Electronic Connectors | McMaster-Carr

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11,605 Products

Electrical

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

1,073 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

673 products

Electrical Receptacles

Install in a wall or panel to transmit power or data to plugs or sockets

1,008 products

Development Board Cords

Connect your development board to components such as sensors and actuators

7 products

Circuit Board Headers

Make quick connections to development boards and other circuit boards when prototyping

20 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

292 products

Electrical Connector Contacts

Crimp wire into pins and sleeves to create custom Molex or Amphenol connectors

26 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

699 products

Terminals, Ferrules, and Lugs

Attach to the end of wire to connect circuits in control panels, motors, and machinery

1,269 products

Wire Splices, Connectors, and Taps

Join wire and protect the connection

368 products

Wire Splice Covers

Seal out dust and moisture to protect electrical connectors

3 products

Electrical Cords

Connect equipment and devices to a power supply

2,376 products

Electrical Wire

Make single-wire connections; generally for lower voltages and shorter distances than cable

32 products

Distribution Bars

Route electricity within switchboards and battery banks; also known as bus bars

31 products

Electrical Connector Caps

Protect data connectors when not in use

78 products

Terminal Splitters

Divide one male quick-disconnect connection into two

4 products

Terminal and Splice Kits

Maintain a supply of extra terminals and splices to join and terminate wire

17 products

Distribution Blocks

Distribute electricity from a single power source to several devices in a circuit

47 products

Data Connection Hubs

Add USB, DisplayPort, or HDMI ports to your computer to connect multiple device

28 products

Distribution Posts

Send power from one source to several devices in a circuit in less space than a distribution block

4 products

Electrical Connector Seals

Add to the front or back of connectors to block out dust, debris, and weather

5 products

Electrical Connector Boots

Protect connectors and cords from strain, bends, and pulls

2 products

Outlet Strips

Plug in multiple devices to power them from a single outlet

121 products

Electrical Cord Locks

Cover mated connectors on extension cords to prevent disconnection

2 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Jumper Cables

Jump-start a dead battery

12 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Electrical Cable

Make multi-wire connections; generally for higher voltages and longer distances than wire

53 products

Slip Rings

Maintain an electrical link between a moving part and a stationary part

4 products

Electrical Connector Thread Adapters

Join two connectors that both have internal threads

6 products

Circuit Boards

Create your own circuit board designs by adding components

72 products

Development Boards

Prototype electronics and build simple automation systems by configuring inputs and outputs

43 products

Single-Board Computers

Combine the functionality of a PC with the flexibility of a development board’s inputs and outputs

17 products

PLCs

Program complex automation jobs by combining the functionality of a relay, timer relay, and switch

9 products

Ethernet Switches

Expand your data network by connecting computers, printers, and servers

68 products

Electronic Lead Benders

Make 90° bends in resistors, diodes, and other small components

3 products

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

2 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Computers

Sturdy and reliable for harsh industrial jobsites, from frigid freezers to sweltering foundries

12 products

Wire and Cable Crimpers

Crimp connectors onto electrical wire or cable

2 products

Battery Jump Starters

Clamp to large-cell batteries to start vehicles and machines when you don't have access to an outlet

5 products

Battery Connectors

Quickly make and break connections between a battery and a charger or equipment

43 products

Battery Terminal Fasteners

Replace bolts in battery terminals

3 products

Battery Terminal Adapters

Convert one battery terminal style to another

6 products

Battery Chargers

Charge everything from large-cell to cordless tool to household batteries

59 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

60 products

Battery Terminals

Connect cable to battery posts to power vehicles and machines

131 products

Circuit Board Capacitors

Store electrical energy then release it all at once to briefly boost power to circuit boards

59 products

Resistors

Limit the electrical current flowing through circuits, adjust signal levels, and divide voltages

491 products

Grounding Lugs

Create a common grounding path for internal components and circuits, as well as the enclosure body

1 product

Circuit Board Voltage Regulators

Power circuits from a high-voltage source without frying your system

15 products

Varistors

Protect sensors, programmable logic controllers, and other small components from electrical surges

20 products

Diodes

Route current in one direction and block it in the other to protect sensitive electronics

93 products

Outlet Boxes

House electrical components such as on-off switches, receptacles, and dimmer knobs

5 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

1,189 products

Electronic Component Kits

Include diodes, rectifiers, and transistors to convert current or amplify electronic signals

2 products

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

120 products

Interference Suppressing Clips

Shield cable from EMI and RFI that can distort signals; also known as ferrite beads

64 products

Transformers

Raise or lower voltage to meet the needs of an individual circuit

237 products

Rectifiers

Convert AC voltage to a constant DC voltage on a circuit board

30 products

Inductors

Resist changes in current to protect circuit board components from surges

15 products

Light Switch/Receptacles

Combine a switch and receptacle into a single outlet box for a small footprint

2 products

Measuring and Inspecting

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

41 products

Patch Cords

Make point-to-point connections between electrical testing equipment and your devices

12 products

BNC Test Cords

Connect oscilloscopes and other testers to your equipment

4 products

Power Consumption Meters

Measure the amount of power your devices consume to help calculate energy costs

1 product

Decade Boxes

Test and troubleshoot circuits without needing to solder capacitors or replace resistors

3 products

Load Cell Junction Boxes

Join multiple load cells to combine their weight measurements

2 products

Inertial Measurement Units

Mount to robot arms, cranes, and vehicles to accurately track their movements

1 product

Fabricating and Machining

Electronic-Component Positioning Stands

Pin components against a circuit board to free up your hands for soldering

1 product

Lighting

Light Bulbs

Standard household, miniature, compact, tubular, ultraviolet, infrared, and blacklight bulbs

26 products

Light Transmitters

Light up small and hard-to-reach areas such as the inside of models, prototypes, and circuit boards

18 products

Light Pipes

Concentrate and direct light from the bulb on a circuit board to a display

16 products

Fastening and Joining

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

2 products

Welding Lug Covers

Install over welding lugs to prevent accidental contact with other connections

1 product

Welding Lugs

Screw, hammer, or crimp on to secure welding cable connections

13 products

Material Handling

Vacuum Lifters

Grip and move objects with air- or electric-powered suction

13 products

Building and Machinery Hardware

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

70 products

Communication

Display Screens

Display text, numbers, symbols, and other information from your electronics

27 products

Computer Monitors

Display information in tough conditions such as on factory floors and outdoor jobsites

9 products