Spring-Wound Timers | McMaster-Carr

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With Override

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Exempt

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35 Products

About Timing Functions

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.

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

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

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

Analog Timers

Count down to measure time with a twist of the dial.

									Case
	Timing Functions	Max. No. of Events	Max. Timer Duration, min.	Resolution	Max. Alarm Duration	Ht.	Wd.	Dp.	Material	Color	Features		Each
A	Count Down	1	60	1 min.	1 sec.	3 3/4"	3 3/4"	2"	Plastic	White	Alarm	0000000	000000
B	Count Down	1	30	1 min.	1 sec.	3 1/2"	3"	2 1/2"	Plastic	Black	Alarm	000000	00000
B	Count Down	1	60	1 min.	1 sec.	3 1/2"	3"	2 1/2"	Plastic	Black	Alarm	000000	00000