---
product_id: 445725368
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: "₨39053"
currency: LKR
in_stock: false
reviews_count: 6
category: "Hamolar"
url: https://www.desertcart.lk/products/445725368-3-pack-300a-circuit-breaker-with-manual-reset-fuse-holder
store_origin: LK
region: Sri Lanka
---

# 300A high current capacity Manual push-button reset Wide temp range -32°C to 82°C 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:** ₨39053
**Availability:** ❌ Out of Stock

## Summary

> 🔋 Power up with confidence—never get caught powerless again!

## 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?** ₨39053 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/445725368-3-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

- • **Premium Craftsmanship:** Copper washers & wire lugs ensure superior conductivity and durability.
- • **Reset, Don’t Replace:** Forget fuse swaps—reset instantly with a sleek push-button kill switch.
- • **Versatile Compatibility:** Seamlessly integrates with 12V-48V DC systems across cars, boats, RVs, and ATVs.
- • **Built for Harsh Conditions:** Operates flawlessly from freezing -32°C to scorching 82°C environments.
- • **Ultimate Overload Protection:** Safeguard your amps & motors from damaging power surges with 300A capacity.

## Overview

The Hamolar 3 Pack 300A Circuit Breaker is a robust manual reset fuse holder designed for 12V-48V DC systems, offering reliable overload and short circuit protection for car audio, marine, and RV applications. Featuring a high 300A rating, push-button reset/kill switch functionality, and durable components like copper washers, it operates efficiently across extreme temperatures (-32°C to 82°C), eliminating the hassle of fuse replacements while safeguarding your valuable electronics.

## Description

Hamolar Circuit Breaker Reset Fuse No need to keep replacing fuses anymore, simply reset breaker and you are ready to go. Description: This Circuit Breaker offers critical protection to your system. When the system is over power or short circuit, the breaker will cut and save your equipment. No need to replace the fuses, the system can be reset by a simple switch which also offers safe and instant system shut down. Specifications: Ampere range: 300A. Ampere Optional: 30A / 50A / 80A / 100A / 150A / 200A / 250A / 300A. Voltage: 12V-48V DC. Ambient Temperature: -32 ° c to 82 ° c (-25 ° f to 180 ° f). Size: 74mm (L) x 49mm (W) x 44mm (H) / (2.9*1.9*1.7 IN). Package Included: ·3pc x 300A Car Circuit Breaker ·6pc x 6*1/4 Terminal connectors and washer Features: ·Stops power surges from damaging your amps ,protects your trolling motor from electrical damage. ·Mount on panel or firewall unique push button reset can also be used as a kill switch. ·No more spending money on replacing fuses. ·Good conductivity and craftsmanship, high temperature pressure. ·Application: Typically used in auxiliary and accessory circuits for Boat, Trucks, Buses, Marine, RV and ATV applications. Also can used as an on/off button switch for the battery or DC sound system.

Review: Satisfactory - First order got cancelled and refunded, second time delivered before expected date. Product just put into use. Will update usage after 3 months.
Review: Works great

## 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 | #820,866 in Electronics ( See Top 100 in Electronics ) #231 in Car & Vehicle Fuse Holders |
| Brand | Hamolar |
| Circuit Breaker Type | Standard |
| Current Rating | 300 Amps |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,715) |
| Date First Available | 13 June 2021 |
| Item Weight | 110 g |
| Item model number | CB5-300A |
| Manufacturer | Hamolar |
| Manufacturer Part Number | CB5-300A |
| Mounting Type | Panel Mount |
| Number Of Poles | 1 |
| Product Dimensions | 43D x 49W x 43H Millimeters |
| 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:** 43D x 49W x 43H Millimeters

## 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/41WeGvAUUPS.jpg)
![3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer - Image 2](https://m.media-amazon.com/images/I/514m3ORfqQS.jpg)
![3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer - Image 3](https://m.media-amazon.com/images/I/5192y9aUa5L.jpg)
![3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer - Image 4](https://m.media-amazon.com/images/I/51fAnzeMlvS.jpg)
![3 Pack 300A Circuit Breaker with Manual Reset Fuse Holder for Car Audio Marine Boat Stereo Switch, with Wire Lugs Copper Washer - Image 5](https://m.media-amazon.com/images/I/51rUDM8uP-L.jpg)

## Available Options

This product comes in different **Size** options.

## 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

### ⭐⭐⭐⭐ Satisfactory
*by D***K on 8 April 2024*

First order got cancelled and refunded, second time delivered before expected date. Product just put into use. Will update usage after 3 months.

### ⭐⭐⭐⭐⭐ Review
*by E***T on 12 January 2026*

Works great

### ⭐⭐⭐⭐⭐ Review
*by E***R on 12 June 2025*

works great

## 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-12*