NEMA 4 Switches | McMaster-Carr

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	Actuator Style Actuator Style


Push Button	Toggle

Lever	Plunger

Roller Lever	Key

Roller Plunger	Foot Pedal

Cable Pull	Wobble Stick

Rod	Cross Roller Plunger

	Switching Voltage Switching Voltage

	Switch Action Switch Action

Stays Switched (Maintained)

Springs Back (Momentary)

	Environment Environment

	System of Measurement System of Measurement

Inch

	For Panel Cutout Diameter For Panel Cutout Diameter

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

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

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

1 On (Normally Closed)

2 Off (Normally Open)

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

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

2 On (Normally Closed)

3 Off (Normally Open)

4 Off (Normally Open) or 4
On (Normally Closed)

	Illumination Illumination

Not Illuminated

Illuminated

	Actuator Color Actuator Color

	Black		Red
	Green		White
	Gray		Yellow
	Blue		Orange
	Amber

	Number of Terminals Number of Terminals

	Push-Button Style Push-Button Style


Flush	Projecting

Mushroom

	Wire Connection Type Wire Connection Type

Quick-Disconnect Terminals

	Number of Positions Number of Positions

	Number of Circuits Controlled Number of Circuits Controlled

	Switching Current Switching Current

	Maximum Voltage Maximum Voltage

	Environmental Rating Environmental Rating	Show

NEMA 4

	Environmental Rating Environmental Rating	Hide

Warning: Products have one, but not necessarily all, of the selected characteristics.

Associated Apparatus for
IEC Zone 0 Groups IIC,
IIB, IIA

Associated Apparatus for
IEC Zone 20 Groups IIIC,
IIIB, IIIA

IEC Zone 0 Groups IIC,
IIB, IIA

IEC Zone 1 Groups IIC,
IIB, IIA

IEC Zone 2 Groups IIC,
IIB, IIA

IEC Zone 20 Groups
IIIC, IIIB, IIIA

IEC Zone 21 Groups
IIIC, IIIB, IIIA

NEC Class I Division 1
Groups A, B, C, D

NEC Class I Division 1
Groups B, C, D

NEC Class I Division 2
Group D

NEC Class I Division 2
Groups A, B, C, D

NEC Class I Division 2
Groups B, C, D

NEC Class I Divisions
1, 2 Group D

NEC Class I Divisions
1, 2 Groups A, B, C, D

NEC Class I Divisions
1, 2 Groups B, C, D

NEC Class I Divisions
1, 2 Groups C, D

NEC Class II Division 1
Groups E, F ,G

NEC Class II Division 2
Groups F, G

NEC Class II Divisions
1, 2 Groups E, F, G

NEC Class II Divisions
1, 2 Groups F, G

NEC Class III
Divisions 1, 2

NEC Zone 1 Group IIA

NEC Zone 1 Groups
IIB, IIA

NEC Zone 1 Groups
IIC, IIB, IIA

NEC Zone 2 Groups
IIB, IIA

	Actuator Base Material Actuator Base Material

Metal

Plastic

	Industry Designation Industry Designation

	Mounting Location Mounting Location

	Switch Type Switch Type

	Position Designation Position Designation

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

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515 Products

Choosing an Electrical Switch

Wet-Location Toggle Switches

A rubber seal protects these switches from splashing water.

Pull-to-Unlock Toggle Switches

Prevent accidental actuation—these toggle switches must be pulled up before they can switch a circuit.

Metal 22 mm Panel-Mount Push-Button Switches

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.

Metal 22 mm Emergency Stop
Panel-Mount Push-Button Switches

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 Emergency Stop
Panel-Mount Push-Button Switches

Immediately cut power with a single push.

16 mm Emergency Stop
Panel-Mount Push-Button Switches

Immediately cut power with a single push.

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.

Metal 22 mm Panel-Mount Lever Switches

Switches are rated NEMA 4, 13, and IP66.

Metal 30 mm Panel-Mount Lever Switches

Rated NEMA 4, 13, and IP66, these metal switches are protected from washdowns and oil/coolant spraying. Install them in 30 mm dia. cutouts.

16 mm Panel-Mount Lever Switches

Install in 16 mm dia. cutouts.

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 Metal Switches

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

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

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

Easy-Grip Pendant Switches

With a slim shape, these switches fit comfortably in your hand.

Wireless Pendant Switches

Operate equipment from up to 330 feet away—these switches include a transmitter and a receiver that connects to equipment.

Overhead Rope-Pull Switches

Pull the hanging rope in any direction to actuate these switches.

Cable-Pull Emergency Stop Switches

Immediately cut power by pulling the cable.

Washdown 3/4" Panel-Mount Key Switches

Rated NEMA 4, these switches are protected from washdowns.

16 mm Panel-Mount Key Switches

These 16 mm switches require a key to turn circuits on or off, limiting access to sensitive equipment.

Wet-Location Foot Switches

Safe for use in wet locations, these switches are IP and NEMA rated for protection from corrosion, washdowns, and oil/coolant spraying.

Variable-Speed Foot Switches

When the pedal is pressed, the built-in potentiometer adjusts the resistance to vary the speed for motor drives.

Limit Switches

Enclosed Washdown Snap-Acting Switches

Rated NEMA 4 , these enclosed switches have a sealed actuator for protection from washdowns.

Low-Profile Wet-Location Limit Switches

Stack these slim switches together, or fit them into tight spaces. They're rated IP67 for protection from temporary submersion.

Sealed Wet-Location Limit Switches

Sealed actuators prevent these switches from jamming, even when exposed to sand, mud, or dirt. They're rated IP67 for protection from temporary submersion.

Compact Safety Limit Switches

Shorter and thinner than other safety limit switches, these are sized to fit tight spaces.

Safety Limit Switches

Protect machinery and ensure the safety of personnel—these switches will open the circuit when actuated even if a spring fails or the contacts stick.

Frame-Mounted Safety Switches

Often used with machine guards, these switches mount to a door frame.

Tilt Switches

Often used as position indicators, pump level controls, and machine limit switches, these switches actuate when tilted to a certain angle.

Motor Control Switches

Washdown Reversing Motor Switches

Rated NEMA 4, these switches are protected from washdowns.

Build-Your-Own Manual Motor Starters

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

Washdown Programmable
Three-Phase AC Motor Speed Controls

Rated NEMA 4, these controls are protected from washdowns.

Multi-Speed Line-Voltage Thermostats

Control one- and two-speed heaters and air conditioners.

Pressure and Vacuum Switches

Pressure Switches

The traditional pressure switch. These power equipment, activate controls or alarms, or kick-off other actions when they reach a set pressure.

Fixed Setpoint Pressure Switches

Prevent changes to the set pressure that activates equipment—these switches come ready to use at your preferred setpoint.

Compact Pressure Switches

With a round body that’s at least one-third thinner than traditional pressure switches, these fit in tight, cramped spaces.

Hazardous Location Pressure Switches

Built with an explosionproof enclosure to meet NEMA 7 and 9 standards for hazardous locations, these switches were tested and verified by UL and CSA for use where explosive liquids, dust, and gas are present.

Pressure Switches for Oxygen

Cleaned to ASTM G93 requirements and then bagged, these switches meet the strict cleaning standards required for oxygen service lines.

Differential Pressure Switches

These switches operate based on the difference in pressure between two process lines. When the differential pressure exceeds your setpoint, the switch is activated.

Washdown Differential Pressure Switches

These switches are rated NEMA 4 for protection from dirt and washdowns.

Compact Vacuum Switches

Often built into pumps and hydraulic systems with limited space, these compact switches power equipment, activate controls, and signal alarms when they reach a set vacuum.

Fixed Setpoint Vacuum Switches

Prevent changes to the set vacuum that powers equipment, activates controls, or signals alarms. The setpoint on these switches isn't adjustable.

Flow and Level Monitoring and Control

Vertical-Mount Hazardous Location
Float Switches for Fuels and Oils

For use in locations with flammable gases and combustible dust, this switch is UL listed and CSA certified for Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G.

Horizontal-Mount Hazardous Location
Float Switches for Fuels and Oils

These switches are CSA certified for hazardous locations.

Hazardous Location Float Switches for Water

Hazardous Location Float Switches for Chemicals

Designed for use in areas where flammable substances are present, these switches are CSA certified for hazardous locations.

Hazardous Location Flow Switches
for Water, Air, and Inert Gas

These switches have a fixed set point for applications with consistent flow.

Adjustable Hazardous Location Flow
Switches for Water, Air, and Inert Gas

Alter the set point with the adjustment screw to suit your application.

Hazardous Location Insertion Flow
Switches for Water, Oil, Air, and Inert Gas

For installation in environments with flammable gases and combustible dust, these flow switches are UL listed for use in hazardous locations.

Console Enclosures

Build out human-machine interfaces by installing buttons, switches, gauges, and other components to monitor and control machinery.

Hazardous Location Vibration-Monitoring Switches

Get NEMA 4 and IP66 protection from dirt and water. If vibration or shock exceeds a set activation point, the contacts actuate to either shut down your machine or activate an alarm.

Solenoid-Operated Directional-Control Block-Mount Hydraulic Valves

Solenoid-Operated Directional-Control
Block-Mount Hydraulic Valves

Direct flow with an electronic signal.