Astronomical Timers | McMaster-Carr

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9 Products

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.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week.

365-Day Timing Cycle—Seven-day/365-day switches can perform a different program each day of the week or year, and compensate for leap year and daylight savings time. Override regular programming for up to 99 holidays for any length of time. They can also be used to activate equipment such as bells and signals for just a few seconds.

Astronomical Timing—Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

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

												Mounting
	No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage, V AC	Max. On/Off Cycles	Min. Set Time, min.	Timing Adjustment Style	Housing Material	Switch Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Knockout Trade Size	Wire Connection	Environment	Certification		Each
7 day—With Battery Backup, Lockout, Day Skipper, Astronomical Timing



		1	30 amp @ 240V AC	120/208/240/277	20 per day	1	Push Button	Polycarbonate	SPDT	8 3/8"	5"	3 1/8"	No	0.26"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed	0000000	0000000


		7 day/365 day—With Battery Backup, Lockout, Astronomical Timing



				1	30 amp @ 240V AC	120/208/240/277	4,000 per yr.	1	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed, CSA Certified	00000000	000000


				2	30 amp @ 240V AC	120/208/240/277	4,000 per yr.	1	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed, CSA Certified	00000000	000000

Outlet-Box-Mount Time and Day Activated Switches

7-Day Timing

Cycle

Switches fit 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.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week.

Astronomical Timing—Use the astronomical timing to turn lights on and off based on sunrise and sunset; this option can be used independently or in combination with timed programming.

	Switching Current @ Voltage	Max. On/Off Cycles, per wk.	Min. Set Time, min.	Timing Adjustment Style	For Outlet Box Designation	Wire Connection	Wire Lead Lg.	Certification		Each
7-Day Timing Cycle—With Astronomical Timing, Battery Backup, LCD Display



	1	15 amp @ 120V AC	40	1	Push Button	1 Gang	Wire Leads	6"	CSA-US Certified, CSA Certified	0000000	000000

Outdoor Time and Day Activated Switches

7-Day 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.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week. They have astronomical timing that can be set to turn lights on and off based on sunrise and sunset.

										Electrical			Mounting
	Max. On/Off Cycles, per day	Min. Set Time, min.	Timing Adjustment Style	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Connection	No. of Blades	Cord Lg., ft.	Fasteners Included	No. of Holes	Hole Dia.	Min. Ht., ft.		Each
7-Day Timing Cycle



		7	1	Push Button	15 amp @ 120V AC	2	Astronomical Timing, Random On/Off Option	5 1/8"	5 1/4"	1 7/8"	Straight Blade	3	2	No	2	0.31"	4.5	0000000	000000

Trippers

		Pkg.
Additional Trippers (Pkg. of 2 Pairs)	0000000	00000

Smart Time and Day Activated Switches

Use your smart phone to turn equipment on and off at a set time and day. These switches connect to your phone via NFC (near field communication) and work with a free app to set schedules, adjust settings, and save programs. They can perform a different program each day of the week, and they compensate for leap year and daylight savings time. You can remotely apply programs across compatible switches, so it’s easy to reprogram lighting or equipment in large facilities. These switches mount to a flat surface or attach to DIN rail.

Astronomical Timing—Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

	Switching Current @ Voltage	Input Voltage	Max. On/Off Cycles, per wk.	Min. Set Time, min.	Timing Adjustment Style	Switch Designation	Ht.	Wd.	Dp.	Electrical Connection	Operating System Compatibility	For DIN Rail Ht., mm	Wire Connection	Certification		Each
7-Day Timing Cycle—With Astronomical Timing



	1	16 amp @ 240V AC	120V AC/208V AC/240V AC/120V DC/240V DC	50	1	Joystick	SPDT	3.4"	1.4"	2.2"	NFC	Android 5.1 or Later, iOS 13.1 or Later	35	Screw Terminal	UL Listed, C-UL Listed, CE Marked	00000000	0000000


	2	16 amp @ 240V AC	120V AC/208V AC/240V AC/120V DC/240V DC	50	1	Joystick	DPDT	3.4"	1.4"	2.2"	NFC	Android 5.1 or Later, iOS 13.1 or Later	35	Screw Terminal	UL Listed, C-UL Listed, CE Marked	00000000	000000

Time and Day Activated Switches

7-Day 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.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week.

Astronomical Timing—Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

										Electrical
	Switching Current @ Voltage	Max. On/Off Cycles, per day	Min. Set Time, min.	Timing Adjustment Style	With Override	No. of Outlets	Ht.	Wd.	Dp.	Connection	No. of Blades	Certification		Each
7-Day Timing Cycle—With Astronomical Timing, Random On/Off Option



		15 amp @ 120V AC	14	1	Push Button	Yes	2	3"	3 1/2"	3 1/2"	Straight Blade	3	UL Listed, C-UL Listed	0000000	000000