300A 4-Stud Bus Bars – Distribution Block w/Cover – Red/Black

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One of our all-time most popular products! Enhance your power distribution system with our high-performance 300A 4-Stud Bus Bar. Designed to streamline and organize electrical connections, these reliable and versatile bus bars are suitable for a wide range of applications. Whether you’re working on a marine project, automotive wiring, or any other electrical setup, our bus bars provide a robust and efficient solution.


  • 4 stainless steel 3/8″ studs
  • 6 stainless steel screws (#8-32)
  • Tin-Plated contact plate
  • Stainless steel hardware
  • Useable in marine environments
  • Detachable cover included 
  • Measures approximately 1 & 1/4” Wide x 2 & 1/4” Tall x 6 & 5/16” Long
  • 300 Amps continuous current on stud connection
  • 900 Amps surge for engine cranking
  • 20 Amps continuous on screw connection
  • Voltage Range: 0-64V DC
  • Terminal Torque: 10 ft·lbs.

**We recommend a small amount of nickel anti-seize be applied to the threads to prevent galling.**



Upgrade Your Power System with our High-Performance 300A 4-Stud Bus Bars!

Upgrade your power distribution system with our 300A 4-Stud Bus Bars. Experience efficient current transfer, durability in extreme conditions, and convenient color coordination for easy identification of power connections. With its detachable cover for added protection, this bus bar is a reliable and versatile choice for your electrical needs!

Efficient Power Distribution

With four stainless steel 3/8″ studs and six stainless steel screws (#8-32), our bus bars offers exceptional power distribution capabilities. It allows you to connect multiple electrical components effortlessly, providing a centralized hub for your power needs.

Optimal Current Transfer and Durability

Engineered with a tin-plated contact plate, our bus bar ensures optimal current transfer while offering excellent weather resistance. It enables a reliable and efficient flow of electricity, minimizing power loss and maximizing performance. The stainless steel hardware further enhances durability, making it suitable for extreme conditions and marine environments.

Color Coordination for Easy Identification

Available in both black and red variants, our bus bar allows for easy color coordination of positive and negative power connections. This feature simplifies the wiring process and helps prevent errors, ensuring a safer and more efficient electrical setup.

Protective Cover Included

To safeguard your connections from dust, debris, and accidental contact, our bus bar comes with a detachable cover. This cover provides an additional layer of protection, ensuring the integrity and longevity of your electrical system. Combine them with our Silicone Battery Terminal Covers for extra protection! 

Recommended Accessories:

Additional information

Weight 1.24 lbs
Dimensions 10 × 8 × 2 in

2 reviews for 300A 4-Stud Bus Bars – Distribution Block w/Cover – Red/Black

  1. Dan Casey (verified owner)

    I received these with fast shipping and a great deal !…. These buss bars are heavy duty and very well built

  2. tony (verified owner)

    solid built.. I”m buying second set today.

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