Astronomical Timers | McMaster-Carr

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9 Products

Time and Day Activated Switches

Seven-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.

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

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

7-Day Timing Cycle
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Plug Type		Each
14 per Day	1 min.	Push Button	15 A @ 120 V AC	2	Astronomical Timing, Random On/Off Option	3"	3 1/2"	3 1/2"	Three Prong	0000000	000000

Outdoor Time and Day Activated Switches

Seven-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.

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.

											Mounting
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Plug Type	Cord Lg., ft.	Fasteners Included	No. of Holes	Hole Dia.	Min. Ht., ft.		Each
7-Day Timing Cycle
7 per Day	1 min.	Push Button	15 A @ 120 V AC	2	Astronomical Timing, Random On/Off Option	5 1/8"	5 1/4"	1 7/8"	Three Prong	2	No	2	0.31"	4.5	0000000	000000

Additional Trippers (Pkg. of 2 Pairs)

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Pkg.

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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.

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

7-Day Timing Cycle with Astronomical Timing
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Connection Type	Operating System Compatibility	For DIN Rail Ht., mm	Wire Connection Type		Each
1	16 A @ 240 V AC	120V AC/208V AC/240V AC/120V DC/240V DC	50 per Week	1 min.	Joystick	SPDT	3.4"	1.4"	2.2"	NFC	Android 5.1 or Later, iOS 13.1 or Later	35	Screw Terminals	00000000	0000000
2	16 A @ 240 V AC	120V AC/208V AC/240V AC/120V DC/240V DC	50 per Week	1 min.	Joystick	DPDT	3.4"	1.4"	2.2"	NFC	Android 5.1 or Later, iOS 13.1 or Later	35	Screw Terminals	00000000	000000

Outlet-Box-Mount Time and Day Activated Switches

Seven-Day 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.

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

7-Day Timing Cycle
No. of Circuits Controlled	Switching Current @ Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Features	For Outlet Box Type	Wire Connection Type	Wire Lead Lg.		Each
1	15 A @ 120 V AC	40 per Week	1 min.	Push Button	Astronomical Timing, Battery Backup, LCD Display	1 Device (1 Gang)	Wire Leads	6"	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.

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

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.

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

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	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
7-Day Timing Cycle
With Battery Backup, Lockout, Day Skipper, Astronomical Timing
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	SPDT	8 3/8"	5"	3 1/8"	No	0.26"	Screw Terminals	0000000	0000000
7-Day/365-Day Timing Cycle
With Battery Backup, Lockout, Astronomical Timing
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	4,000 per Year	1 min.	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	Screw Terminals	00000000	000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	4,000 per Year	1 min.	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	Screw Terminals	00000000	000000