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

(155 reviews)
Price
$11.34
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(30000 available )
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Reviews

  • Jason R

    > 3 day

    Nice heavy duty

  • Larry d.

    > 3 day

    Very nice. Built good

  • Teresa Gonzalez

    04-04-2025

    Wow these things are very well built, I used these to split some power on my truck to connect a DC/AC inverter and its just what I needed. Quality of the hardware is nice as well, so many times I have bought something and the item itself is great but the hardware the manufacturer puts in the box has to be replaced with better quality, not this.

  • Charlevoix418

    > 3 day

    Quite robust, will last for ever, top quality!

  • bill m.

    > 3 day

    Nice product.

  • Bill G.

    > 3 day

    Busbar is as described.

  • Christopher M.

    05-04-2025

    Substantial.

  • Jonathan W.

    Greater than one week

    Nice power distribution block!

  • Ed Campbell

    > 3 day

    Perfect for my marine application from my batteries

  • SexieWASD

    Greater than one week

    I usually only write reviews if a product stands out eithe in a good way, or exceeds at being terrible, I’m glad I’m writing this one woth five stars at the top. I wasn’t expecting much for 20 bucks, but this is a quality piece, much higher quality then car audio distribution blocks, even from the name brands. It might not be polished to a mirror and weight 40 pounds, but I won’t have to worry about it. I will be buying more.

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

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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.

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