---
product_id: 803629808
title: "Joinfworld 400A Bus Bar 12V,4 x 3/8\" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative"
brand: "joinfworld"
price: "94105CFA"
currency: XOF
in_stock: true
reviews_count: 6
category: "Joinfworld"
url: https://www.desertcart.sn/products/803629808-joinfworld-400a-bus-bar-12v-4-x-3-8-m10
store_origin: SN
region: Senegal
---

# 400A max current capacity 4 x 3/8" heavy-duty stud terminals Protective cover & nuts for safety Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative

**Brand:** joinfworld
**Price:** 94105CFA
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your setup with confidence and style!

## Quick Answers

- **What is this?** Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative by joinfworld
- **How much does it cost?** 94105CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/803629808-joinfworld-400a-bus-bar-12v-4-x-3-8-m10)

## Best For

- joinfworld enthusiasts

## Why This Product

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

## Key Features

- • **Safety First Design:** Includes protective cover and nuts to minimize accidental shorts and keep your setup secure.
- • **Industrial-Grade Build:** 8mm thick copper bus bar paired with stainless steel studs ensures durability and superior conductivity.
- • **Powerhouse Performance:** Handles up to 400A at 12V for robust power distribution without compromise.
- • **Versatile Connectivity:** Equipped with 4 large 3/8" studs plus 3 M5 screw terminals to accommodate diverse wiring needs.
- • **Streamlined Organization:** Neatly consolidates positive and negative connections, perfect for marine, automotive, RV, and solar systems.

## Overview

The Joinfworld 400A Bus Bar is a heavy-duty 12V power distribution block designed for high-current applications up to 400 amps. Featuring an 8mm thick copper bus bar, stainless steel studs, and a secure nylon base, it supports both positive and negative connections with 4 large 3/8" studs and 3 M5 screw terminals. Its protective cover and nuts enhance safety by reducing short circuit risks, making it ideal for marine, automotive, RV, and solar power systems.

## Description

Product Description Heavy Duty 400A Power Distribution Block 400A Heavy Duty: The 12V Bus Bar rated 400A, besides, this power distribution block can work with MAX 48V DC & 300V AC. 3/8" Stud Terminal - The battery copper bus bar terminal block includes 4 x 3/8" studs and 3 x #10(M5) screw terminals, which makes the 12V junction block able to accept larger size terminal connectors and wires. Product Details Display 3/8" Stud Terminal The 12v bus bar is 4 x 3/8"(M10) studs and 3 x #10(M5) screw terminals design, can allow max 400A current pass through the battery terminal block. 8mm Thickened Copper Bar Our 400A bus bar comes with 8MM Thicker Copper Bus Bar Plate, which can be connected to wider range of cables and withstand up to 400A 48V DC/300V AC. Protect Cover & Nuts Each buss bar 12v will come with a cover and two nuts, which will reduce the risks of short circuit or touch. It also makes the wiring neat and clean. Solid Nylon Base The nylon bottom is secured by 3/8"(M10) post stud, which is more fixed and won't strip. OURS vs OTHERS

Review: All good - Very good
Review: No complaints - Only used the positive bar so far .. seems like good quality.. exactly what I needed for multiple power pickups on my car

## Features

- Heavy Duty: This 12 volt marine bus bar is 400A large current design, heavy duty positive and negative busbar for max 48V DC or 300V AC systems.
- Superior Material: The 400A bus bar terminal block features 8mm(0.32") thicker copper bus bar plate with stainless steel studs and nuts. Red Positive Busbar and Black Negative(Ground) bus bar as a pair.
- 3/8" Stud Terminal: The battery copper bus bar terminal block includes 4 x 3/8" studs and 3 x #10(M5) screw terminals, which makes the 12V junction block able to accept larger size terminal connectors and wires. The nylon bottom is also secured by M10 post which makes it more fixed and won't strip.
- Unique Cover & Nuts: Each power busbar will come with a protect cover and two nuts, which helps to shelter as much exposed area as possible to reduce the risks of accidental contact and prevent short circuit, makes the circuit safer.
- Wide Application: The 12 volt buss bar with cover aims to make the wiring of circuit become neat and tidy, preventing mess harness from causing electric short circuit, it is suitable for automotive, car, truck, marine, boat, solar wiring.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0G2LGXVJ8 |
| Best Sellers Rank | 29,149 in DIY & Tools ( See Top 100 in DIY & Tools ) 22 in Terminal Blocks (DIY & Tools) |
| Brand | Joinfworld |
| Connector Type | Screw |
| Connector type | Screw |
| Country Of Origin | China |
| Current Rating | 400 Amps |
| Current rating | 400 Amps |
| Customer Reviews | 4.5 out of 5 stars 71 Reviews |
| Included Components | one positive bus bar and one ground bus bar |
| Item Dimensions W x H | 16.5W x 4.9H centimetres |
| Manufacturer | Joinfworld |
| Manufacturer Part Number | BB400-T4M10S3-C-BR-2 |
| Model Number | B0G2LGXVJ8 |
| Number Of Contacts | 7 |
| Number Of Poles | 7 |
| Number of Positions | 7 |
| Number of contacts | 7 |
| Number of poles | 7 |
| Product dimensions | 16.5W x 4.9H centimetres |
| Specification Met | CE |
| Unit Count | 1.0 count |

## Images

![Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative - Image 1](https://m.media-amazon.com/images/I/71lO4n9o1wL.jpg)
![Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative - Image 2](https://m.media-amazon.com/images/I/71Q7a+8QIGL.jpg)
![Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative - Image 3](https://m.media-amazon.com/images/I/71kxtEMPJGL.jpg)
![Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative - Image 4](https://m.media-amazon.com/images/I/81rF0dzjQLL.jpg)
![Joinfworld 400A Bus Bar 12V,4 x 3/8" (M10) Studs and 3 x M5 Screw Terminals | Heavy Duty Power Distribution Block,12 Volt Bus Bar for Marine, Boat, Automotive, RV, Solar System, Positive & Negative - Image 5](https://m.media-amazon.com/images/I/711CGc+TqML.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ All good
*by I***S on 4 June 2026*

Very good

### ⭐⭐⭐⭐⭐ No complaints
*by M***C on 25 June 2025*

Only used the positive bar so far .. seems like good quality.. exactly what I needed for multiple power pickups on my car

### ⭐⭐⭐⭐ Great 400 amp buss bar set
*by R***A on 17 July 2026*

The Joinfworld Heavy Duty 400A Bus Bar is a great heavy duty buss bar but it is a little expensive compared to other option. Honestly it probably worth 5 stars but I’m going to give it 4 out of 5 just for pricing .

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-26*