Spring Switches | McMaster-Carr

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Switching Voltage

Set Time

Timing Adjustment Style

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Switching Current

Number of Circuits Controlled

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With Override

Timing Cycle

Switch Starting Position

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REACH Compliance

RoHS Compliance

Outlet Box Designation

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Color

Maximum On/Off Cycles

Number of Terminals

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Horsepower @ Switching Voltage

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78 Products

Wall-Mount Timer Switches

Use these switches in place of standard wall switches to automatically turn electrical equipment on or off after a set interval of time. They’re often used with lights.

Switches with override can bypass the automatic shut-off.

Set switches with beep and light signals to alert when the timer is almost done; the signals can also be turned off.

Switches with set time recall retain the last setting; hold the button down to restart the timer with that setting.

Knob

Without Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Set Time	For Outlet Box Type	Wire Connection Type	Choose a Knob Color		Each
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	40 sec.-5 min.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	000000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 min.-30 min.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	10 min.-60 min.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 hrs.-6 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	2 hrs.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
With Override
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 min.-30 min.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	10 min.-60 min.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 hrs.-6 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	2 hrs.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory, White	0000000	00000

White Replacement Knob	0000000	Each	00000
Ivory Replacement Knob	0000000	Each	0000

Knob and Silver Plastic Wall Plate

Knob and Wall Plate

Without Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Set Time	For Outlet Box Type	Wire Connection Type	Knob Color		Each
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 min.-5 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	000000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	4 min.-30 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	10 min.-60 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 hrs.-6 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	2 hrs.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory	0000000	00000
With Override
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 min.-5 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	4 min.-30 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	10 min.-60 min.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	1 hrs.-6 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000
1	1 Off (Normally Open)	20 A @ 125 V AC, 10 A @ 250 V AC	2 hrs.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Ivory	000000	00000

Replacement Knob

0000000

Each

00000

Push Button and White Wall Plates

Push Button

With Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Set Time	For Outlet Box Type	Wire Connection Type	Color	CSA File Number		Each
1	1 Off (Normally Open)	15 A @ 120 V AC	2 hrs., 4 hrs., 8 hrs., 12 hrs.	1 Device (1 Gang)	Wire Leads	White	__	00000000	000000
1	1 Off (Normally Open)	15 A @ 120 V AC	5 min., 10 min., 15 min., 30 min.	1 Device (1 Gang)	Wire Leads	White	003413_0_000	00000000	00000

Push Button with Countdown LCD, Set Time Recall, and Beep and Light Signals

Push-Button with
Countdown LCD
and Set Time Recall

With Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Horsepower @ Switching Voltage	Set Time	For Outlet Box Type	Wire Connection Type	Choose a Color		Each
1	1 Off (Normally Open)	41 mA @ 24 V AC, 12 mA @ 24 V DC	__	5 min.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Almond, Black, Gray, Ivory, White	000000	000000
1	1 Off (Normally Open)	6.6 A @ 120 V AC, 4.3 A @ 277 V AC	1/6 hp @ 125 V AC	5 min.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Almond, Black, Gray, Ivory, White	000000	00000

High-Current Wall-Mount Timer Switches

Control equipment with high currents such as air conditioners, heaters, and ventilating equipment. They automatically turn electrical equipment on or off after a set interval of time.

Switches with override can bypass the automatic shut-off.

With Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Horsepower @ Switching Voltage	Set Time	For Outlet Box Type	Includes	Wire Connection Type		Each
1	1 Off (Normally Open) or 1 On (Normally Closed)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	1 min.-1 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	0000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	15 min.-12 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
2	1 Off (Normally Open)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	1 min.-1 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
2	1 Off (Normally Open)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	15 min.-12 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
Without Override
1	1 Off (Normally Open) or 1 On (Normally Closed)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	1 min.-1 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	15 min.-12 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
2	1 Off (Normally Open)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	1 min.-1 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000
2	1 Off (Normally Open)	28 A @ 120 V AC/240 V AC	1 hp @ 120 V AC, 1 hp @ 240 V AC	15 min.-12 hrs.	2 Device (2 Gang)	Steel Wall Plate	Screw Terminals	0000000	000000

Replacement Knob

0000000

Each

00000

Time-Delay Wall-Mount Timer Switches

Control two devices and delay the shut off of one device by up to one hour. These switches are often used with lights and fans for ventilation. All have an override that bypasses the automatic shut-off.

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

Color	No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Horsepower @ Switching Voltage	Set Time, min.	For Outlet Box Type	Wire Connection Type		Each
Ivory	2	1 Off (Normally Open)	4.1 A @ 120 V AC	1/3 hp @ 120 V AC	1-60	1 Device (1 Gang)	Wire Leads	0000000	000000
White	2	1 Off (Normally Open)	4.1 A @ 120 V AC	1/3 hp @ 120 V AC	1-60	1 Device (1 Gang)	Wire Leads	0000000	00000

Power-Saving Panel-Mount Timer Switches

Push and release the button to activate—no electricity required.

No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Set Time	Ht.	Wd.	Dp.	Wire Connection Type	No. of Terminals	Dp. Behind Panel	For Panel Cutout Dia.	For Max. Panel Thick.		Each
1	1 Off (Normally Open) or 1 On (Normally Closed)	10 A @ 120 V AC/240 V AC	2 sec.-1 min.	1 7/16"	1"	1 1/2"	Solder Lugs	4	1 1/16"	15/32"	3/16"	0000000	0000000

Panel-Mount Timer Switches

15 Amp

20 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
1	1 Off (Normally Open) or 1 On (Normally Closed)	20 A @ 120 V AC/240 V AC	1 min.-15 min.	120V AC/240V AC	2 9/16"	1 9/16"	13/32"	1/8"	Screw Terminals	3	__	__	0000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	20 A @ 120 V AC/240 V AC	1 min.-30 min.	120V AC/240V AC	2 3/4"	1 5/8"	2 19/32"	1/4"	Screw Terminals	3	__	__	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

Replacement Knob for 20A Switches

0000000

Each

00000

High-Visibility Timer Switches

With White Face

With Black Face

The large face makes these switches easy to read from a distance. They automatically turn electrical equipment on or off after a set interval of time. All have two three-prong outlets to control up to two devices at once; plug each device directly into the switch. A rocker switch controls the outlet settings. The buzzer sounds when the timer stops.

Switches with a white face can be set so that both outlets turn off when the timer stops, or so that the top outlet turns off and the bottom outlet turns on.

Switches with a black face can be set so that both outlets turn on when the timer stops, or so that the top outlet remains off and the bottom outlet remains on.

				Outlet								Mounting
Switching Current @ Voltage	Horsepower @ Switching Voltage	Set Time	Face Dia.	No. of	Type	Switch Style	Cord Lg., ft.	Plug Type	Ht.	Wd.	Dp.	Fasteners Included	No. of Holes	Hole Dia.		Each
With White Face
5 A @ 120 V AC	1/3 hp @ 120 V AC	0.25 sec.-15 min.	6 1/2"	2	Three Prong	Rocker	6	Three Prong	7 1/2"	7 1/2"	2 1/2"	No	2	3/8"	0000000	0000000
5 A @ 120 V AC	1/3 hp @ 120 V AC	1 sec.-60 min.	6 1/2"	2	Three Prong	Rocker	6	Three Prong	7 1/2"	7 1/2"	2 1/2"	No	2	3/8"	0000000	000000
5 A @ 120 V AC	1/3 hp @ 120 V AC	1 min.-60 hrs.	6 1/2"	2	Three Prong	Rocker	6	Three Prong	7 1/2"	7 1/2"	2 1/2"	No	2	3/8"	0000000	000000
5 A @ 120 V AC	1/3 hp @ 120 V AC	15 sec.-15 hrs.	6 1/2"	2	Three Prong	Rocker	6	Three Prong	7 1/2"	7 1/2"	2 1/2"	No	2	3/8"	0000000	000000
With Black Face and Glow-in the-Dark Dial and Hands
5 A @ 120 V AC	1/3 hp @ 120 V AC	1 sec.-60 min.	6 1/2"	2	Three Prong	Rocker	6	Three Prong	7 1/2"	7 1/2"	2 1/2"	No	2	3/8"	0000000	000000

Timer Switches

Automatically turn electrical equipment off after a set interval of time. Use the three-prong outlet to plug a device directly into the switch.

Switching Current @ Voltage	Set Time, min.	No. of Outlets	Cord Lg., ft.	Ht.	Wd.	Dp.		Each
10 A @ 125 V AC	0-30	1	6	3 1/4"	2 3/4"	2 3/4"	0000000	0000000
10 A @ 125 V AC	0-60	1	6	3 1/4"	2 3/4"	2 3/4"	0000000	000000

High-Current Time and Day Activated Switches

Control equipment with high currents such as landscape lighting, pumps, and heaters. Program these switches to turn a device on and off at a set time and day. Position trippers around the clock dial to set on and off times.

24-hour switches repeat the same program daily.

Seven-day switches can perform a different program each day of the week.

Switches with a day skipper can be programmed to skip operation for one to six days.

Additional trippers (sold separately) are sold in pairs that include one “on” tripper and one “off” tripper.

Switches															Additional Trippers
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Tripper Type	No. of Trippers	Industry Designation	Ht.	Wd.	Dp.	Wire Connection Type	Environment		Each	No. of Trippers Included		Pkg.
24-Hour Timing Cycle
1	20 A @ 120 V AC, 208 V AC, 240 V AC, 277 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	15 min.	Captive	96	SPDT	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	0000000	__	000000	00
1	40 A @ 240 V AC	120V AC	12 per Day	1 hrs.	Removable	2	SPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	00000
2	40 A @ 240 V AC	120V AC	12 per Day	1 hrs.	Removable	2	DPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	0000
2	40 A @ 240 V AC	208V AC/240V AC/277V AC	12 per Day	1 hrs.	Removable	2	DPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	0000
24-Hour Timing Cycle with Day Skipper and Three Skip Screws
1	40 A @ 240 V AC	120V AC	10 per Day	1 hrs.	Removable	2	SPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	0000
2	40 A @ 240 V AC	120V AC	10 per Day	1 hrs.	Removable	2	DPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	0000
2	40 A @ 240 V AC	208V AC/240V AC/277V AC	10 per Day	1 hrs.	Removable	2	DPST	7 3/4"	5"	3"	Screw Terminals	Indoor Only	0000000	000000	1 Pair	0000000	0000
7-Day Timing Cycle
1	20 A @ 240 V AC	120V AC	12 per Day	2 hrs.	Captive	84	SPDT	7 3/4"	5"	3"	Screw Terminals	Indoor Only	00000000	000000	__	000000	00
4	40 A @ 240 V AC	120V AC	3 per Day	3.5 hrs.	Removable	4	4PST-NO	12 1/2"	8 1/4"	4"	Screw Terminals	Indoor Only	00000000	000000	7 Pairs	00000000	00000

Additional Day-Skip Screws (Pkg. of 3)

0000000

Pkg.

00000

Panel-Mount Set-to-the-Minute Time and Day Activated Switches

One Circuit

Two Circuits

Install these switches in a panel cutout. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. The seven-day timing cycle can perform a different program each day of the week. All have an override to bypass the programmed on/off settings. A backup battery maintains the program during a power outage.

Two-circuit switches can apply a different program to each circuit.

										For Panel Cutout
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Ht.	Wd.	Wire Connection Type		Each
7-Day Timing Cycle
1	15 A @ 277 V AC	12V AC/24V AC/24V DC	20 per Day	1 min.	Push Button	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Screw Terminals	00000000	0000000
1	15 A @ 277 V AC	120V AC/277V AC	20 per Day	1 min.	Push Button	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Screw Terminals	000000000	000000
2	15 A @ 250 V AC	120V AC/240V AC	20 per Day	1 min.	Push Button	SPST-NO	2.8"	2.8"	2.2"	2.68"	2.68"	Screw Terminals	00000000	000000

Surface/DIN-Rail Mount Set-to-the-Minute Time and Day Activated Switches

Seven-Day Timing Cycle

Mount these switches to a flat surface or attach to DIN rail. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. All have an override to bypass the programmed on/off settings. A backup battery maintains the program during a power outage.

Seven-day switches can perform a different program each day of the week.

7-Day Timing Cycle
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Wire Connection Type		Each
1	15 A @ 277 V AC	12V AC/24V AC/24V DC	20 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	Screw Terminals	000000000	0000000
1	15 A @ 277 V AC	120V AC/277V AC	20 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	Screw Terminals	000000000	000000
1	15 A @ 277 V AC	120V AC/277V AC	50 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	Screw Terminals	000000000	000000

Panel-Mount Time and Day Activated Switches

Install these switches in a panel cutout and program them to turn a device on and off at a set time and day. Position trippers around the clock dial to set on and off times. As UL and C-UL Recognized Components that are also CE Marked, these switches meet American, Canadian, and European safety standards.

24-hour switches repeat the same program daily.

Seven-day switches can perform a different program each day of the week. They come with an override to bypass their programmed settings.

												For Panel Cutout
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	With Override	Industry Designation	Ht.	Wd.	Dp.	Ht.	Wd.	Wire Connection Type	Specifications Met		Each
24-Hour Timing Cycle
1	21 A @ 250 V AC	120V AC	48 per Day	15 min.	Trippers	Captive	__	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Quick-Disconnect Terminals	UL Recognized Component, C-UL Recognized Component, CSA Certified, CE Marked	0000000	000000
7-Day Timing Cycle
1	21 A @ 250 V AC	120V AC	6 per Day	2 hrs.	Trippers	Captive	With Override	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Quick-Disconnect Terminals	UL Recognized Component, C-UL Recognized Component, CSA Certified, CE Marked	0000000	000000