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Electrical - Busbars, Connectors & Insulators

Marine busbars, connectors, and insulators are essential components for creating safe, organized, and reliable electrical distribution systems onboard your vessel. Engineered for demanding freshwater and saltwater environments, these marine-grade components help manage power connections while providing secure conductivity, protection, and long-lasting performance. From positive and negative busbars, terminal blocks, power posts, cable connectors, distribution blocks, and insulated connection solutions to mounting hardware and protective covers, these products support efficient power distribution for batteries, marine electronics, lighting, pumps, and other onboard systems. Quality busbars and connectors help reduce wiring clutter, improve electrical organization, and provide dependable connections for critical equipment. Whether you're upgrading your boat's electrical system, completing a new installation, or improving power management, the right components help ensure safe and efficient operation on the water. Featuring premium products from trusted marine manufacturers, our Electrical – Busbars, Connectors & Insulators collection delivers the reliability and performance serious boaters expect. Browse our selection today and let our knowledgeable team help you choose the ideal electrical connection solutions for your vessel.

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  • Blue Sea 2018 Dual PowerPost Cable Connectors - 1 X 5/16" - 1 X 3/8" [2018]
    Blue Sea Systems

    Blue Sea 2018 Dual PowerPost Cable Connectors - 1 X 5/16" - 1 X 3/8" [2018]

    $28.26
    $40.99
    $28.26
    Dual PowerPost Connectors Designed for outboard engine installation when factory cables need to be extended Includes one black and one red insulator WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer,...
    $28.26
    $40.99
    $28.26
  • Blue Sea 4010 CableCap - Red 0.70 to 0.30 Stud [4010]
    Blue Sea Systems

    Blue Sea 4010 CableCap - Red 0.70 to 0.30 Stud [4010]

    $5.64
    $7.06
    $5.64
    4010 CableCap - Red 0.70 to 0.30 StudFeatures:Insulate stud type connectors on alternators, starters, windlasses and other high amperage devicesWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or...
    $5.64
    $7.06
    $5.64
  • Blue Sea 2510 Terminal Block 30AMP - 10 Circuit [2510]
    Blue Sea Systems

    Blue Sea 2510 Terminal Block 30AMP - 10 Circuit [2510]

    $16.95
    $24.02
    $16.95
    2510 Terminal Block 30AMP - 10 CircuitFeatures: Closed back design completely insulates power from the mounting surface Each screw pair is 1 isolated circuit Jumpers allow creation of common circuit WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known...
    $16.95
    $24.02
    $16.95
  • Blue Sea 2506 Terminal Block 30AMP - 6 Circuit [2506]
    Blue Sea Systems

    Blue Sea 2506 Terminal Block 30AMP - 6 Circuit [2506]

    $12.71
    $18.37
    $12.71
    2506 Terminal Block 30AMP - 6 CircuitFeatures: Closed back design completely insulates power from the mounting surface Each screw pair is 1 isolated circuit Jumpers allow creation of common circuits WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known...
    $12.71
    $18.37
    $12.71
  • Blue Sea 2504 Terminal Block 30AMP - 4 Circuit [2504]
    Blue Sea Systems

    Blue Sea 2504 Terminal Block 30AMP - 4 Circuit [2504]

    $9.88
    $14.12
    $9.88
    2504 Terminal Block 30AMP - 4 CircuitFeatures: Closed back design completely insulates power from the mounting surface Each screw pair is 1 isolated circuit Jumpers allow creation of common circuits WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known...
    $9.88
    $14.12
    $9.88
  • Blue Sea 9216 Terminal Block Jumper f/2600 Series Blocks - *Package of 5* [9216]
    Blue Sea Systems

    Blue Sea 9216 Terminal Block Jumper f/2600 Series Blocks - *Package of 5* [9216]

    $7.06
    $8.47
    $7.06
    9216 Terminal Block Jumper for 2600 Series Blocks - Package of 5Features: Jumpers allow creation of common circuits on independent connectors Fits 65AMP terminal blocks (2600 Series) WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State...
    $7.06
    $8.47
    $7.06
  • Blue Sea 2718 Maxibus Cover f/2105 & 2106 [2718]Blue Sea 2718 Maxibus Cover f/2105 & 2106 [2718]
    Blue Sea Systems

    Blue Sea 2718 Maxibus Cover f/2105 & 2106 [2718]

    $43.82
    $63.61
    $43.82
    Maxibus CoverPart# 2718Cover for 2105 & 2106WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
    $43.82
    $63.61
    $43.82
  • Blue Sea 2715 Cover f/BusBar 2301 2303 [2715]
    Blue Sea Systems

    Blue Sea 2715 Cover f/BusBar 2301 2303 [2715]

    $7.06
    $8.47
    $7.06
    2715 Cover for BusBar 2301 & 2303Features:Weight: 0.08lb (0.04 kg)WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
    $7.06
    $8.47
    $7.06
  • Blue Sea 2151 Terminal Fuse Block - 3/8" Mounting Hole - 2 Terminal Studs [2151]
    Blue Sea Systems

    Blue Sea 2151 Terminal Fuse Block - 3/8" Mounting Hole - 2 Terminal Studs [2151]

    $57.95
    $79.16
    $57.95
    2151Features: New isolated stud design uses standard 5/16" hardware and permits stacking of terminals Compact, high-amp fuse-Appropriate for DC Main, inverter, windlass, and bow thruster circuit protection Provides high current protection in tight space constraints Weatherproof-suitable for small open-cockpit boats and other harsh environments...
    $57.95
    $79.16
    $57.95
  • Blue Sea 2300 150AMP Common BusBar 10 x #8-32 Screw Terminal w/Cover [2300]Blue Sea 2300 150AMP Common BusBar 10 x #8-32 Screw Terminal w/Cover [2300]
    Blue Sea Systems

    Blue Sea 2300 150AMP Common BusBar 10 x #8-32 Screw Terminal w/Cover [2300]

    $33.92
    $49.47
    $33.92
    2300 150AMP Common BusBar 10 x #8-32 Screw Terminal with CoverFeatures: Stud design provides direct terminal to bus contact for low resistant connection Stainless steel studs and screws allow high torquing for excellent electrical contact Tin-plated copper bus for maximum conductivity and resistance to...
    $33.92
    $49.47
    $33.92
  • Blue Sea 2508 Terminal Block 30AMP - 8 Circuit [2508]
    Blue Sea Systems

    Blue Sea 2508 Terminal Block 30AMP - 8 Circuit [2508]

    $15.54
    $21.19
    $15.54
    2508 Terminal Block 30AMP - 8 CircuitFeatures: Closed back design completely insulates power from the mounting surface Each screw pair is 1 isolated circuit Jumpers allow creation of common circuits WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known...
    $15.54
    $21.19
    $15.54
  • Blue Sea 2302 150AMP Common BusBar 20 x 8-32 Screw Terminal [2302]Blue Sea 2302 150AMP Common BusBar 20 x 8-32 Screw Terminal [2302]
    Blue Sea Systems

    Blue Sea 2302 150AMP Common BusBar 20 x 8-32 Screw Terminal [2302]

    $46.64
    $66.44
    $46.64
    2302 150AMP Common BusBar 20 x 8-32 Screw TerminalFeatures: The industry standard busbar for positive distribution The industry standard busbar for the collection of negative or AC ground circuits Specifications: Max Voltage: 300 V AC 48 V DC Number of Screws: 20 Number of...
    $46.64
    $66.44
    $46.64
  • Sea-Dog Dual Buss Bar w/Cover - 12 Terminals [426693-3]Sea-Dog Dual Buss Bar w/Cover - 12 Terminals [426693-3]
    Sea-Dog

    Sea-Dog Dual Buss Bar w/Cover - 12 Terminals [426693-3]

    $46.64
    $72.04
    $46.64
    Dual Buss Bar with Cover - 12 TerminalsThis dual bus bar is designed for DC positive or negative distribution on one block or AC neutral and safety ground collection on one block. Constructed of corrosion-resistant tin-plated Copper and ABS with a polycarbonate cover.Features: Includes...
    $46.64
    $72.04
    $46.64
  • Blue Sea 4017 Straight Terminal CableCap - Large [4017]
    Blue Sea Systems

    Blue Sea 4017 Straight Terminal CableCap - Large [4017]

    $8.47
    $11.30
    $8.47
    4017 Straight Terminal CableCap - LargeInsulates battery terminals which have standard automotive posts.Features:Designed to fit standard automotive postsWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive...
    $8.47
    $11.30
    $8.47
  • Pacer 16-14 AWG Heat Shrink Ring Terminal - #10 Stud Size - 100 Pack [TE14-10R-100]
    Pacer

    Pacer 16-14 AWG Heat Shrink Ring Terminal - #10 Stud Size - 100 Pack [TE14-10R-100]

    $57.95
    $80.72
    $57.95
    16-14 AWG Heat Shrink Ring Terminal - #10 Stud Size - 100 PackRing terminals are used to connect wires to a connection point. They can easily be used with two or more wires. They offer a solid connection as the ring is fitted over...
    $57.95
    $80.72
    $57.95
  • Pacer 12-10 AWG Heat Shrink Butt Connector - 100 Pack [TBSE10-100]
    Pacer

    Pacer 12-10 AWG Heat Shrink Butt Connector - 100 Pack [TBSE10-100]

    $67.85
    $111.86
    $67.85
    12-10 AWG Heat Shrink Butt Connector - 100 PackButt splices are crimp connectors used to safely connect one or more wires to another wire. Step-down butt splices are meant to connect a higher-gauge wire to a lower-gauge wire. They could also be used to...
    $67.85
    $111.86
    $67.85
  • Blue Sea 4016 Straight Terminal CableCap - Small [4016]
    Blue Sea Systems

    Blue Sea 4016 Straight Terminal CableCap - Small [4016]

    $9.88
    $12.71
    $9.88
    4016 Straight Terminal CableCap - SmallInsulates battery terminals which have standard automotive posts.Features:Designed to fit standard automotive postsWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive...
    $9.88
    $12.71
    $9.88
  • Blue Sea 2102 PowerPost Plus Cable Connector - 5/16" Stud [2102]
    Blue Sea Systems

    Blue Sea 2102 PowerPost Plus Cable Connector - 5/16" Stud [2102]

    $33.92
    $48.06
    $33.92
    2102 PowerPost Plus Cable Connector - 5/16" StudEnables connection of multiple smaller wires in spaces where a traditional bus bar may not fit.Features: 150 Ampere bus allows small wire connections at high amperage cable connections Connects high amperage cables securely Stud dimensions: 5/16" x...
    $33.92
    $48.06
    $33.92
  • Blue Sea 2011 PowerPost Mini High Amperage Cable Connector - 1/4" Stud [2011]
    Blue Sea Systems

    Blue Sea 2011 PowerPost Mini High Amperage Cable Connector - 1/4" Stud [2011]

    $12.71
    $16.95
    $12.71
    2011 PowerPost Mini High Amperage Cable Connector - 1/4" StudInsulated single stainless steel stud terminates multiple large conductors.Features: Connects high amperage cables securely Stud dimensions: 1/4" x 3/4" Base Material is PBT UL94 V0 WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate...
    $12.71
    $16.95
    $12.71
  • Blue Sea 2402 Terminal Black 20AMP - 2 Circuit [2402]
    Blue Sea Systems

    Blue Sea 2402 Terminal Black 20AMP - 2 Circuit [2402]

    $7.06
    $9.88
    $7.06
    2402 Terminal Black 20AMP - 2 CircuitFeatures: Closed back design completely insulates power from the mounting surface Each screw pair is 1 isolated circuit Jumpers allow creation of common circuits WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known...
    $7.06
    $9.88
    $7.06