3/8" Switches | McMaster-Carr

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	Switching Voltage Switching Voltage

	Switching Current Switching Current

	Number of Terminals Number of Terminals

	Electrical Phase Electrical Phase

Three

Single

	Number of Circuits Controlled Number of Circuits Controlled

	Maximum Voltage Maximum Voltage

600V AC

24V DC

	Switch Function Switch Function

Off

Off or On

On or Off

	Actuator Style Actuator Style


Push Button	Toggle

	Industry Designation Industry Designation

	Number of Positions Number of Positions

	Switch Action Switch Action

Stays Switched (Maintained)

	Power Power

	Wire Connection Type Wire Connection Type


Quick- Disconnect Terminals	Screw Terminals

Wire Leads

	Actuator Color Actuator Color

	Red
	Gray

	System of Measurement System of Measurement

Inch

	For Panel Cutout Diameter For Panel Cutout Diameter	Show

3/8"

	For Panel Cutout Diameter For Panel Cutout Diameter	Hide

	Switch Type Switch Type

Disconnect

Manual

Timer

	Push-Button Style Push-Button Style

	Mushroom

	Housing Color Housing Color

	Gray
	Yellow

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

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

	Environment Environment

Damp

Dusty

Washdown

	Depth Behind Panel Depth Behind Panel

	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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90 Products

Choosing an Electrical Switch

Matching Flow Diagrams to Replace an Air Directional Control Valve

Choosing an Air Directional Control Valve

With Screw Terminals

With Wire Leads

The lever sticks out further than a push button, making it easy to identify the position of these switches. They're often used in marine environments.

Switches with a sealed body provide extra protection from moisture and dirt.

Three-position switches close one contact when pulled to the middle position, and close two contacts when pulled all the way.

For technical drawings and 3-D models, click on a part number.

										Wire Leads
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switch Position (Function)	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of	Lg.		Each
Brass Actuator with Screw Terminals
2 Positions
1	1 Off (Normally Open)	Stays Switched (Maintained)	3	SPST-NO	In (Off), Out (On)	10 A @ 12 V DC	24V DC	3/4"	2 1/8"	__	__	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	In (Off or On), Out (On or Off)	10 A @ 12 V DC	24V DC	7/8"	2 1/8"	__	__	0000000	00000
3 Positions
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	In (Off), Center (On), Out (On)	10 A @ 12 V DC	24V DC	3/4"	2 7/8"	__	__	0000000	00000
Brass Actuator with Wire Leads and Sealed Body
2 Positions
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	In (Off), Out (On)	10 A @ 12 V DC	24V DC	7/8"	2"	2	8"	0000000	00000

Panel-Mount Timer Switches

15 Amp

Install these switches in a panel cutout to automatically turn electrical equipment on or off after a set interval.

Switches with set time recall retain the last setting; push the button to start the timer over at the same interval, eliminating the need to reset the dial with every use.

											Wire Leads
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Set Time	Input Voltage	Dia.	Dp.	For Panel Cutout Dia.	For Max. Panel Thick.	Wire Connection Type	No. of Terminals	No. of	Lg.		Each
Dial Reset
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 min.-30 min.	120V AC	3 1/16"	1 13/16"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	0000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 hrs.-12 hrs.	120V AC	3 1/16"	1 13/16"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 hrs.-60 hrs.	120V AC	3 1/16"	1 13/16"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	2 hrs.-24 hrs.	120V AC	3 1/16"	1 13/16"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	5 min.-60 min.	120V AC	3 1/16"	1 13/16"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
Push Reset with Set Time Recall
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 min.-30 min.	120V AC	3 1/16"	2 1/8"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 hrs.-12 hrs.	120V AC	3 1/16"	2 1/8"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	1 hrs.-60 hrs.	120V AC	3 1/16"	2 1/8"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	2 hrs.-24 hrs.	120V AC	3 1/16"	2 1/8"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	15 A @ 125 V AC/250 V AC	5 min.-60 min.	120V AC	3 1/16"	2 1/8"	3/8"	1/8"	Quick-Disconnect Terminals/Wire Leads	2	2	8"	0000000	000000

Panel-Mount Compact Disconnect Switches

Install these switches in a panel cutout. Small enough to fit in tight spaces, they handle comparable electrical loads to standard sized switches. They cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. All have a lockout so you can secure them in the off position with a padlock (not included). They’re rated IP65 for protection from washdowns.

For technical drawings and 3-D models, click on a part number.

							Yellow Plastic Housing with Red Actuator
Switching Current @ Voltage	Industry Designation	Electrical Phase (hp)	Ht.	Wd.	Dp. Behind Panel	Specifications Met		Each
Stays Switched (Maintained)
3 Circuits with Lockout—For 3/8" Panel Cutout Dia.
12 A @ 600 V AC, 16 A @ 24 V DC	3PST	Single (1/2 hp @ 120 V AC) Three (1 hp @ 120 V AC) Three (3 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified, UL 508	00000000	000000
16 A @ 600 V AC, 20 A @ 24 V DC	3PST	Single (1 hp @ 120 V AC) Three (2 hp @ 120 V AC) Three (5 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified, UL 508	00000000	00000
20 A @ 600 V AC, 25 A @ 24 V DC	3PST	Single (1 1/2 hp @ 120 V AC) Three (3 hp @ 120 V AC) Three (5 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified, UL 508	00000000	00000
25 A @ 600 V AC, 32 A @ 24 V DC	3PST	Single (2 hp @ 120 V AC) Three (3 hp @ 120 V AC) Three (7 1/2 hp @ 240 V AC)	4"	3 1/8"	2"	UL Recognized Component, CSA Certified, UL 508	00000000	000000
50 A @ 600 V AC, 50 A @ 24 V DC	3PST	Single (3 hp @ 120 V AC) Three (15 hp @ 240 V AC) Three (7 1/2 hp @ 120 V AC)	4"	3 1/8"	3 3/16"	UL Recognized Component, CSA Certified, UL 508	00000000	000000
63 A @ 600 V AC, 80 A @ 24 V DC	3PST	Single (5 hp @ 120 V AC) Three (10 hp @ 120 V AC) Three (20 hp @ 240 V AC)	4"	3 1/8"	3 3/16"	UL Recognized Component, CSA Certified, UL 508	00000000	000000
4 Circuits with Lockout—For 3/8" Panel Cutout Dia.
12 A @ 600 V AC, 16 A @ 24 V DC	4PST	Single (1/2 hp @ 120 V AC) Three (1 hp @ 120 V AC) Three (3 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified	00000000	00000
16 A @ 600 V AC, 20 A @ 24 V DC	4PST	Single (1 hp @ 120 V AC) Three (2 hp @ 120 V AC) Three (5 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified	00000000	00000
20 A @ 600 V AC, 25 A @ 24 V DC	4PST	Single (1 1/2 hp @ 120 V AC) Three (3 hp @ 120 V AC) Three (5 hp @ 240 V AC)	3 1/4"	2 1/2"	1 13/16"	UL Recognized Component, CSA Certified	00000000	00000
25 A @ 600 V AC, 32 A @ 24 V DC	4PST	Single (2 hp @ 120 V AC) Three (3 hp @ 120 V AC) Three (7 1/2 hp @ 240 V AC)	4"	3 1/8"	2"	UL Recognized Component, CSA Certified	00000000	000000
50 A @ 600 V AC, 50 A @ 24 V DC	4PST	Single (3 hp @ 120 V AC) Three (15 hp @ 240 V AC) Three (7 1/2 hp @ 120 V AC)	4"	3 1/8"	3 3/16"	UL Recognized Component, CSA Certified	00000000	000000
63 A @ 600 V AC, 80 A @ 24 V DC	4PST	Single (5 hp @ 120 V AC) Three (10 hp @ 120 V AC) Three (20 hp @ 240 V AC)	4"	3 1/8"	3 3/16"	UL Recognized Component, CSA Certified	00000000	000000

Panel-Mount Disconnect Switches

Install these switches in a panel cutout. They cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. All are UL listed, C-UL listed, and CE marked—they meet American, Canadian, and European safety standards.

Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of 5/16” (not included).

Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.

Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.

Terminal covers prevent contact with live terminals.

For technical drawings and 3-D models, click on a part number.

Switch

Switch with Lockout

Switching
Current, A	Voltage	Industry Designation	Electrical Phase (hp)	Ht.	Wd.	Dp. Behind Panel	Environmental Rating		Each
Yellow Plastic Housing with Red Actuator
Stays Switched (Maintained)
3 Circuits—For 3/8" Panel Cutout Dia.
25	600V AC	3PST	Single (1 1/2 hp @ 240 V AC) Single (3/4 hp @ 120 V AC) Three (3 hp @ 240 V AC)	2 1/2"	2 1/2"	2"	IP40	00000000	000000
32	600V AC	3PST	Single (1 hp @ 120 V AC) Single (2 hp @ 240 V AC) Three (5 hp @ 240 V AC)	2 1/2"	2 1/2"	2"	IP40	00000000	00000
50	600V AC	3PST	Single (1 1/2 hp @ 120 V AC) Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	2 13/16"	2 13/16"	2 3/8"	IP40	00000000	00000
63	600V AC	3PST	Single (3 hp @ 120 V AC) Single (5 hp @ 240 V AC) Three (10 hp @ 240 V AC)	2 13/16"	2 13/16"	2 3/8"	IP40	00000000	00000
80	600V AC	3PST	Single (10 hp @ 240 V AC) Single (3 hp @ 120 V AC) Three (20 hp @ 240 V AC)	3 3/4"	3 3/4"	2 11/16"	IP40	00000000	000000
100	600V AC	3PST	Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC)	3 3/4"	3 3/4"	2 11/16"	IP40	00000000	000000
3 Circuits with Lockout—For 3/8" Panel Cutout Dia.
25	600V AC	3PST	Single (1 1/2 hp @ 240 V AC) Single (3/4 hp @ 120 V AC) Three (3 hp @ 240 V AC)	2 5/8"	2 5/8"	2"	IP40	00000000	00000
32	600V AC	3PST	Single (1 hp @ 120 V AC) Single (2 hp @ 240 V AC) Three (5 hp @ 240 V AC)	2 5/8"	2 5/8"	2"	IP40	00000000	00000
50	600V AC	3PST	Single (1 1/2 hp @ 120 V AC) Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	2 5/8"	2 5/8"	2 3/8"	IP40	00000000	00000
63	600V AC	3PST	Single (3 hp @ 120 V AC) Single (5 hp @ 240 V AC) Three (10 hp @ 240 V AC)	2 5/8"	2 5/8"	2 3/8"	IP40	00000000	00000
80	600V AC	3PST	Single (10 hp @ 240 V AC) Single (3 hp @ 120 V AC) Three (20 hp @ 240 V AC)	3 3/8"	3 3/8"	2 11/16"	IP40	00000000	000000
100	600V AC	3PST	Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC)	3 3/8"	3 3/8"	2 11/16"	IP40	00000000	000000
Gray Plastic Housing with Gray Actuator
Stays Switched (Maintained)
3 Circuits—For 3/8" Panel Cutout Dia.
25	600V AC	3PST	Single (1 1/2 hp @ 240 V AC) Single (3/4 hp @ 120 V AC) Three (3 hp @ 240 V AC)	2 1/2"	2 1/2"	2"	IP40	00000000	00000
32	600V AC	3PST	Single (1 hp @ 120 V AC) Single (2 hp @ 240 V AC) Three (5 hp @ 240 V AC)	2 1/2"	2 1/2"	2"	IP40	00000000	00000
50	600V AC	3PST	Single (1 1/2 hp @ 120 V AC) Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	2 13/16"	2 13/16"	2 3/8"	IP40	00000000	00000
63	600V AC	3PST	Single (3 hp @ 120 V AC) Single (5 hp @ 240 V AC) Three (10 hp @ 240 V AC)	2 13/16"	2 13/16"	2 3/8"	IP40	00000000	00000
80	600V AC	3PST	Single (10 hp @ 240 V AC) Single (3 hp @ 120 V AC) Three (20 hp @ 240 V AC)	3 3/4"	3 3/4"	2 11/16"	IP40	00000000	000000
100	600V AC	3PST	Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC)	3 3/4"	3 3/4"	2 11/16"	IP40	00000000	000000
3 Circuits with Lockout—For 3/8" Panel Cutout Dia.
25	600V AC	3PST	Single (1 1/2 hp @ 240 V AC) Single (3/4 hp @ 120 V AC) Three (3 hp @ 240 V AC)	2 5/8"	2 5/8"	2"	IP40	00000000	00000
32	600V AC	3PST	Single (1 hp @ 120 V AC) Single (2 hp @ 240 V AC) Three (5 hp @ 240 V AC)	2 5/8"	2 5/8"	2"	IP40	00000000	00000
50	600V AC	3PST	Single (1 1/2 hp @ 120 V AC) Single (3 hp @ 240 V AC) Three (7 1/2 hp @ 240 V AC)	2 5/8"	2 5/8"	2 3/8"	IP40	00000000	00000
63	600V AC	3PST	Single (3 hp @ 120 V AC) Single (5 hp @ 240 V AC) Three (10 hp @ 240 V AC)	2 5/8"	2 5/8"	2 3/8"	IP40	00000000	00000
80	600V AC	3PST	Single (10 hp @ 240 V AC) Single (3 hp @ 120 V AC) Three (20 hp @ 240 V AC)	3 3/8"	3 3/8"	2 11/16"	IP40	00000000	000000
100	600V AC	3PST	Single (10 hp @ 240 V AC) Single (5 hp @ 120 V AC) Three (25 hp @ 240 V AC)	3 3/8"	3 3/8"	2 11/16"	IP40	00000000	000000

"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd.

0000000

Each

00000

Replacement Actuator for 3 Circuit Switches with Lockout

				Yellow Plastic Housing with Red Actuator		Gray Plastic Housing with Gray Actuator
For Switching Current	Ht.	Wd.	Dp.		Each		Each
25A, 32A, 50A, 63A	2 9/16"	2 9/16"	1 5/16"	0000000	000000	0000000	000000
80A, 100A	3 3/8"	3 3/8"	1 5/16"	0000000	00000	0000000	00000

Auxiliary Contact Blocks

Switching Current, A		Each
10	0000000	000000

Additional Power Poles

Switching Current, A	Specifications Met		Each
25	UL Listed, CE Marked	00000000	000000
32	UL Listed, CE Marked	00000000	00000
50	UL Listed, CE Marked	00000000	00000
63	UL Listed, CE Marked	00000000	00000
80	UL Listed, CE Marked	00000000	00000
100	UL Listed, CE Marked	00000000	00000

Neutral Poles

Switching Current, A	Specifications Met		Each
25	UL Listed, CE Marked	00000000	000000
32	UL Listed, CE Marked	00000000	00000
50	UL Listed, CE Marked	00000000	00000
63	UL Listed, CE Marked	00000000	00000
80	UL Listed, CE Marked	00000000	00000
100	UL Listed, CE Marked	00000000	00000

Additional Junction Blocks

For Current, A	Specifications Met		Each
25/32	UL Listed, CE Marked	00000000	000000
50/63	UL Listed, CE Marked	00000000	00000
80/100	UL Listed, CE Marked	00000000	00000

Terminal Covers

For Use With		Each
50/63A Power Pole, Neutral Pole, or Junction Block	0000000	00000
25/32A Power Pole, Neutral Pole, or Junction Block	0000000	0000
25/32A Switch Contact Block	0000000	0000
50/63A Switch Contact Block	0000000	0000
80/100A Switch Contact Block	0000000	0000
Auxiliary Contact Block	0000000	0000

Single-Action Air Directional Control Valves

Manually control these valves by pushing or turning the actuator. Also known as 3-way or 3/2 valves, they create one action, such as extending a cylinder. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. In the off position, they exhaust air pressure from the system, allowing equipment to reset so the action can be repeated.

Normally closed valves block airflow until actuated.

Valves with hand return actuation stay actuated and go back to their starting position only when you move the actuator again.

Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve. When selecting between valves with the same port size, choose the valve with the higher flow coefficient to ensure it provides enough airflow to operate your system.

For technical drawings and 3-D models, click on a part number.

Barbed Male Inlet × Barbed Male Outlet

									Overall
	No. of Flow Ports	For Inlet Tube ID	For Outlet Tube ID	Exhaust Connection Type	Max. Flow Rate, scfm @ 100 psi	Flow Coefficient (Cv)	Pressure Range, psi	Vacuum Rating, in. of Hg	Lg.	Wd.	Ht.	For Panel Cutout Dia.	Mounting Fasteners Included		Each
Normally Closed Flow Positions
Hand Return Actuation
G	3	1/16"	1/16"	Barbed	2.2	0.04	0-125	20	5/8"	3/8"	1 5/8"	3/8"	Yes	00000000	000000

Heavy Duty Flexible Shafts

Male × Female

With a strong steel core, a protective plastic case, and bearings, these shafts handle the demands of high-torque applications. They snake around curves and obstructions to transmit rotary motion along any path. Rotate manually with a knob (not included) or mechanically.

Secure female fittings by tightening the set screw.

Male fittings attach to a panel. Push the male end of the shaft through a panel cutout and secure with locknuts. Fittings have a D-profile for fastening to a manual control knob.

					Max. Torque, in.-lbs.
O'all Lg., ft.	For Shaft Dia.	OD	For Panel Cutout Dia.	Max. Speed, rpm	Clockwise Drive	Counterclockwise Drive	Bend Radius	Material	Fitting Material	Bearing Material	Max. Temp., °F		Each
Male × Female
With Sleeve Bearings
3	1/4"	25/64"	3/8"	200	65	45	5"	Plastic-Coated Steel	Zinc-Plated Steel	Bronze	190°	0000000	0000000
4	1/4"	25/64"	3/8"	200	65	45	5"	Plastic-Coated Steel	Zinc-Plated Steel	Bronze	190°	0000000	000000
6	1/4"	25/64"	3/8"	200	65	45	5"	Plastic-Coated Steel	Zinc-Plated Steel	Bronze	190°	0000000	000000

Flexible Shafts

Male × Female

Made of steel, these shafts are stronger than stainless steel flexible shafts. They snake around curves and obstructions to transmit rotary motion along any path. Rotate manually with a knob (not included) or mechanically.

Secure female fittings by tightening the set screw.

Male fittings attach to a panel. Push the male end of the shaft through a panel cutout and secure with locknuts. Fittings have a D-profile for fastening to a manual control knob.

					Max. Torque, in.-lbs.
Overall Lg., ft.	For Shaft Dia.	OD	For Panel Cutout Dia.	Max. Speed, rpm	Clockwise Drive	Counterclockwise Drive	Bend Radius	Material	Fitting Material		Each
Male × Female
1/2	1/4"	1/8"	3/8"	200	20	14	3"	Steel	Zinc-Plated Steel	0000000	000000
1	1/4"	1/8"	3/8"	200	20	14	3"	Steel	Zinc-Plated Steel	0000000	00000
1	1/4"	3/16"	3/8"	200	65	45	5"	Steel	Zinc-Plated Steel	0000000	00000
1 1/2	1/4"	1/8"	3/8"	200	20	14	3"	Steel	Zinc-Plated Steel	0000000	00000
1 1/2	1/4"	3/16"	3/8"	200	65	45	5"	Steel	Zinc-Plated Steel	0000000	000000
2	1/4"	1/8"	3/8"	200	20	14	3"	Steel	Zinc-Plated Steel	0000000	00000
2	1/4"	3/16"	3/8"	200	65	45	5"	Steel	Zinc-Plated Steel	0000000	000000
3	1/4"	1/8"	3/8"	200	20	14	3"	Steel	Zinc-Plated Steel	0000000	00000
3	1/4"	3/16"	3/8"	200	65	45	5"	Steel	Zinc-Plated Steel	0000000	000000

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Choosing an Electrical Switch

Matching Flow Diagrams to Replace an Air Directional Control Valve

Choosing an Air Directional Control Valve

Push-Pull Switches

Panel-Mount Timer Switches

Panel-Mount Compact Disconnect Switches

Panel-Mount Disconnect Switches

Single-Action Air Directional Control Valves

Heavy Duty Flexible Shafts

Flexible Shafts