24-Hour Timers | McMaster-Carr

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38 Products

About Timing Functions

24-Hour Timing Cycle

Program these switches to turn a device on and off at a set time and day. They have a three-prong outlet to plug devices directly into the switch. Use with lamps and other small electrical loads. All have an override to bypass the programmed on/off settings.

24-hour switches repeat the same program daily.

Switches with trippers are programmed by setting on and off times by positioning trippers around the clock dial.

24-Hour Timing Cycle
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	No. of Trippers	Switching Current @ Voltage	No. of Outlets	Ht.	Wd.	Dp.	Plug Type		Each
3 per Day	30 min.	Trippers	Removable	6	15 A @ 120 V AC	1	3 1/4"	3 1/4"	3 1/4"	Three Prong	0000000	000000

Outdoor Time and Day Activated Switches

24-Hour Timing Cycle

Designed to work with landscape lighting and filter pumps, these switches turn equipment on and off at a set time and day. They control two devices at once, and have three-prong outlets to plug devices directly into the switch. All have an override to bypass the programmed on/off settings.

24-hour switches repeat the same program daily. Position trippers around the clock dial to set on and off times.

Switches with light sensor control allow one device to be controlled by the presence or absence of light.

NEMA 3R rated switches are protected against falling liquids and light splashing.

													Mounting
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	No. of Trippers	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Plug Type	Cord Lg., ft.	Fasteners Included	No. of Holes	Hole Dia.		Each
24-Hour Timing Cycle—NEMA 3R
12 per Day	30 min.	Trippers	Removable	4	15 A @ 120 V AC	2	Light Sensor Control	9 3/8"	5 1/2"	3 3/8"	Three Prong	2	No	4	1/4"	0000000	0000000

Additional Trippers (Pkg. of 2 Pairs)

0000000

Pkg.

00000

Surface/DIN-Rail Mount Time and Day Activated Switches

Mount these switches to a flat surface or attach to DIN rail. 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. These switches have a 24-hour timing cycle that repeats the same program daily. As UL and C-UL Recognized Components that are also CSA Certified and CE Marked, they meet American, Canadian, and European safety standards.

											Mounting
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	No. of Holes	Hole Dia.	For DIN Rail Ht., mm	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	4.2"	2.8"	2.2"	No	3	0.13"	35	Screw Terminals	UL Recognized Component, C-UL Recognized Component, CSA Certified, CE Marked	0000000	000000

Outlet-Box-Mount Time and Day Activated Switches

24-Hour Timing Cycle

Switches fit single device (1 gang) outlet boxes. Program them to turn a device on and off at a set time and day. They’re often used with lamps and other small electrical loads.

24-hour switches repeat the same program daily. Position trippers around the clock dial to set on and off times.

24-Hour Timing Cycle
No. of Circuits Controlled	Switching Current @ Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	Features	Industry Designation	For Outlet Box Type	Wire Connection Type	Wire Lead Lg.		Each
1	20 A @ 120 V AC	24 per Day	30 min.	Trippers	Captive	On/Off/Timer Selector	SPST	1 Device (1 Gang)	Wire Leads	6"	000000	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.

											For Panel Cutout
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	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

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.

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	00000	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	00000	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	00000	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	00000	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

Additional Day-Skip Screws (Pkg. of 3)

0000000

Pkg.

00000

Outdoor High-Current Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing. They control equipment with high currents, such as landscape lighting, pumps, and heaters. 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.

24-hour switches repeat the same program daily.

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	Housing Material	Industry Designation	Ht.	Wd.	Dp.	Wire Connection Type		Each	No. of Trippers Included		Pkg.
24-Hour Timing Cycle
1	40 A @ 240 V AC	120V AC	12 per Day	1 hrs.	Removable	2	Steel	SPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminals	0000000	0000000	1 Pair	0000000	00000
2	40 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	15 min.	Captive	96	Polycarbonate Plastic	DPDT	8 7/8"	6 5/8"	3"	Screw Terminals	0000000	00000	__	000000	00
2	40 A @ 240 V AC	120V AC	12 per Day	1 hrs.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminals	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	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminals	0000000	000000	1 Pair	0000000	0000
24-Hour Timing Cycle with Day Skipper and Three Skip Screws
2	40 A @ 240 V AC	120V AC	10 per Day	1 hrs.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminals	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	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminals	0000000	000000	1 Pair	0000000	0000

Additional Day-Skip Screws (Pkg. of 3)

0000000

Pkg.

00000

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

24-Hour 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.

24-hour switches repeat the same program daily. They control two circuits and can apply a different program to each circuit.

										Mounting			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.	Fasteners Included	No. of Holes	For DIN Rail Ht., mm	Ht.	Wd.	Wire Connection Type		Each
24-Hour Timing Cycle
2	15 A @ 250 V AC	120V AC/240V AC	12 per Day	1 min.	Push Button	SPST-NO	3.8"	3.8"	2.2"	No	2	35	3.62"	3.62"	Screw Terminals	00000000	0000000

Set-to-the-Minute High-Current Time and Day Activated Switches

For precise control of high-current equipment such as landscape lighting, pumps, and heaters, these switches schedule on/off times to the exact minute. A backup battery or capacitor maintains the program during a power outage.

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

										Mounting
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Knockout Trade Size	Wire Connection Type	Environment	Specifications Met		Each
24-Hour Timing Cycle
With Capacitor Backup, Lockout
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	1 min.	Push Button	SPST	7 7/8"	5 1/8"	3 7/16"	No	3/16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	0000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	1 min.	Push Button	SPST, DPST	7 7/8"	5 1/8"	3 7/16"	No	3/16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	000000

Outdoor Set-to-the-Minute High-Current Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. They control equipment with high currents, such as landscape lighting, pumps, and heaters. A backup battery maintains the program during a power outage.

24-hour switches repeat the same program daily.

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

											Mounting
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Housing Material	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Wire Connection Type		Each
24-Hour Timing Cycle
With Battery Backup, Lockout
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	SPST	8 3/8"	5"	3 1/8"	No	0.26"	Screw Terminals	0000000	0000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	DPST	8 3/8"	5"	3 1/8"	No	0.26"	Screw Terminals	0000000	000000

Digital Timers

Timers with a calibration certificate traceable to NIST have been tested to NIST standards to ensure accuracy.

Timers with a memory function automatically return the display to the last programmed time. Good for timing repetitive intervals.

IP65-rated timers protect against dust and low-pressure washdowns. They also resist impacts up to 4 ft.

										Case
Style	Timing Functions	Max. No. of Events	Max. Timer Duration	Max. Alarm Duration	Resolution	Ht.	Wd.	Dia.	Dp.	Material	Color	Backing Type	Batteries Included	Features	Environmental Rating		Each
Timers
C	Count Up Count Down Pause Clock	1	24 hrs.	Continuous	1 sec.	1 3/4"	__	3 1/8"	__	Plastic	White	__	Yes	Alarm Memory Function	__	00000000	000000
D	Count Up Count Down Pause	1	24 hrs.	12 sec.	1 sec.	2 1/2"	3 3/4"	__	1"	Plastic	Gray	Magnetic	Yes	Alarm Built-In Stand Memory Function	__	0000000	00000
F	Count Up Count Down Pause Clock	1	24 hrs.	1 min.	1/100 sec.	3 3/4"	3 3/4"	__	3"	Plastic	Gray	__	Yes	Alarm Built-In Stand Memory Function	__	000000	00000
K	Count Up Count Down	2	24 hrs.	1 min.	1 sec.	3 3/4"	5"	__	1/2"	Plastic	White	__	Yes	Alarm Memory Function	__	00000000	00000
M	Count Up Count Down	1	24 hrs.	5 min.	1 sec.	5 1/4"	7 3/4"	__	1"	Plastic	Black	__	Yes	Alarm Built-In Stand Memory Function	IP65	00000000	00000
P	Count Up	4	24 hrs.	Continuous	1 min.	5 1/2"	8 7/8"	__	1"	Plastic	White	Magnetic	Yes	Alarm Built-In Stand Clip Dry Eraseable	__	00000000	00000
Timers with Calibration Certificate Traceable to NIST
R	Count Up Count Down Pause Clock	2	24 hrs.	1 min.	1 sec.	2 1/8"	2 3/4"	__	7/8"	Plastic	Black	Magnetic	Yes	Alarm Built-In Stand Memory Function	__	0000000	00000
Y	Count Up Count Down	1	24 hrs.	1 min.	1 sec.	3 1/4"	2 1/2"	__	1/2"	Plastic	White	__	Yes	Alarm Built-In Stand Memory Function Repeat Function Voice Alerts	__	00000000	00000

Stopwatches

Quickly view starts and finishes on a digital screen.

Use stopwatches with a backlit display to time events in low-light conditions.

Stopwatches with a calibration certificate traceable to NIST have been tested to NIST standards to ensure accuracy.

				Case
Style	Timing Functions	Max. Timer Duration	Accuracy	Material	Color	Lens Material	Water Resistance	Batteries Included	Features	Includes		Each
Stopwatches
C	Count Up, Split, Clock	24 hrs.	±0.125 sec./hr.	Plastic	Green	Plastic	Water Resistant	Yes	Alarm, Backlit Display	Lanyard	0000000	000000
Stopwatches with Calibration Certificate Traceable to NIST
F	Count Up, Split, Lap, Pause, Clock	24 hrs.	±0.04 sec./hr.	Plastic	Black	Plastic	Water Resistant	Yes	Alarm	Lanyard	0000000	00000
G	Count Up, Split, Pause, Clock	24 hrs.	±0.4 sec./hr.	Plastic	Yellow	Plastic	Water Resistant	Yes	Alarm	Lanyard	0000000	00000