Limit Switches | McMaster-Carr

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	Actuator Style Actuator Style

Cross Roller Plunger

Dual Simulated Roller

Dual Switch Roller Lever

	Switching Voltage Switching Voltage

	Maximum Voltage Maximum Voltage

	Switch Starting Position Switch Starting Position

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

1 Off (Normally Open)

1 On (Normally Closed)

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

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

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

	System of Measurement System of Measurement

	Switching Current Switching Current

	Wire Connection Type Wire Connection Type

Screw Terminals

Quick-Disconnect Terminals

Spade Terminals

	Environment Environment

Temporary Submersion

Hazardous Location

High-Temperature
Washdown

	Industry Designation Industry Designation

	Actuator Height Actuator Height

0.5"-4.3"

0.5"-8"

0.5"-11.8"

0.6"-5.8"

0.9"-3"

1.2"-3.3"

1.4"-5.9"

1.5"-5"

1.7"-4.2"

1.9"-3.4"

2"-2.3"

2.1"-3.9"

	Number of Terminals Number of Terminals

	Number of Circuits Controlled Number of Circuits Controlled

	Switch Type Switch Type

	Housing Material Housing Material

Stainless
Steel

	Actuation Force Actuation Force

	Switch Action Switch Action

Springs Back (Momentary)

Stays Switched (Maintained)

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

	Housing Height Housing Height

	Housing Length Housing Length

	Housing Depth Housing Depth

	Environmental Rating Environmental Rating

	Specifications Met Specifications Met

UL

CE

CSA

DIN

Mil. Spec.

ANSI

	Power Power

1/4 hp @ 125 V AC

1 hp @ 125 V AC

1/4 hp @ 250 V AC

1/2 hp @ 250 V AC

2 hp @ 250 V AC

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877 Products

Switches

Limit Switches

Washdown Limit Switches

Switches are NEMA or IP rated for protection from washdowns.

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.

Hazardous Location Limit Switches

Use these switches where ignitable gas and dust may be present. They meet UL Class I, Division 1, Groups B, C, and D; and Class II, Division 1, Groups E, F, and G for hazardous locations.

Snap-Acting Switches

Snap-Acting Switches

Open and close circuits quickly to minimize arcing and prevent contacts from sticking. These switches are often used as door-open indicators on appliances and enclosures.

Noncontact Switches

Remotely sense an object in motion to open or close a circuit.

Air-Actuated Switches

Air-Actuated Switches

Keep live electrical circuits away from work area—these switches use air pressure to turn circuits on or off.

Other Limit Switches

Relays

Open or close a circuit with an electrical impulse.

Stand-Alone Air
Directional Control Valves

Stand-Alone Air Directional Control Valves

Individual valves contain all the necessary ports to create directional control points throughout your air-powered system.

Speed-Monitoring Switches

Speed-Monitoring Switches

Set to a specific speed to detect unwanted machinery slowdown that can cause damage and downtime.

Tie Rod-Mount Proximity Switches for
Sensor-Ready Hydraulic Cylinders

Send an electronic signal to your system when the piston reaches a certain location.

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)