3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws
Exploded view of 3/8" M10 bus bar with red and black protective covers, terminal studs, and mounting screws.
Red and black 3/8 inch M10 bus bar terminal blocks for 250A 12V-48V DC electrical wiring systems.
Collage showing wide application of 250A bus bar in boats, cars, golf carts, RVs, solar systems, and car audio.
3/8 inch M10 bus bar with red protective cover, nylon base, and stainless steel studs.
Black and red 250A bus bars with 3/8 inch M10 studs for 48V DC power distribution applications.
Comparison chart showing BlueStars 3/8" M10 bus bar features versus generic alternatives.
Father and son working on a car engine to represent the reliable application of a 250A bus bar electrical solution.
Exploded view of 3/8" M10 bus bar with red and black protective covers, terminal studs, and mounting screws.
Red and black 3/8 inch M10 bus bar terminal blocks for 250A 12V-48V DC electrical wiring systems.
Collage showing wide application of 250A bus bar in boats, cars, golf carts, RVs, solar systems, and car audio.
3/8 inch M10 bus bar with red protective cover, nylon base, and stainless steel studs.
Black and red 250A bus bars with 3/8 inch M10 studs for 48V DC power distribution applications.
Comparison chart showing BlueStars 3/8" M10 bus bar features versus generic alternatives.
Father and son working on a car engine to represent the reliable application of a 250A bus bar electrical solution.

3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws

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3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws

Key Features

  • Maximum Amperage: 250A DC
  • Maximum Voltage: 48V DC / 300V AC
  • Main Terminal Stud: 1 x M10 (3/8") stainless steel
  • Distribution Terminals: 3 x #8 (M4) stainless steel screws
  • Base Material: Glass fiber-reinforced nylon for insulation and strength
  • Contact Plate: Nickel-plated brass for high conductivity and corrosion resistance
  • Includes a removable cover to protect connections from accidental contact

Replaces / Cross-Reference Part Numbers

  • This is a universal power distribution block. Verify specifications for direct replacement.
  • Suitable replacement for any bus bar rated for up to 250A with one M10 (3/8") main stud and three #8 screw terminals.

Compatibility & Fitment

  • Automotive 12V and 24V systems for accessories and high-current devices
  • Marine electrical systems for boats and yachts
  • RV, camper, and travel trailer power distribution panels
  • Off-grid solar power systems and battery banks
  • Golf carts and other electric utility vehicles
  • Industrial equipment requiring a centralized power or ground connection point

When to Replace

  • Visible corrosion, pitting, or arcing marks on the studs or bar
  • Physical damage such as a cracked base or bent studs
  • Overheating under normal electrical load
  • High resistance or significant voltage drop measured across the bar
  • When upgrading system components to handle higher amperage

Installation Tips

  • Disconnect the negative terminal of the battery bank before beginning installation.
  • Ensure the mounting surface is clean, flat, and structurally sound.
  • Use properly sized and crimped ring terminals for all cable connections.
  • Secure main stud nut and terminal screws to the appropriate torque specification to prevent loose connections.
  • For marine or high-moisture environments, consider applying a dielectric grease or corrosion inhibitor to terminals after tightening.
  • Verify all connections are secure before re-installing the protective cover and reconnecting power.
3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 1
3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 2
  • 3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 1

    Fixing symptoms

    Fix the following symptoms: loss or flickering power, hard-to-start engine, battery drain, overheating of wires, messy wiring system, etc
  • 3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 2

    Protective Cover & Nuts

    Each junction block comes with a sturdy cover and two nuts, reducing the risks of short circuits or accidental touch
  • 3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 3

    SAVING SOLUTION

    Enjoy our great-value package with all you need to optimize electrical systems - BlueStars brings DIY solutions to help you deal with any trouble
  • 3/8" (M10) Bus Bar 250A 12V DC Max 48V DC, 3 x #8 Screws 4

    SIMPLE INSTALLATION

    Allow effortless attachment and detachment of mounting and cable termination in any orientation, saving time with a 5-minute quick fix
150% MORE DURABLE

150% MORE DURABLE

Built with strictly-inspected materials to withstand high loads, severe temperatures and external factors

#1 SOURCE OF HIGH-QUALITY REPLACEMENT PARTS

#1 SOURCE OF HIGH-QUALITY REPLACEMENT PARTS

Enjoy your life with our part inside

Compatible Models

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Current Rating
250 Amps
Connector Type
Screw
Number Of Contacts
12
Mounting Type
DIN Rail Mount
Material
Stainless Steel
Brand
BlueStars
Voltage
48 Volts
Number Of Poles
6
Product Dimensions
6.6"W x 1.7"H
Centerline Length
6.6 Inches
Upper Temperature Rating
85 Degrees Celsius
Manufacturer
BlueStars
Item Weight
1.08 pounds

FAQs

This bus bar is rated for a maximum of 250A continuous current. It is designed for use in 12V DC systems and can handle up to a maximum of 48V DC.
The unit features two 3/8" (M10) stainless steel studs for high-amperage main connections and three #8-32 terminal screws for smaller gauge auxiliary wires.
This bus bar is ideal for consolidating multiple ground or power wires in automotive, marine, and solar power systems. It is commonly used to organize wiring in RVs, boats, and off-grid battery banks where high-current distribution is required.
Ensure that your wire gauge is appropriate for the 250A load. Always use proper ring terminals for the M10 studs and ensure all connections are torqued properly to prevent high-resistance heating. It is also recommended to use a protective cover if the bus bar is installed in an area exposed to accidental contact or debris.
Standard terminal blocks are often limited to low-amperage control signals. This bus bar is specifically engineered with heavy-duty studs to handle high-amperage loads, providing a secure, low-resistance junction point for primary power distribution or common grounding.