Contact Blocks | McMaster-Carr

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) and 1
On (Normally Closed)

1 On (Normally Closed)

2 Off (Normally Open)

2 On (Normally Closed)

2 Off (Normally Open) and 2
On (Normally Closed)

1 Off (Normally Open) or 1 On
(Normally Closed)

3 Off (Normally Open)

	Switching Voltage Switching Voltage

	Component Component

Contact Block

Contact Block with Mounting
Latch

Illuminated Push-Button
Actuator

Thermal Overload Element

	Wire Connection Type Wire Connection Type


Screw Terminals	Quick- Disconnect Terminals

Screw-Clamp Terminals	Wire Leads

	Number of Terminals Number of Terminals

	Switching Current Switching Current

	Number of Circuits Controlled Number of Circuits Controlled

	Industry Designation Industry Designation

	Maximum Voltage Maximum Voltage

	Illumination Illumination

Not Illuminated

Illuminated

	Actuator Style Actuator Style


Push Button	Lever

Key	Plunger

	Switch Action Switch Action

Springs Back (Momentary)

Stays Switched (Maintained)

	Actuator Color Actuator Color

	Red		Green
	Black		Yellow
	White		Gray
	Blue		Orange

	For Panel Cutout Diameter For Panel Cutout Diameter

	Switch Type Switch Type

Manual

Motor Control

Disconnect

	Specifications Met Specifications Met

	For Actuator Type For Actuator Type

Push Button

Key

Lever

Illuminated Push-Button

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Push-Button Style Push-Button Style


Flush	Mushroom

Projecting

	Mounting Location Mounting Location

Panel

DIN Rail

Enclosure Door

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Environment Environment

High-
Pressure
Washdown

Submersible

Hazardous

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

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612 Products

Choosing an Electrical Switch

22 mm Panel-Mount Build-Your-Own Metal Switches

Choose an actuator and contact block to make your own 22 mm metal switch.

30 mm Panel-Mount Build-Your-Own Metal Switches

Choose an actuator and contact block to make your own 30 mm switch.

22 mm Panel-Mount Build-Your-Own Plastic Switches

Choose an actuator and contact block to make your own 22 mm plastic switch.

16 mm Panel-Mount Build-Your-Own Plastic Switches

Choose an actuator and contact block to make your own 16 mm switch.

Joystick Switches

Grab these switches by hand and pivot them to use.

30 mm Emergency Stop
Panel-Mount Push-Button Switches

Immediately cut power with a single push.

Metal Premium 30 mm
Panel-Mount Push-Button Switches

More durable than standard metal switches, these can handle tough, repetitive use.

Flush-Mount 30 mm Panel-Mount Push-Button Switches

The face of these switches mounts flush against a panel, so they're easy to clean and hard to damage.

30 mm Multifunction Panel-Mount Push-Button Switches

Save space on a panel by using one switch to perform multiple switching functions.

Space Saver 22 mm Panel-Mount Push-Button Switches

The built-in contact block in these switches extends behind the panel half the depth of most other 22 mm switches, saving valuable space.

Plastic Enclosed Push-Button Switches

Rated NEMA 4X and 13, all switches resist corrosion and can withstand washdowns and oil/coolant spraying.

Aluminum Enclosed Push-Button Switches

More lightweight than steel or stainless steel, these aluminum enclosed switches are rated NEMA 4X for protection from corrosion and washdowns.

Aluminum Emergency Stop
Enclosed Push-Button Switches

These aluminum switches are rated NEMA 4, NEMA 13, and IP66 for protection from washdowns and oil/coolant spraying.

Plastic 22 mm Panel-Mount Lever Switches

These switches are protected from corrosion, high-temperature and high-pressure washdowns, and oil/coolant spraying. Install them in 22 mm dia. cutouts.

Corrosion-Resistant Washdown Pendant Switches

Control cranes and other mobile machinery in dirty, outdoor, and wet environments without damaging your switch.

Enclosure Door Switches

Activate or deactivate fans, lights, and other devices inside your enclosure when you open or close the door.

Impact-Resistant Pendant Switches

A durable rubber housing covers the buttons and protects these switches from impact.

Motor Starters

Provide on/off control for a motor and protect it from overloads. These starters shut the motor off if current exceeds the full-load current rating.

Low-Profile Motor Starters

With a shallower depth than most other starters, these fit in narrow spaces.

Compact Enclosed Motor Starters

Sized to fit in tight spaces, these starters have a shorter height and narrower depth than most other starters.

Enclosed Motor Starters

The NEMA 4X rated enclosure protects these starters from corrosion and washdowns.

Manual Motor Starters

Operated by hand, these starters are more compact than electrically actuated motor starters; use them when multiple motor circuits are housed in one panel.

Build-Your-Own Manual Motor Starters

Assemble your own motor starter by combining a switch and a thermal overload element.

Enclosure Disconnect Switches

Mount these switches inside your enclosure to prevent it from opening when power is on—actuating the switch disconnects power and releases the door.