300A 12V Heavy Duty Distribution Block Busbar Box – M8 or M10 (Red / Black)

High-Amperage Power Distribution for Campervan, Marine, RV & Off-Grid Systems

This heavy duty 300A distribution block busbar box provides safe, reliable power distribution for 12V, 24V and 48V DC electrical systems. Designed for demanding automotive, marine, campervan, motorhome, RV and off-grid solar installations, it delivers high current capacity with strong mechanical durability and enhanced safety features.

Rated for 300A at up to 48V DC (300V AC), the busbar is available with 4 x M8 (5/16″) or 4 x M10 (3/8″) terminal studs, making it suitable for heavy gauge battery cables and high-current connections. The nickel-plated brass contact plates ensure excellent conductivity and low resistance, while the flame-retardant base and protective cover improve safety in high-load environments.

Technical Specifications:

Terminal Studs:

4 x M10 (3/8”) or 4 x M8 (5/16″)

Stud Material:

Stainless Steel

Base Material:

Nylon & Fibreglass

Max Operating Voltage:

48V DC

Continuous Current Rating:

300 AMP

Available Colours:

Black / Red

Dimensions:

L 138mm x W69mm x H45mm