Circuit Connectors | McMaster-Carr

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2,445 Products

Electrical Power, Networking, and Controlling

Molex Connectors

Plugs, sockets, and housings for making Molex connections

47 products

USB Connectors

Plugs, sockets, receptacles, and adapters to make USB connections

14 products

Amphenol Connectors

Attach wires to a circuit board

32 products

D-Sub Connectors

Plugs, sockets, receptacles, and adapters for connecting computers, monitors, and printers

18 products

Power Receptacles

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

15 products

Terminal Blocks

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

699 products

Wire Splices, Connectors, and Taps

Join wire and protect the connection

6 products

Terminals, Ferrules, and Lugs

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

1,248 products

Terminal and Splice Kits

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

17 products

Terminal Splitters

Divide one male quick-disconnect connection into two

4 products

Distribution Blocks

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

39 products

Distribution Bars

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

31 products

Distribution Posts

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

4 products

Terminal Adapters

Convert wire terminals from one connection type or gender to another

7 products

Welding Lug Covers

Install over welding lugs to prevent accidental contact with other connections

1 product

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

13 products

Circuit Board Cords

Short lengths of terminated wire make temporary connections on circuit boards

24 products

Wrap Wire

Wrap around a circuit board post terminal without the need for soldering

11 products

Circuit Board Headers

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

20 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Circuit Board Voltage Regulators

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

15 products

Circuit Board Cable

Flat and flexible, connect circuit boards inside electronic devices

20 products

Grounding Lugs

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

1 product

Battery Terminals

Connect cable to battery posts to power vehicles and machines

129 products

Jumper Cords

Ready to connect with a terminal at one or both ends

10 products

Fastening and Joining

Welding Lugs

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

13 products