Electronics Components | McMaster-Carr

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Arduino Nano IoT Bundle

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STM32 Dual-Core Cortex-M7/M4

STM32H747 Dual-Core Cortex M7/M4

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1,727 Products

Electrical

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

Circuit Boards

Create your own circuit board designs by adding components

72 products

Logic Level Converters

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

1 product

PLCs

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

9 products

Transistors

Boost weak electrical signals and rapidly control data transmission

20 products

Relays

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

44 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

213 products

Manual Switches

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

21 products

Computers

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

12 products

Magnetic Switches

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

2 products

Circuit Board Headers

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

20 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

52 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

77 products

Electrical Cords

Connect equipment and devices to a power supply

1 product

Electrical Wire

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

32 products

Development Board Cords

Connect your development board to components such as sensors and actuators

7 products

Wire Wrapping Tools

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

3 products

Terminal Blocks

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

25 products

Electrical Cable

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

20 products

Electrical Connector Contacts

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

6 products

Circuit Board Terminals

Connect wire to circuit boards

9 products

Resistors

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

491 products

Diodes

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

93 products

Circuit Board Voltage Regulators

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

15 products

Thermal Interface Material

Dissipate heat away from electronic components

8 products

Varistors

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

20 products

Electronic Component Kits

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

2 products

Circuit Board Capacitors

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

59 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

Transformers

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

60 products

Inductors

Resist changes in current to protect circuit board components from surges

15 products

Rectifiers

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

30 products

DIN Rail Mounting Adapters

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

4 products

Communication

Display Screens

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

23 products

Reference Books

Keep industrial information, regulations, and processes on hand

7 products

Computer Monitors

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

9 products

RFID Readers

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

1 product

Fabricating and Machining

Electronic-Component Positioning Stands

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

1 product

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

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

30 products

Measuring and Inspecting

Inertial Measurement Units

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

1 product

Decade Boxes

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

3 products

Load Cells

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

22 products

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