---
product_id: 734494526
title: "Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16\" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black)"
brand: "uckasayfy"
price: "B/.65"
currency: PAB
in_stock: true
category: "U Ckasayfy"
url: https://www.desertcart.com.pa/products/734494526-heavy-duty-bus-bar-300a-12v-power-distribution-block-5
store_origin: PA
region: Panama
---

# 300A max current capacity V-0 flame-retardant nylon housing 4 x 5/16" (M8) stud terminals Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black)

**Brand:** uckasayfy
**Price:** B/.65
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your setup with the ultimate heavy-duty bus bar—where safety meets seamless style!

## Quick Answers

- **What is this?** Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) by uckasayfy
- **How much does it cost?** B/.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/734494526-heavy-duty-bus-bar-300a-12v-power-distribution-block-5)

## Best For

- uckasayfy enthusiasts

## Why This Product

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

## Key Features

- • **Rock-Solid Safety:** Vibration-resistant design with flame-retardant housing ensures ultimate protection and reliability.
- • **Clutter-Free Command:** Keeps your automotive or marine wiring impeccably organized, eliminating messy harnesses.
- • **Effortless Integration:** Four large M8 stud terminals accommodate heavy-gauge wires for clean, centralized connections.
- • **Powerhouse Performance:** Handles a robust 300A current at 12V for seamless high-demand power distribution.
- • **Built to Last & Support:** Premium nickel-plated copper bus bar with dedicated after-sales service for peace of mind.

## Overview

The UCkasayfy Heavy Duty Bus Bar is a 12V, 300A-rated power distribution block featuring a nickel-plated copper bus bar and four M8 stud terminals. Its V-0 flame-retardant nylon housing and vibration-resistant design ensure safe, reliable performance in automotive, marine, and battery systems. Designed to organize wiring efficiently, it offers a durable, high-capacity solution backed by excellent quality control and after-sales support.

## Description

Buy UCkasayfy Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black): Connecting Blocks - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- 【Safety & Reliability】——Engineered for vibration resistance and electrical safety, this distribution block features secure flange nut terminals and a V-0 flame-retardant nylon housing with full protective cover. This robust design effectively prevents terminal loosening and short circuits, delivering worry‑free performance in automotive, marine, and mobile power applications
- 【Premium Conductivity】——At its core is a 6mm-thick nickel-plated copper bus bar for minimal resistance and stable performance, as this 12V bus bar reliably carries a 300A rating at 12V with a maximum voltage of 48V DC
- 【High-Capacity Connections】——Equipped with 4 x 5/16″ (M8) stud terminals. this battery bus bar supports large size terminal connectors and wires to integrate multiple devices into a centralized, space-saving hub for efficient power distribution
- 【Organized Power Solution】——This 12 volt bus bar with cover is the ideal power distribution block to organize messy wiring and prevent a messy harness, being particularly suitable for automotive, car, truck, marine, boat, and solar wiring applications
- 【After-sales Service】——Exquisite craft, strict quality control and excellent after-sales service that is why our products worth your purchase

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJF8V2JW |
| Best Sellers Rank | #59 in Distribution Connecting Blocks |
| Brand Name | UCkasayfy |
| Color | Black |
| Connector Type | Screw |
| Current Rating | 300 A |
| Customer Reviews | 4.3 4.3 out of 5 stars (100) |
| Manufacturer | UCkasayfy |
| Material Type | Brass, Nylon, Stainless Steel |
| Model | 3361c414-bfa4-4363-a9b7-59f46e04d1fc |
| Mounting Type | Rack Mount |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Number of Items | 1 |
| Number of Positions | 4 |
| Part Number | CB003-M8-BK |
| Unit Count | 1 Count |
| Voltage | 12 volts |

## Product Details

- **Brand:** UCkasayfy
- **Color:** Black
- **Connector Type:** Screw
- **Current Rating:** 300 A
- **Material:** Brass, Nylon, Stainless Steel
- **Mounting Type:** Rack Mount
- **Number Of Contacts:** 4
- **Number Of Poles:** 4
- **Number of Items:** 1
- **Voltage:** 12 volts

## Images

![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) - Image 1](https://m.media-amazon.com/images/I/31Nsf6nW1RL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) - Image 2](https://m.media-amazon.com/images/I/41YO-hFv5JL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) - Image 3](https://m.media-amazon.com/images/I/51hlyaAWbmL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) - Image 4](https://m.media-amazon.com/images/I/41+p-xjIfOL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black) - Image 5](https://m.media-amazon.com/images/I/41wR14pXyrL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this Bus Bar suitable for small solar systems?**
A: Yes, it is well-suited for small solar systems, providing safe and efficient power distribution.

**Q: Can it be used for automotive modifications?**
A: Yes, it can be used for automotive electrical system modifications, but please ensure sufficient installation space.

**Q: What is the current-carrying capacity of the product?**
A: It offers various options ranging from 250A to 600A to meet different power requirements, with excellent load-bearing performance. Please check the bottom of the product details page for specific options.

**Q: Is the product size too large?**
A: The product dimensions are clearly listed on the details page. Please verify the installation space before purchasing.

**Q: Does it support both M8 and M10 bolt specifications?**
A: Yes, the product comes in multiple specifications (e.g., 5/16" M8 and 3/8" M10) to accommodate different needs. Please check the bottom of the product details page for available options.

## Frequently Bought Together

- Heavy Duty Bus Bar 300A 12V Power Distribution Block with 5/16" (M8) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Black)
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**Shop now:** [https://www.desertcart.com.pa/products/734494526-heavy-duty-bus-bar-300a-12v-power-distribution-block-5](https://www.desertcart.com.pa/products/734494526-heavy-duty-bus-bar-300a-12v-power-distribution-block-5)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-10-24*