---
product_id: 320597296
title: "300A Bus Bar 12V Waterproof Marine Bus Bar Heavy Duty Module Design Power Distribution Block with 4 X M8(5/16\") Terminal Studs Battery Bus Bar for Marine Car RV Truck Solar Systems (Red)"
brand: "jamgoer"
price: "30212 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/320597296-300a-bus-bar-12v-waterproof-marine-bus-bar-heavy-duty
store_origin: HU
region: Hungary
---

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

**Brand:** jamgoer
**Price:** 30212 Ft
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your adventures with marine-grade reliability!

## Quick Answers

- **What is this?** 300A Bus Bar 12V Waterproof Marine Bus Bar Heavy Duty Module Design Power Distribution Block with 4 X M8(5/16") Terminal Studs Battery Bus Bar for Marine Car RV Truck Solar Systems (Red) by jamgoer
- **How much does it cost?** 30212 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/320597296-300a-bus-bar-12v-waterproof-marine-bus-bar-heavy-duty)

## 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

- • **Label Like a Pro:** Dedicated write-on space for clear, professional circuit identification—no guesswork needed.
- • **Precision Engineering:** Brass and nickel-plated bus bar ensures superior conductivity and rust resistance.
- • **Power Up with Confidence:** Handles a robust 300 amps for your toughest marine, RV, or solar setups.
- • **Built to Brave the Elements:** Waterproof and dustproof with sealed covers to resist rain, dust, and seawater corrosion.
- • **Mount Anywhere, Wire Effortlessly:** Four mounting holes and removable side plates for flexible installation and easy wiring.

## Overview

The Jamgoer 300A Bus Bar is a heavy-duty, waterproof power distribution block designed for marine, RV, truck, and solar systems. Featuring a durable brass and nickel-plated bus bar with M8 terminal studs, it supports up to 300 amps at 48 volts. Its reinforced nylon base and sealed design protect against corrosion and environmental damage, while flexible mounting options and a write-on label area make installation and organization effortless.

## Description

Full description not available

## 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 |
|---------------|-------|
| Current Rating | 300 Amps |
| Connector Type | Screw |
| Number Of Contacts | 4 |
| Mounting Type | Panel Mount |
| Material | Brass, Nylon |
| Color | M8 Red |
| Brand | jamgoer |
| Voltage | 48 Volts |
| Number Of Poles | 4 |
| Product Dimensions | 2.72"W x 1.75"H |
| Centerline Length | 138 Millimeters |
| Specification Met | IEC |
| Manufacturer | Jamgoer |
| UPC | 699993229033 |
| Item Weight | 13.7 ounces |
| Item model number | JG-DB300-4 |
| Manufacturer Part Number | FBA-HX4-F3607-R |

## Product Details

- **Current Rating:** 300 Amps
- **Connector Type:** Screw
- **Number Of Contacts:** 4
- **Mounting Type:** Panel Mount
- **Material:** Brass, Nylon
- **Color:** M8 Red
- **Brand:** jamgoer
- **Voltage:** 48 Volts
- **Number Of Poles:** 4
- **Product Dimensions:** 2.72"W x 1.75"H

## Images

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

## Frequently Bought Together

- Jamgoer 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)
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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-24*