---
product_id: 554958351
title: "300A Bus Bar 12V Heavy Duty Module Design Power Distribution Block Waterproof Bus bar Box with 4X M8(5/16\") Terminal Studs for Battery Marine Automotive RV Car Truck (Black & Red)"
brand: "jamgoer"
price: "€ 95.48"
currency: EUR
in_stock: true
reviews_count: 13
category: "Jamgoer"
url: https://www.desertcart.it/products/554958351-300a-bus-bar-12v-heavy-duty-module-design-power-distribution
store_origin: IT
region: Italy
---

# 300A heavy-duty current rating Waterproof & dustproof design 4x M8 (5/16") terminal studs 300A Bus Bar 12V Heavy Duty Module Design Power Distribution Block Waterproof Bus bar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Black & Red)

**Brand:** jamgoer
**Price:** € 95.48
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your ride with precision and protection!

## Quick Answers

- **What is this?** 300A Bus Bar 12V Heavy Duty Module Design Power Distribution Block Waterproof Bus bar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Black & Red) by jamgoer
- **How much does it cost?** € 95.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/554958351-300a-bus-bar-12v-heavy-duty-module-design-power-distribution)

## Best For

- jamgoer enthusiasts

## Why This Product

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

## Key Features

- • **Smart Stability:** Non-slip sponge base ensures secure mounting even on rough rides
- • **Label & Organize:** Blank write-on space for easy circuit identification and professional setup
- • **Powerhouse Performance:** Handles up to 300A for robust electrical demands
- • **Marine-Grade Durability:** Brass & nickel-plated bus bar resists corrosion and rust
- • **Weatherproof Reliability:** Sealed with removable side plates and insulated cover to fight rain, dust, and seawater

## Overview

The Jamgoer 300A Bus Bar is a compact, heavy-duty 12V power distribution block designed for automotive, marine, RV, and truck applications. Featuring four M8 terminal studs, a corrosion-resistant brass and nickel-plated bus bar, and a waterproof, dustproof nylon-glass fiber reinforced base, it ensures reliable, safe, and organized electrical connections. Its smart design includes a non-slip base and writable labeling space, making it a top choice for professionals upgrading or expanding their power systems.

## Description

desertcart.com: Jamgoer 300A Bus Bar 12V Heavy Duty Module Design Power Distribution Block Waterproof Bus bar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Black & Red) : Electronics

Review: Great value for the money. - These worked great for my electrical upgrade on my RV. Add solar panels and controllers. Needed more posts. Quality is great. And the price was right.
Review: The compactness - It’s perfect and just right.

## Features

- Dimensions: The battery junction block is measured (L x W x H): 138 x 69 x 44.5 mm (5.433" x 2.72" x 1.75"); Stud size: M8 (5/16")
- High Quality: Bus Material: The bus bar is made of brass and nickel plated, which has good electric conduct performance and sturdy rust-resistant; The base is made of nylon - glass fiber reinforced to protect your safety, ensures great mechanical strength and durability
- Waterproof & Dustproof: This product With four removable side plates, a insulated rear cover, that's designed to withstand rain and dust, resist the air and seawater erosion
- Unique Design: The base has non-slip sponge, increased Stability; And the blank write-on space on the top allows easy labeling for each branch
- Easy to Mount: Surface screw fixed installation, four mounting holes make this terminal block easier to be mounted in any orientation; Removable windows for unobstructed wiring

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B55LJDD4 |
| Best Sellers Rank | #78 in Distribution Connecting Blocks |
| Brand | jamgoer |
| Centerline Length | 138 Millimeters |
| Color | M8 Black&Red |
| Connector Type | Screw |
| Current Rating | 300 Amps |
| Customer Reviews | 4.7 4.7 out of 5 stars (307) |
| Date First Available | June 27, 2022 |
| Item Weight | 1.76 pounds |
| Item model number | jamgoer-TB300-BlackRed |
| Manufacturer | Jamgoer |
| Manufacturer Part Number | F3607-2 |
| Material | Brass, Nylon |
| Mounting Type | surface |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Product Dimensions | 2.72"W x 1.75"H |
| Specification Met | UL |
| UPC | 699991562309 |
| Voltage | 12 Volts (DC) |

## Product Details

- **Brand:** jamgoer
- **Color:** M8 Black&Red
- **Connector Type:** Screw
- **Current Rating:** 300 Amps
- **Material:** Brass, Nylon
- **Mounting Type:** surface
- **Number Of Contacts:** 4
- **Number Of Poles:** 4
- **Product Dimensions:** 2.72"W x 1.75"H
- **Voltage:** 12 Volts (DC)

## Images

![300A Bus Bar 12V Heavy Duty Module Design Power Distribution Block Waterproof Bus bar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Black & Red) - Image 1](https://m.media-amazon.com/images/I/71w7sYGXMoS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value for the money.
*by C***. on June 4, 2025*

These worked great for my electrical upgrade on my RV. Add solar panels and controllers. Needed more posts. Quality is great. And the price was right.

### ⭐⭐⭐⭐⭐ The compactness
*by V***N on December 8, 2025*

It’s perfect and just right.

### ⭐⭐⭐⭐⭐ Perfect solution
*by S***B on October 16, 2023*

I own a jeep TJ, so I have upgraded it over the years and my battery was at its limit for attachments. I installed these (power and ground) and feel much better about the connections. It looks good, makes me feel safer, and works as expected. These are well built, although not waterproof, can easily have openings sealed to make it so.

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**Shop now:** [https://www.desertcart.it/products/554958351-300a-bus-bar-12v-heavy-duty-module-design-power-distribution](https://www.desertcart.it/products/554958351-300a-bus-bar-12v-heavy-duty-module-design-power-distribution)

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-03-02*