---
product_id: 399769978
title: "3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer"
brand: "hamolar"
price: "€ 33.99"
currency: EUR
in_stock: true
reviews_count: 13
category: "Hamolar"
url: https://www.desertcart.ie/products/399769978-3-pack-300a-circuit-breaker-with-manual-reset-fuse-holder
store_origin: IE
region: Ireland
---

# 300A high current rating Manual push-button reset & kill switch Protects against overload & short circuit 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer

**Brand:** hamolar
**Price:** € 33.99
**Availability:** ✅ In Stock

## Summary

> ⚡ Reset Your Power, Rule the Road & Waves!

## Quick Answers

- **What is this?** 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer by hamolar
- **How much does it cost?** € 33.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/399769978-3-pack-300a-circuit-breaker-with-manual-reset-fuse-holder)

## Best For

- hamolar enthusiasts

## Why This Product

- Trusted hamolar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reset & Go:** Unique manual reset button doubles as a kill switch—no more fuse replacements, just quick resets to keep you moving.
- • **Powerhouse Protection:** Safeguard your amps and batteries with a robust 300A circuit breaker designed for high-demand car and marine audio systems.
- • **Built to Brave Extremes:** Operates flawlessly from -32°C to 82°C, ensuring reliable performance whether you're on icy trails or sunny seas.
- • **Universal Compatibility:** Seamlessly fits 12V to 48V DC systems, perfect for cars, boats, RVs, and ATVs—versatility that matches your adventurous lifestyle.
- • **Complete Installation Kit:** Includes wire lugs and copper washers for a professional, secure setup—because your gear deserves the best.

## Overview

The Hamolar 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder offers high-capacity overload protection for 12-48V DC systems, ideal for car audio, marine, and off-road applications. Featuring a manual reset push-button that doubles as a kill switch, it prevents damage from power surges and short circuits. Built to withstand extreme temperatures and equipped with wire lugs and copper washers, this panel-mount breaker ensures a durable, professional installation and reliable performance across diverse environments.

## Description

Buy Hamolar 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer: Circuit Breaker - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Using in kawasaki mule - Works great
Review: Much better alternative to fuses - Great product and significantly better and easier than dealing with traditional fuse holders.

## Features

- · Function: This circuit breaker can protect the amplifier from being damaged by the over-load current or voltage. Meanwhile, the power supply can also be protected to avoid battery crack and explosion caused by short circuit.
- · Specification: Voltage 12-48V DC, compatible with all 12V/24V Systems. Ambient temperature: -32 ° c to 82 ° c (-25 ° f to 180 ° f) ，Accessories added wire lugs and Copper washer.
- · Manual Reset Circuit Breaker, Use in place of an inline fuse holder, the unique push button reset can also be used as a Kill Switch.
- · Protects your trolling motor from electrical damage, prevents excessive current and stops power surges from damaging Amps.
- · Application: Suitable for car audio/video system, boat, trucks, buses, RV's, ATV winches, marine and DC sound amplifier system overload protection.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B095YZN677 |
| Best Sellers Rank | #4,140 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Circuit Breaker Switches |
| Brand | Hamolar |
| Circuit Breaker Type | Standard |
| Current Rating | 300 Amps |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,772) |
| Date First Available | May 27, 2021 |
| Item Weight | 3.88 ounces |
| Item model number | CB5-300A |
| Manufacturer | Hamolar |
| Manufacturer Part Number | CB5-300A |
| Mounting Type | Panel Mount |
| Number Of Poles | 1 |
| Product Dimensions | 1.7"D x 1.93"W x 1.7"H |
| UPC | 721703426408 |
| Voltage | 12 Volts, 24 Volts |

## Product Details

- **Brand:** Hamolar
- **Circuit Breaker Type:** Standard
- **Current Rating:** 300 Amps
- **Mounting Type:** Panel Mount
- **Product Dimensions:** 1.7"D x 1.93"W x 1.7"H

## Images

![3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer - Image 1](https://m.media-amazon.com/images/I/71XUF5RC5ML.jpg)

## Questions & Answers

**Q: Can electricity flow in both directions through this circuit breaker - charge and discharge?**
A: It is basically an inline fuse. I have mine with the source being my panels and a fuse placed before going into my charge controller. I am running one unit on both + and - of the solar panel before it goes into charge controller and I also run one unit on both  + and - as it exits my charge controller going to the battery bank. using 4 units  total.  Which direction you wish to direct your electrical current should not mater, if the amps surge it should trip the fuse. Just put it in front of the unit you are trying to protect. In my case protecting solar charger from solar panels before going into solar charge controller and from battery bank before going in to solar charge controller.

**Q: Will 3/8"lugs work on this**
A: Yes, use a star washer to secure the larger lug.

**Q: what size is recommended for a 3500 watt set up?**
A: Ryan, I do not know if you are talking about pulling 3500 watts DC or if you are connecting and inverter 3500 watt from DC.

If you are talking about use a 3500 ac watts inverter, I need to know at whar voltage ia the DC in for the inverter. The amps at 12v , 24v , 36v and 48v  are differents, in the inveeter, at higher to increase from DC to AC in the inverter, higher will be the amps it pull from the batteries that can be in serie for those DC voltage. If you are pulling 3500 watts in DC from batteries, just calculate an average of 100 watts per amp. 3500 watts can be 350 amps.

**Q: I am looking for a drawing of the hole pattern to incorporate the parts in an assemlby kit. do you have a step file or such of the part.**
A: L 3" x W 1 3/4" H 1 1/4" mounting holes are 1 1/2" diagonal. Make sure you read other people questions just not the reviews. Cheers

## Customer Reviews

### ⭐⭐⭐⭐⭐ Using in kawasaki mule
*by E***T on January 12, 2026*

Works great

### ⭐⭐⭐⭐⭐ Much better alternative to fuses
*by D***D on October 3, 2025*

Great product and significantly better and easier than dealing with traditional fuse holders.

### ⭐⭐⭐⭐⭐ Worth the money! Great value
*by B***C on November 13, 2025*

They’ve held up well and really like the disconnect feature, easy to install. Definitely recommend.

## Frequently Bought Together

- Hamolar 3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer
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- TKDMR 160Pcs Copper Wire Lugs AWG2 4 6 8 10 12 with Heat Shrink Set, 80Pcs Battery Cable Ends Ring Terminals Connectors Tubing Assortment Kit

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-02*