







⚡ Power up your projects with the ultimate heavy-duty bus bar—compact, tough, and ready to connect!
The Gloaso 12V-48V DC 300A Heavy Duty Busbar Box is a premium power distribution solution featuring a fiberglass reinforced nylon base and cover, brass bus plates, and stainless steel studs. Designed for high-current applications up to 300 amps, it supports multiple 3/8" terminal connections with corrosion-resistant hardware, making it ideal for automotive, marine, solar, and off-grid electrical systems. Its compact design with removable side windows ensures easy installation and maintenance, while eco-conscious materials and certifications guarantee safety and sustainability.
















| ASIN | B0CLC96L2Q |
| Best Sellers Rank | #104 in Distribution Connecting Blocks #1,021 in Audio & Video Distribution Products |
| Brand | Gloaso |
| Centerline Length | 5.47 Inches |
| Color | 300A- 4x3/8" (M10) - Black& Red 2pack |
| Connector Type | Stud |
| Current Rating | 300 Amps |
| Customer Reviews | 4.6 4.6 out of 5 stars (359) |
| Date First Available | October 19, 2023 |
| Item Weight | 14 ounces |
| Item model number | C360-300A-M10-BR |
| Manufacturer | Gloaso |
| Material | Base & Cover Material: Glass Fiber reinforced Nylon, Bus Material: Brass, Nickel plated, Stud Material: Stainless Steel |
| Mounting Type | Surface Mount |
| Number Of Contacts | 4 |
| Number Of Poles | 4 |
| Product Dimensions | 5.43"W x 1.75"H |
| Specification Met | CE, RoHS |
| Voltage | 48 Volts (DC) |
A**T
Zero complaints! Very nice bus bar!
I was hoping to find a solution for a tight space in a solar generator I'm building. The bus bars I ordered originally are long and take up an awkward amount of space and I went on the hunt for a better solution. This bus bar isn't cheap, but it's perfect! It's not overpriced, compared to other specialty type electrical components. Still, at around $45, they're obviously proud of their product (and they should be). The plastic housing feels extremely durable, it's clearly fiberglass reinforced. I had to go back and re-read the ad, and yep, they call it 'fiber and reinforced nylon.' The gauge of the steel used for the plate and the 3/8" lugs, I have no doubt that it can handle 400 amps. The max I'll ever place on it is 200 amps, it's a fused system. This was the ONLY bus bar I could find that was as compact as it is, but still had 8 x 3/8" lugs and I'm extremely glad that these turned out to be so nice.
G**S
This Heavy Duty Bus Bar, Saves Time and Money.
Designing a solar charging system with multiple batteries was a breeze with this 600 Amp bus bar. You don't want to risk the chance of using substandard materials and that is why, after much research, I purchased this product. One look and I could immediately tell it is made with the highest quality materials. The way it is designed lends itself to safety and a robust mounting ensures it will stay put. The covers are easily removable but also provide short protection when installed. It saved me time and money by reducing the lengths of wire I had to run when designing and building my solar charging project. Highly recommended.
D**E
Very nice distribution block!
Product is very durable and well made! Would definitely recommend!
A**R
Seems decent
Seems pretty solid so far, just installed it. It is oversized for my setup, not expecting issues. I wish the screws were captive in the covers. If I were going to do it again, Id put tape over the nuts on the back so they don't fall out while positioning things
J**Z
Great performance
Excellent choice for anyone needing reliable and robust power distribution. High-quality copper. Excellent conductivity and durability. Installation is straightforward. Heavy-duty construction. This bus bar offers great performance and value for its price.
X**E
Wow
Wow! Construction quality is unsurpassed, really nice and heavily made, I like the fact that the terminal covers are secured with fasteners for safety. And speaking of the covers, they are nice and thick, not just a flimsy snap on cover. I was pleasantly surprised by this product. Highly recommend
K**Y
Just what I needed
I needed a way to have auxiliary terminals upfront as my battery bank is at the rear of the vehicle . This is definitely quality and recommended just make sure you have three-quarter inch terminal ready
S**Z
Looks and feels like a quality product.
Using two of these to distribute power for a multi-amp/multi-battery audio setup in an enclosed pontoon boat. Two amps, two batteries, two dual USB ports and a power supply/battery charger are connected to the bus bars. The install isn't finished yet but they seem to be of high quality and I have tightened and loosened the bolts many times without any issues. Potential current draw will be 160A so these should handle that with no problem. Will update/add pics once completed and tested.
F**T
Really good quality with a real high Amp rating for the whole bus bar, unlike cheaper ones that divide the rating between the terminals. This is very much so worth the money. You can tell immediately by the weight that they are of superior quality. Up for the job needed.
J**R
Bra stabilt produkt. Bara att den inte finns med fler kontakte i lådan är lite hemsk.
J**R
Schneller Versand
A**.
Perfetto per nodi elettrici importanti: questo l'ho usato come barra di connessione fra una batteria Lifepo4 24V e un inverter ibrido (con potenza nominale massima di 4.2kW) e mi ha permesso di fare un'installazione molto pulita
C**I
Perfect
Trustpilot
3 days ago
4 days ago