Blue Bar 150A M8 Busbar – 5 Stud with Clear Cover – Red, Black or Pair

150A M8 Busbar with Clear Cover

This 150A M8 busbar gives you one solid distribution point instead of a pile of lugs stacked on a battery terminal. Five M8 stainless steel studs take your feeds and loads, so a fridge, lighting, inverter, DC-DC charger or accessory circuits can all land in one tidy spot. It comes in red for positive and black for negative, or as a matched pair. The clear push-on cover keeps the live studs covered while letting you check every connection at a glance.

Key features

• 5 × M8 studs in 304 stainless steel: suit standard 8mm-hole cable lugs
• Rated 150A at 12V: plenty of headroom for typical auxiliary distribution
• 12V and 24V compatible: 48V DC maximum
• Nickel-plated brass bridge plate joining all five studs
• Insulated polypropylene base: red positive or black negative, so the polarity is obvious
• Clear push-on cover: covers the studs and lets you see the connections
• Recessed mounting holes: screws down flat to a panel, drawer system or battery box
• Buy single or as a pair: grab just the side you need, or both for a new build

Specifications

What’s in the box

Each busbar comes with:

• 1 × busbar assembly with 5 × M8 studs
• 5 × M8 locking nuts
• 1 × clear push-on cover
• 2 × mounting screws

The pair includes one complete red set and one complete black set.

What the M8 busbar suits

• Dual battery systems in 4WDs and utes
• Caravan, camper trailer and motorhome 12V wiring
• 24V truck and lithium house-battery systems
• Canopy and drawer system power builds
• Common negative points so earths aren’t stacked on the battery or chassis

Fuse each outgoing circuit to suit its cable. A busbar distributes power but doesn’t protect it.

Built to spec. Made for the track.

Frequently asked questions

What is a 150A M8 busbar used for?

A 150A M8 busbar gives you one common connection point for multiple 12V circuits, so you aren’t stacking lugs on a battery post. It keeps dual battery, caravan and 4WD wiring tidy, easier to trace, and easier to add to later.

What size cable lugs fit this busbar?

It takes lugs with an M8 (8mm) hole. Choose the lug barrel to match your cable size; the stud size stays the same.

What’s the difference between the red and black versions?

Red is for positive (+) distribution and black is for negative (−). Most new setups need one of each, which is why we sell them as a matched pair as well as singles.

Does it come with a cover?

Yes, every busbar comes with a clear cover. It covers the live studs while letting you see your connections without removing it.

Do I still need fuses with a busbar?

Yes. A busbar distributes power but doesn’t protect circuits. Fuse the feed to the positive busbar, and fuse each outgoing circuit to suit its cable size and load.

How many connections does it have?

It has five M8 studs. You can use one as the main feed from the battery and the other four for outgoing circuits.

Can I use this busbar on a 24V system?

Yes. It’s rated to a maximum of 48V DC, so it suits both 12V and 24V systems. The 150A current rating is quoted at 12V.

What comes with the busbar?

Each busbar comes with five M8 locking nuts, a clear push-on cover and two mounting screws. The pair includes a full set for both the red and the black busbar.