---
product_id: 734498458
title: "Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8\" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red)"
brand: "uckasayfy"
price: "R$443"
currency: BRL
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.br/products/734498458-heavy-duty-bus-bar-300a-12v-power-distribution-block-3
store_origin: BR
region: Brazil
---

# 300A max current capacity V-0 flame-retardant nylon housing 4 x 3/8" (M10) stud terminals Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red)

**Brand:** uckasayfy
**Price:** R$443
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your ride with confidence and style!

## Quick Answers

- **What is this?** Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) by uckasayfy
- **How much does it cost?** R$443 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/734498458-heavy-duty-bus-bar-300a-12v-power-distribution-block-3)

## 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

- • **Safety First:** V-0 flame-retardant nylon cover prevents shorts and enhances electrical safety.
- • **Built to Last:** Premium nickel-plated copper bus bar delivers minimal resistance and long-term reliability.
- • **Streamlined Setup:** Organizes complex wiring into a sleek, centralized hub for automotive and marine systems.
- • **Powerhouse Performance:** Handles a robust 300A current at 12V for uninterrupted power flow.
- • **Rock-Solid Connections:** Four heavy-duty 3/8" (M10) terminals ensure secure, vibration-resistant wiring.

## Overview

The UCkasayfy Heavy Duty Bus Bar is a 12V, 300A power distribution block featuring four 3/8" (M10) stud terminals and a flame-retardant nylon cover. Designed for automotive, marine, and battery systems, it offers vibration-resistant secure connections and premium nickel-plated copper construction for efficient, safe, and organized power management.

## Description

Full description not available

## 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 3/8″ (M10) 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 |
|---------------|-------|
| Current Rating | 300 Amps |
| Connector Type | Screw |
| Number Of Contacts | 4 |
| Mounting Type | Panel Mount |
| Material | Brass, Nylon, Stainless Steel |
| Color | Red |
| Brand | UCkasayfy |
| Voltage | 12 Volts |
| Number Of Poles | 4 |
| Manufacturer | UCkasayfy |
| Package Dimensions | 7.6 x 3.7 x 2.24 inches |
| Item Weight | 14.8 ounces |
| ASIN | B0CJF9ZHBG |
| Item model number | UCkasayfy |
| Date First Available | September 20, 2023 |

## Product Details

- **Current Rating:** 300 Amps
- **Connector Type:** Screw
- **Number Of Contacts:** 4
- **Mounting Type:** Panel Mount
- **Material:** Brass, Nylon, Stainless Steel
- **Color:** Red
- **Brand:** UCkasayfy
- **Voltage:** 12 Volts
- **Number Of Poles:** 4
- **Manufacturer:** UCkasayfy

## Images

![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) - Image 1](https://m.media-amazon.com/images/I/71zIVQ9MbEL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) - Image 2](https://m.media-amazon.com/images/I/61u5+hiq6pL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) - Image 3](https://m.media-amazon.com/images/I/71GWoj3kaWL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) - Image 4](https://m.media-amazon.com/images/I/61sdPbdTqpL.jpg)
![Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red) - Image 5](https://m.media-amazon.com/images/I/61jrSpoCDOL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Heavy duty
*by R***. on June 2, 2025*

Bar was larger than I expected. Exceeded my needs. It is great.

### ⭐⭐⭐⭐⭐ Well made
*by R***S on May 24, 2025*

Well built power distribution bar! Gives me a power point under the hood now that my battery is in the trunk.

### ⭐⭐⭐⭐ Good. Big.
*by B***L on December 10, 2024*

I wanted to get all the pos leads off my battery. I knew this was big but if you actually want to cover up the power rings/connectors the size is needed. Comes with everything you need. I do not like how the top connects. The nuts fit underneath but they will fall right out. I had to wedge them under and then screw the base on, which is trick. I only used two. I also had to break the side center out for the wires to come out the side. After all was done it does the job and looks pro!

## Frequently Bought Together

- UCkasayfy Heavy Duty Bus Bar 300A 12V Power Distribution Block with 3/8" (M10) 4-Posts Terminals Block with Cover for Automotive, Marine, Battery System (Red)
- TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing
- Spartan Power Welding Lead & Car Battery Cable - DIY Bulk Automotive Grade Copper Wire - 600 Volt, 4/0 AWG, 25 Foot, Black

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.br/products/734498458-heavy-duty-bus-bar-300a-12v-power-distribution-block-3](https://www.desertcart.com.br/products/734498458-heavy-duty-bus-bar-300a-12v-power-distribution-block-3)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-23*