Compact Mount 30-300A Double MRBF Terminal Fuse Block for Marine Battery 5/16\" M8 Stud Low Breaking Capacity Ceramic Copper
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SKU: 191286330:-2#30-400A;210200070:-2#58V
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MRBF Battery Terminal Fuse Block
The MRBF Battery Terminal Fuse Block from Conversions Tech is a compact, high-integrity DC circuit protection solution engineered for automotive, marine, RV, yacht, industrial, and renewable energy systems. Built with ceramic housing, copper alloy fuse elements, stainless steel studs, and PPS UL94-V0 thermoplastic base, it delivers maximum reliability and safety in demanding environments. Rated up to 58V DC and available in current ranges from 30A to 500A, this fuse block is the professional choice for protecting critical DC power distribution.
Key Specifications
| Application | Automotive, Marine, RV, Yacht, Industrial, Renewable Energy |
|---|---|
| Product Type | MRBF Battery Terminal Fuse Block |
| Rated Current | 30A – 500A |
| Rated Voltage | 58V DC Max |
| Breaking Capacity | Low, optimized for DC applications |
| Melting Element | Copper Alloy |
| Fuse Type | MRBF Fuse Link |
| Stud Size | M8 (5/16") Stainless Steel |
| Mounting Hole Size | M10 (3/8") |
| Body Material | Ceramic with PPS UL94-V0 Thermoplastic |
| Cap Design | Insulated, waterproof, and dustproof |
| Safety Standards | CSA Certified |
| Package | Fuse holder only (fuses sold separately) |
Technical Features
- High-current protection: Safeguards circuits up to 500A at 58V DC.
- Compact format: MRBF fuse design minimizes installation space at battery terminals.
- Durable construction: Ceramic housing with PPS UL94-V0 thermoplastic ensures thermal and mechanical resilience.
- Corrosion-resistant hardware: Stainless steel M8 studs and zinc-plated screws maintain long-term conductivity.
- Environmental protection: Insulating cap provides waterproof and dustproof sealing, preventing accidental shorts.
- Versatile application: Suitable for inverters, winches, bow thrusters, battery banks, EV power, and renewable systems.
Applications
The MRBF Battery Terminal Fuse Block from Conversions Tech is widely applied in:
- Marine: yachts, fishing boats, RVs, offshore vessels
- Automotive: passenger vehicles, heavy trucks, EVs, and charging stations
- Renewable energy: battery banks, solar PV, wind storage
- Industrial: cranes, construction machinery, portable DC systems
Frequently Asked Questions (FAQ)
1. What is an MRBF Battery Terminal Fuse Block?
An MRBF (Marine Rated Battery Fuse) block is a compact fuse holder mounted directly on the battery terminal. It provides fast-acting protection for high-current DC systems against overload and short circuits.
2. What current ratings are available?
Conversions Tech offers MRBF fuse blocks supporting 30A to 500A, adaptable to a wide range of DC loads.
3. What voltage does it support?
Each unit is rated up to 58V DC, covering 12V, 24V, and 32V battery systems in automotive and marine environments.
4. What materials are used?
The fuse block integrates a ceramic body, copper alloy fuse element, PPS UL94-V0 thermoplastic base, and stainless steel studs for maximum performance and durability.
5. What standards does it comply with?
Built to meet CSA safety standards and manufactured to Conversions Tech quality specifications for global compliance.
6. Where can it be used?
Designed for use in marine vessels, RVs, automobiles, EV charging systems, battery banks, and renewable energy storage.
7. What stud sizes are provided?
The MRBF fuse block includes M8 (5/16") stainless steel studs with zinc-plated steel screws for a secure and corrosion-resistant connection.
8. Are fuses included?
The package includes only the fuse block. MRBF fuses are sold separately in various ratings.
9. How does the insulating cap improve safety?
The insulating cap prevents accidental shorting, shields the fuse from moisture and dust, and ensures consistent operation in harsh environments.
10. How is it installed?
The block mounts directly to the battery terminal. Secure the holder to the stud, torque hardware per specifications, and insert the appropriate fuse. Always follow recommended torque values and electrical safety practices.
4 Reasons Pros Buy Direct from Conversions Tech
Headquartered in business-friendly Wyoming, we design, test, and ship every product from inside the United States—delivering genuine “Made-for-America” quality without the big-box markup.
Our in-house team owns every CAD file, mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. Vertical control means tighter tolerances, UL-listed safety, and up to 30 % lower cost than private-label imports.
Thousands of SKUs sit ready to go. Orders placed by 2 p.m. ship the same day, keeping contractors, OEMs, and distributors on schedule.
Need a torque spec or an OEM quote at dawn? You’ll speak directly with the Conversions Tech engineering desk—not a script reader—for instant answers, custom kitting, and private-label options.
Bottom line: For rugged, code-compliant electrical solutions shipped fast from a trusted U.S. source, choose Conversions Tech and build it right the first time.
