---
product_id: 370061195
title: "300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16\") Terminal Studs for Battery Marine Automotive RV Car Truck (Red)"
brand: "jamgoer"
price: "€ 148.57"
currency: EUR
in_stock: true
reviews_count: 5
category: "Jamgoer"
url: https://www.desertcart.fr/products/370061195-300a-bus-bar-heavy-duty-module-design-power-distribution-block
store_origin: FR
region: France
---

# 300A max current Waterproof & dustproof 4x M8 terminal studs 300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red)

**Brand:** jamgoer
**Price:** € 148.57
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your ride with precision and protection — never settle for less!

## Quick Answers

- **What is this?** 300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) by jamgoer
- **How much does it cost?** € 148.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/370061195-300a-bus-bar-heavy-duty-module-design-power-distribution-block)

## 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

- • **Rugged Durability:** Brass and nickel-plated bus with glass fiber reinforced nylon base resists corrosion and wear
- • **Weatherproof Design:** Fully sealed with removable side plates and insulated rear cover to withstand rain, dust, and seawater
- • **Powerhouse Performance:** Handles up to 300A continuous current for heavy-duty setups
- • **Universal Voltage Compatibility:** Operates seamlessly across 12V, 24V, and 48V DC systems
- • **Effortless Installation & Organization:** Four mounting holes plus non-slip sponge base and write-on labeling space for clean, secure setups

## Overview

The Jamgoer 300A Heavy Duty Bus Bar is a compact, waterproof power distribution block designed for 12V to 48V DC systems. Featuring four M8 terminal studs, a corrosion-resistant brass and nickel-plated bus, and a reinforced nylon base, it ensures reliable, high-current connections for marine, automotive, RV, and truck applications. Its weatherproof construction and smart design elements like non-slip padding and labeling space make it a must-have for professional-grade electrical setups.

## Description

Jamgoer 300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Busbar Box with 4X M8(5/16") Terminal Studs for battery distribution block Marine Automotive RV Car Truck (Red)Specification: •Base & Cover Material: Glass Fiber reinforced Nylon •Bus Material: Brass, Nickel plated •Working voltage: DC 12V - 48V •Max Operating Voltage: DC 48V •Max Continuous Currents: 300A •Terminal Stud Size: 4x M8 (5/16") •Dimensions (L x W x H): 138 x 69 x 44.5mm, (5.47 x 2.75 x 1.8 inch) •Weight: 12.8 ounce Package: •1 x Heavy-Duty Red Bus bar Box •Already assembled, don't worry.

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: A nice bus bar - This is a well made, reasonably priced bus bar. I used it for making neat, clean connections for my negative cables on my RV.

## Features

- Dimensions: The bus bar 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 battery distribution block 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: The power distribution block 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 battery terminals 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: RV terminal blocks 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 | B092Q3JBKD |
| Best Sellers Rank | #95,944 in Electronics ( See Top 100 in Electronics ) #44 in Distribution Connecting Blocks |
| Brand Name | jamgoer |
| Centerline Length | 138 Millimeters |
| Color | M8 Red |
| Colour | M8 Red |
| Connector Type | Screw |
| Connector type | Screw |
| Current Rating | 300 Amps |
| Current rating | 300 Amps |
| Customer Reviews | 4.8 out of 5 stars 272 Reviews |
| Item Dimensions W x H | 6.9W x 4.5H centimeters |
| Manufacturer | jamgoer |
| Material | Brass , Nickel |
| Material Type | Brass, Nickel |
| Model | JG-DB300-4 |
| Mounting Type | Panel Mount |
| Mounting type | Panel Mount |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Number of Positions | 4 |
| Number of contacts | 4 |
| Part Number | FBA-HX4-F3607-R |
| Specification Met | IEC |
| UPC | 699993229033 |
| Unit Count | 1.0 Count |
| Voltage | 48 Volts |

## Product Details

- **Connector type:** Screw
- **Current rating:** 300 Amps
- **Item pitch:** 8 Millimeters
- **Mounting type:** PCB Mount
- **Number of contacts:** 4

## Images

![300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) - Image 1](https://m.media-amazon.com/images/I/71nrMrVgdyL.jpg)
![300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) - Image 2](https://m.media-amazon.com/images/I/71DH3jBsJKL.jpg)
![300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) - Image 3](https://m.media-amazon.com/images/I/71pP7uB7D3S.jpg)
![300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) - Image 4](https://m.media-amazon.com/images/I/61yIbAEx5LL.jpg)
![300A Bus Bar Heavy Duty Module Design Power Distribution Block 12V 24V 48V DC Waterproof Busbar Box with 4X M8(5/16") Terminal Studs for Battery Marine Automotive RV Car Truck (Red) - Image 5](https://m.media-amazon.com/images/I/61bJ9aNHczS.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this terminal handle 48v dc in parallel with 100a?**
A: Yes this bus bar is rated for 300amp no matter the voltage so 48 volt at 100 amp will be no problem

**Q: Is this made in the United States?**
A: Box says made in China. Ordered 4 of these from 3 different vendors. Installed 2 on HD trucks ( with 4/0 battery cables). Seems like good quality. Time will tell. Even covers had quality plastic (not always the case). Need to watch options of stud size (M10 vs M8 if it matters to you ). Would buy again.

**Q: Same as T Tocas?**
A: Seems to be identical to the T Tocas brand 300A distribution box. Probably made by the same manufacturer. It has the same specs and is made the same way as my black Jamgoer brand distrubution box.

**Q: What are the posts (screws) and nuts made from?**
A: Stainless since they are marine use

## Customer Reviews

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

### ⭐⭐⭐⭐⭐ A nice bus bar
*by G***R on 14 July 2026*

This is a well made, reasonably priced bus bar. I used it for making neat, clean connections for my negative cables on my RV.

### ⭐⭐⭐⭐⭐ Good looks better quality.
*by A***O on 20 November 2025*

I bought these blocks when I was installing my inverter into my travel trailer to help organize and keep a clean look to my install and these did just that. the quality of the plastic and metal is top notch and they look so good. I'll have to get some photos of my inverter system install attached to this review in the future. but until then, take my word for it. These are nice. Highly recommend.

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-07-23*