Product Details
BB300-T4M8-C-BR-BOX1 provides 4 x M8(5/16″) stud connections with a 300 A current rating. The stud-only layout suits wiring assemblies built around cable lugs, without adding small screw terminals that are unnecessary for that connection format. Black and red versions share the same connection layout.
BB300-T4M8-C-BR-BOX1 / mixed terminal configuration.
- 01 A consistent stud interface
4 M8(5/16″) studs give the assembly 4 defined lug positions. Using one stud diameter makes the mechanical connection format clear when selecting compatible cable lugs. - 02 A covered terminal area
The protective cover helps shield the connection area from incidental contact. Provide sufficient installation clearance for access to the terminals with the power isolated. - 03 Black and red versions
Black and red versions let wholesalers offer consistent color identification across common supply and return layouts. The electrical connection configuration remains the same for both colors.
Specifications
| Model | BB300-T4M8-C-BR-BOX1 |
| Current rating | 300 A |
| Maximum Voltage | 48 V DC |
| Stud terminals | 4 x M8(5/16″) |
| Bus Bar Material | Nickel Plated Copper |
| Stud Material | Stainless Steel |
| Base Material | UL94-VO Rated, Glass Reinforced Thermoplastics |
| Cover Material | Protective cover |
| Color Versions | Black/Red |
| Overall Dimensions | 138mm x 69mm x 39mm (L x W x H) |
Terminal counts refer to one product assembly. Color versions are not added together. Mounting screws are not counted as electrical screw terminals.
Current rating applies to the product, not to each connection. Provide circuit protection separately. Inch sizes are approximate references, not interchangeable thread specifications.
Compare Connection Layouts and Ratings
Compare this model with other connection formats in the DAIERTEK range. Matching terminal counts do not establish mechanical interchangeability.
| Model | Current rating | Stud terminals | Screw terminals | Layout reference |
|---|---|---|---|---|
| BB300-T4M8-C-BR-BOX1 Current Product |
300 A | 4 x M8(5/16″) | 0 | This product |
| BB100-T4M8-C-BR | 100 A | 4 x M8(5/16″) | 0 | Stud-only layout |
| BB150-T6M6-C-BR | 150 A | 6 x M6(1/4″) | 0 | Stud-only layout |
| BB200-T6M6-B | 200 A | 6 x M6(1/4″) | 0 | Stud-only layout |
| BB300-T6M10-C-BR | 300 A | 6 x M10(3/8″) | 0 | Stud-only layout |
| BB400-T6M8-C-BR | 400 A | 6 x M8(5/16″) | 0 | Stud-only layout |
Counts are totals for each listed assembly. Dual assemblies are not rated by adding two current values. Black/red options do not mean that a pair is supplied.
Common DC Connections in Practice
Typical uses for protected vehicle and onboard electrical installations.
Auxiliary power compartments
The 4 x M8(5/16″) stud layout provides a connection format for a vehicle auxiliary-power assembly. Assess the cable, overcurrent protection and installation conditions independently of the 300 A product rating.
RV and commercial vehicle electrical builds
Use within a protected electrical compartment where cable lugs need defined connection positions. Leave clearance for cable bends and access to the terminals during maintenance.
Application examples describe potential installation contexts, not verified fitment to a particular vehicle. Keep live connections protected from water, conductive debris and accidental contact.
Reference Drawing
Request Technical Documents
