300A MRBF Fuse – Reliable Protection for Lithium Battery Systems

NCC Trained · Victron Dealer

300A MRBF Fuse – Reliable Protection for Lithium Battery Systems

Rayne Automotive

£19.99

Warranty 1 year

Available to order

Design your full system

183 five-star Google reviews

Delivery

We're closed for a family wedding from Monday 26 to Wednesday 28 October. Orders placed during this time are processed when we reopen on Thursday 29 October.

  • Made in the UK · NCC & Victron trained team
  • Technical support from the people who build the systems
  • Need help? Speak with an expert

About this product

The 300A MRBF Fuse is the ultimate choice for protecting your campervan's electrical system, especially when using powerful lithium battery setups. Designed for high fault current scenarios, this compact fuse mounts directly onto your battery terminal, saving space and ensuring reliable performance even in the toughest environments. With a 10,000A interrupting capacity, it's perfect for systems powering induction hobs, air fryers, and other high-demand appliances.

Whether you're off-grid or on, this MRBF fuse provides peace of mind by delivering superior overcurrent protection and safeguarding your electrics. Install your leisure system with confidence.

A Great alternative to a T-fuse as it provides adequate protection in a smaller space. 

Features:

  • High Interrupting Capacity: Handles up to 10,000A for reliable protection.
  • Space-Saving Design: Compact size mounts directly onto battery terminals.
  • Durable Construction: Built for demanding environments like campervans and marine systems.
  • Rated for 300A: Perfect for large lithium battery systems with high loads.

Specifications:

  • Current Rating: 300A
  • Interrupting Capacity: 10,000A
  • Voltage Rating: Up to 58V DC
  • Mounting Style: Direct to battery terminal (M8 or M10)

Why Choose MRBF Fuses?

  • Compact, efficient design ideal for tight spaces.
  • Superior protection for high-fault-current applications.
  • Reliable performance in campervan, marine, and mobile systems.

Questions and answers

Can Rayne Automotive help me choose the right option?

Yes. Use the System Builder for a full specification, or book a consultation and tell us what you want to run and what is already fitted.

Do you supply trade accounts?

Yes. Van converters can apply for a Rayne Automotive trade account for kit pricing and support.

Is help available after I buy?

Yes. The Help Centre carries installation instructions, and the team supports what it sells.

More from this range

Building the complete electrical system?

Plan the charging, storage and distribution together with the System Builder, browse the example complete systems, or book a consultation and tell us what you want to run and what is already fitted.

Shop complete systems Open the System Builder Book a consultation