Circuit Boards | McMaster-Carr

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5A992

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1,586 Products

Electrical Power, Networking, and Controlling

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

28 products

Single-Board Computers

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

19 products

Circuit Board Headers

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

20 products

Development Board Holders

Keep a development board and breadboard in one spot for prototyping

1 product

Development Board Sensor Modules

Transform your development board into everything from an airflow monitor to a motion detector

17 products

Development Board Programming Modules

Program development boards and other custom circuit boards

3 products

PLCs

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

7 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Circuit Board Enclosures

Hold circuit boards to protect them from dust, liquids, or overheating

82 products

Development Board Cords

Connect your development board to components such as sensors and actuators

7 products

Circuit Board Capacitors

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

59 products

Circuit Board Voltage Regulators

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

15 products

Circuit Board Connectors

Connect flat flexible cable to circuit boards

10 products

Circuit Board Cable

Flat and flexible, connect circuit boards inside electronic devices

20 products

Push-Button Switches

Our most common switch type actuates circuits with the push of a button

14 products

Sensor Switches

Detect moving objects from a distance, triggering a circuit to open or close

2 products

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and sticking; often used as door-open indicators

23 products

DIP Switches

Slide actuators to open or close each circuit to configure instructions for electronic devices

7 products

Magnetic Switches

Actuate when a magnet comes within sensing distance; often used to detect when doors or windows open

2 products

Varistors

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

20 products

Resistors

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

491 products

Electronic Component Assortments

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

2 products

Diodes

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

93 products

Inductors

Resist changes in current to protect circuit board components from surges

15 products

Relays

Electrically open and close circuits to control power to lights, motors, and other equipment

21 products

Safety Relays

Monitor circuits and force machines to a safe stop if the relay detects a fault

23 products

USB Connectors

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

18 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

42 products

Amphenol Connectors

Attach wires to a circuit board

16 products

RJ45 Sockets

Pair with plugs to make Ethernet connections

2 products

Power Receptacles

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

15 products

D-Sub Connectors

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

18 products

ix Industrial Sockets

Pair with plugs to add ix Industrial connections to printed circuit boards

6 products

Audio Receptacles

Install in walls and panels and pair with plugs to make audio connections

7 products

Terminal Blocks

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

25 products

Circuit Board Cords

Short lengths of terminated wire make temporary connections on circuit boards

24 products

Wire Wrapping Tools

Wrap circuit board wire tightly around post terminals for a strong connection

3 products

Wrap Wire

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

11 products

Logic Level Converters

Translate signals between development boards, sensors, and other components with different voltages

1 product

Transformers

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

60 products

Rectifiers

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

30 products

Thermal Interface Pads

Soft and flexible, so they conform to rough surfaces and fill gaps between two surfaces

8 products

Potting Boxes

Fill with potting compound to protect electronic assemblies from dust, moisture, and vibration

16 products

DIN Rail Mounting Adapters

Attach to components not made for DIN rail and clip on to install

5 products

Battery Holders

Create an electrical connection between batteries and contacts to power equipment

13 products

Battery Contacts

Add or replace contacts in battery holders and circuit boards

7 products

Containers, Storage, and Furniture

Circuit Board Racks

Protect circuit boards from static electricity, which could damage them

1 product

Fabricating and Machining

Electronic-Component Positioning Stands

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

1 product

Vises

Secure workpieces in place

16 products

Spring Clamp Workholders

Secure small parts in spring clamps to keep hands free for soldering, gluing, and assembling

7 products

Toggle Clamps

Lock workpieces onto worktables or objects

15 products

Communication

Reference Books

Keep industrial information, regulations, and processes on hand

7 products

Display Screens

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

23 products

RFID Readers

Read RFID cards when prototyping systems or scan RFID tags to control circuits

1 product

Measuring and Inspecting

Load Cells

Measure forces and send them to computers to monitor and trigger actions in machinery

22 products

Decade Boxes

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

3 products

Lighting

Light Bulbs

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

31 products

Light Pipes

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

16 products

Light Transmitters

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

18 products

Fluid Handling

Pressure Transmitters

Send pressure readings to controllers and remote displays

1 product

Thermoelectric Modules

Cool down enclosures, laser and optical equipment, and other devices to their ideal temperature

6 products