Type | Manual Reset Circuit Breaker |
| Mounting Type | Flush / Panel Mount |
| Terminal Compatibility | To suit M6 ring terminals |
| Protection | Waterproof housing |
| Applications | Campervan, RV, Caravan, Motorhome, Off-grid systems |
📦 What’s Included
• 1 × 300A Flush Mount DC Circuit Breaker
For a premium option, shop here!
Premium circuit breakers
Our Commitment
At Campervan Builders, our commitment is simple: we only supply quality campervan, caravan, motorhome, and RV parts that we’ve personally tested in real off-grid conditions. From interior LED lighting to Starlink 12V conversion kits, every product is chosen for reliability, durability, and ease of installation. We back this with fast shipping Australia-wide, friendly support, and honest advice to help DIY builders and professionals alike. When you shop with us, you’re choosing proven gear that keeps you connected and comfortable on every adventure.