---
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 12V Terminal Block for Marine Car RV Truck Solar Systems (Red)"
brand: "jamgoer"
price: "$71.74"
currency: USD
in_stock: true
category: "Jamgoer"
url: https://www.desertcart.us/products/320597296-300a-bus-bar-12v-waterproof-marine-bus-bar-heavy-duty
store_origin: US
region: United States of America
---

# 300A heavy-duty current rating Waterproof & dustproof design 4 x M8 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 12V Terminal Block for Marine Car RV Truck Solar Systems (Red)

**Brand:** jamgoer
**Price:** $71.74
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your setup with marine-grade durability and sleek design!

## 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 12V Terminal Block for Marine Car RV Truck Solar Systems (Red) by jamgoer
- **How much does it cost?** $71.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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

- • **Smart Organization:** Non-slip sponge base and writable label space keep your connections stable and clearly identified.
- • **Powerhouse Performance:** Handles up to 300A for robust power distribution in marine, RV, and solar setups.
- • **Effortless Installation:** Four mounting holes and removable side plates make mounting and wiring a breeze in any orientation.
- • **Built to Brave the Elements:** Waterproof and dustproof with sealed covers to resist rain, dust, and seawater corrosion.
- • **Premium Materials, Premium Safety:** Brass and nickel-plated bus bar with glass-fiber reinforced nylon base for durability and rust resistance.

## Overview

The jamgoer 300A 12V Waterproof Marine Bus Bar is a heavy-duty power distribution block featuring four M8 terminal studs, crafted from brass and nickel-plated for superior conductivity and corrosion resistance. Its waterproof, dustproof design with reinforced nylon base ensures reliable performance in harsh marine, RV, truck, and solar environments. Easy to mount and label, it delivers professional-grade power management with lasting durability.

## Description

Buy jamgoer 300A Bus Bar 12V Waterproof Marine Bus Bar Heavy Duty Module Design Power Distribution Block with 4 X M8(5/16") Terminal Studs 12V Terminal Block for Marine Car RV Truck Solar Systems (Red): Connecting Blocks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## 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 | #92 in Distribution Connecting Blocks #1,274 in Audio & Video Distribution Products |
| Brand Name | jamgoer |
| Centerline Length | 13.8 centimeters |
| Color | M8 Red |
| Connector Type | Screw |
| Current Rating | 300 A |
| Customer Reviews | 4.8 4.8 out of 5 stars (171) |
| Item Dimensions W x H | 2.72"W x 1.75"H |
| Manufacturer | jamgoer |
| Material Type | Brass, Nylon |
| Model | JG-DB300-4 |
| Mounting Type | Panel Mount |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Number of Items | 1 |
| Number of Positions | 4 |
| Part Number | FBA-HX4-F3607-R |
| Specification Met | IEC |
| UPC | 699993229033 |
| Unit Count | 1 Count |
| Voltage | 48 volts |

## Product Details

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

## Images

![300A Bus Bar 12V Waterproof Marine Bus Bar Heavy Duty Module Design Power Distribution Block with 4 X M8(5/16") Terminal Studs 12V Terminal Block for Marine Car RV Truck Solar Systems (Red) - Image 1](https://m.media-amazon.com/images/I/71nrMrVgdyL.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 United States of America*
*Store origin: US*
*Last updated: 2026-10-15*