Wishlist(0)
koitech-shop.com
Categories See All >

Bay Marine Supply Busbar - Made in USA – 4-Post 250 Amp Stainless Steel Distribution Block - 3/8 Red

(155 Reviews)
Price
$11.34
None
Quantity
(30000 available )
Total Price
Share
55 Ratings
51
4
0
0
0
Reviews

  • Mary

    > 3 day

    Good quality materials, solid built, anti corrosive stainless steel. what more could you ask for?

  • Marcus Strosin

    12-06-2025

    Works great

  • Buy allot of stuff

    > 3 day

    If youre one of those people who have like 10 wires stuffed under one screw for the accessories running in your car then think about running 1 heavy duty cable to one of these bus bars then youll have a nice neat place to get your 12 volt battery power from. This is designed for the positive side or hot side and is isolated from its mounting. What I like about this product is that it has a cover so that you are less likely to touch a terminal and short out or ground unintentionally. This will be good to run some high-draw accessories but not like an automotive starter motor or something directly. Just know this is positive (or negative) only and you will need another for negative side.

  • Israel Larson DVM

    > 3 day

    Used on my race car as a power distribution block in the engine bay. The battery is in the trunk of my car. I used this to power cooling fans, the starter motor, and other accessories in the engine bay. It is nice because it has large 10mm studs for large wires, but also has some smaller phillips screws for smaller power wires and terminals. Has a nice cover with plastic acorn nuts as well. Overall a nice piece and exactly what I needed for my project. I would absolutely buy again.

  • Michael K. Lacy

    > 3 day

    Exactly as advertised and very well made. All attachments came with it a real plus.

  • Mike Douglas

    > 3 day

    The bus was larger than expected when it arrived but is of high quality and worked well in my solar project.

  • Larry d.

    > 3 day

    Very nice. Built good

  • michael n dietz

    Greater than one week

    This is a great buss bars, and the order was handled well.

  • ABE

    > 3 day

    Work as suppose to.

  • angel garcia

    > 3 day

    algo

Bay Marine Supply offers busbars in various sizes to make sure you find the busbar that fits your needs. The busbars are built to last and comes with insulation covers. They are high quality power distribution blocks and allow for multiple connections to positive and negative systems. Each block can maintain multiple connections, making them flexible and robust for a variety of uses. Available in red and black, with your choice of stud sizes. Each purchase comes with complimentary NO-OX-ID electrical grease to help prevent corrosion and galling.

Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 5/16 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 5/16 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 5/16 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 3/8 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 3/8 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point 3/8
4-Post 5/16" (250A) BusBar – Red 4-Post 5/16" (250A) BusBar – Black 4-Post 5/16" (250A) BusBar – Pair of Black & Red 4-Post 3/8" (250A) BusBar – Red 4-Post 3/8" (250A) BusBar – Black 4-Post 3/8" (250A) BusBar – Pair of Black & Red
Model Large 4-Posts Large 4-Posts Large 4-Posts Large 4-Posts Large 4-Posts Large 4-Posts
Color Red Black Pair of Red & Black Red Black Pair of Red & Black
Stud Size Four 5/16" (M8) Studs Four 5/16" (M8) Studs Four 5/16" (M8) Studs Four 3/8" (M10) Studs Four 3/8" (M10) Studs Four 3/8" (M10) Studs
Additional Connection Points Three #8-32 Screws Three #8-32 Screws Three #8-32 Screws Three #8-32 Screws Three #8-32 Screws Three #8-32 Screws
Max Amperage 250 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc
Max Voltage 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc
Dimensions 1.775 x 6.59 x 1.385 inch (1.943 x 6.59 x 1.385 inch with cover) 1.775 x 6.59 x 1.385 inch (1.943 x 6.59 x 1.385 inch with cover) 1.775 x 6.59 x 1.385 inch (1.943 x 6.59 x 1.385 inch with cover) 1.775 x 6.591 x 1.385 inch (2.056 x 6.591 x 1.385 inch with cover) 1.775 x 6.591 x 1.385 inch (2.056 x 6.591 x 1.385 inch with cover) 1.775 x 6.591 x 1.385 inch (2.056 x 6.591 x 1.385 inch with cover)
Plate & Connection Point Material Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts
Base Material Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon
UL Rating UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB
Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point Energy 3/8 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 4 Point Energy 5/16 Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 3 Point Hi-Amp Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 3 Point Hi-Amp Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 10 Point 150A Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 10 Point 150A
Small 4-Post 3/8" (210A) BusBar – Red Small 4-Post 5/16" (210A) BusBar – Black Hi-Amp 3-Point (700A) BusBar – Red Hi-Amp 3-Point (700A) BusBar – Black 10-Point (150A) BusBar – Red 10-Point (150A) BusBar – Black
Model Small 4-Posts Small 4-Posts Hi-Amp 3-Posts Hi-Amp 3-Posts 10-Point 10-Point
Color Red Black Red Black Red Black
Stud Size Three 3/8" (M10) & One 1/4" (M7) Studs Three 5/16" (M8) & One 1/4" (M7) Studs Two 5/16" (M8) & One 3/8" (M10) Studs Two 5/16" (M8) & One 3/8" (M10) Studs Two 1/4" (M7) Studs Two 1/4" (M7) Studs
Additional Connection Points Ten #8-32 Screws Ten #8-32 Screws
Max Amperage 210 Amps @ 12Vdc 210 Amps @ 12Vdc 700 Amps @ 12Vdc 700 Amps @ 12Vdc 150 Amps @ 12Vdc 150 Amps @ 12Vdc
Max Voltage 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc
Dimensions 1.127 x 5.234 x 1.140 inch (1.750 x 7.500 x 2.250 inch with cover) 1.127 x 5.234 x 1.140 inch (1.750 x 7.500 x 2.250 inch with cover) 2.870 x 4.756 x 1.875 inch (1.897 x 5.731 x 3.576 inch with cover) 2.870 x 4.756 x 1.875 inch (1.897 x 5.731 x 3.576 inch with cover) 1.5 x 6.005 x 1.250 inch (1.75 x 7.193 x 1.686 inch with cover) 1.5 x 6.005 x 1.250 inch (1.75 x 7.193 x 1.686 inch with cover)
Plate & Connection Point Material Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts
Base Material Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon
UL Rating UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB
Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 12 Point 240A Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 12 Point 240A Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar 12 Point 240A Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar Dual 4 Point Energy Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar Dual 4 Point Energy Busbar Bay Marine Supply Mobile Power Pros Electrical Distribution Block bus bar Dual 4 Point Energy
12-Point (240A) BusBar – Red 12-Point (240A) BusBar – Black 10-Point (240A) BusBar – Pair of Black & Red Dual 4-Post 5/16" & 5/16" (250A) BusBar – Black Dual 4-Post 5/16" & 3/8" (250A) BusBar – Black Dual 4-Post 3/8" & 3/8" (250A) BusBar – Red
Model 12-Point 12-Point 12-Point Dual 4-Posts Dual 4-Posts Dual 4-Posts
Color Red Black Pair of Red & Black Black Black Red
Stud Size One 1/4" (M7) Stud One 1/4" (M7) Stud One 1/4" (M7) Stud Four 5/16" (M8) & Four 5/16" (M8) Studs Four 5/16" (M8) & Four 3/8" (M10) Studs Four 3/8" (M10) & Four 3/8" (M10) Studs
Additional Connection Points Twelve #8-32 Screws Twelve #8-32 Screws Twelve #8-32 Screws Six #8-32 Screws Six #8-32 Screws Six #8-32 Screws
Max Amperage 240 Amps @ 12Vdc 240 Amps @ 12Vdc 240 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc 250 Amps @ 12Vdc
Max Voltage 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc 48Vdc
Dimensions 1.095 x 5.234 x 1.140 inch (1.095 x 5.5 x 1.25 inch with cover) 1.095 x 5.234 x 1.140 inch (1.095 x 5.5 x 1.25 inch with cover) 1.095 x 5.234 x 1.140 inch (1.095 x 5.5 x 1.25 inch with cover) 1.772 x 5.716 x 2.975 inch (2 x 5.366 x 3.228 inch with cover) 1.772 x 5.716 x 2.975 inch (2 x 5.366 x 3.228 inch with cover) 1.772 x 5.716 x 2.975 inch (2 x 5.366 x 3.228 inch with cover)
Plate & Connection Point Material Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts Nickel Plated Brass Contact Plate & Stainless Steel Connection Posts
Base Material Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon Glass-Filled Nylon
UL Rating UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB UL 94 HB

Busbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus barBusbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus bar

Busbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus barBusbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus bar

Busbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus barBusbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus bar

Busbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus barBusbar Bay Marine Supply Mobile Power Pros Electrical Energy Distribution Block bus bar

Recommended Accessories

Electrical Grease Anti-SeizeElectrical Grease Anti-Seize

Insulator Cap Terminal Connection High Temperature ShortageInsulator Cap Terminal Connection High Temperature Shortage

Power Cable Lugs Lug Bay Marine Ring AWG FTZ Supply Mobile Power Pros Tinned Copper Heavy Duty Power Cable Lugs Lug Bay Marine Ring AWG FTZ Supply Mobile Power Pros Tinned Copper Heavy Duty

Starter Cable Lugs Lug Bay Marine Ring AWG FTZ Supply Mobile Power Pros Tinned Copper Heavy Duty Starter Cable Lugs Lug Bay Marine Ring AWG FTZ Supply Mobile Power Pros Tinned Copper Heavy Duty

Bay Marine Supply Electrical Grease by Sanchem

NO-OX-ID "A-SPECIAL" is the electrical contact grease of choice for new electrical installations and maintenance. NO-OX-ID electrical contact grease is an electrically conductive grease that keeps metals free from rust and corrosion as well as galling. It is recommended for trouble-free joint connections.

Bay Marine Supply Insulation Caps

Insulation caps are used to protect terminal connections from accidental shortages. They are available in different sizes to fit your needs.

Bay Marine Supply Power Lugs by FTZ

These power lugs are made of 99.9% copper, with a substantial tin plating to offer superior corrosion resistance. The cable size is stamped on each lug. They are premium versions of the most common lug specification. An increased in wall thickness yields greater strength and conductivity. The color bands to guide easy double crimps. With wire size and die setting stamped for corresponding battery terminal when used with FTZ Heavy Duty Crimp Tools.

Bay Marine Supply Starter Lugs by FTZ

These starter lugs are made of 99.9% copper, with a substantial tin plating. Unlike many lugs, the pad is a seamless piece for strength, conductivity, and corrosion resistance. The barrel is slightly flared and chamfered for easy wire insertion. The cable size is stamped on each lug. Available for 8 AWG to 4/0 AWG cables.

Related products

Shop
( 1455 Reviews )
Top Selling Products
Home
Categories
Cart (0)
Messages
Account
0 Cart Item (s)

Your Cart is empty