E172124 Timer Relays | McMaster-Carr

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3 Products

DIN-Rail Mount Multifunction Timer Relays

Control multiple timing functions from your electrical cabinet—these timer relays mount to 35 mm DIN rail (also known as DIN 3 rail), which is the most commonly used size. UL Listed, C-UL Listed, or CE Marked, these relays meet American, Canadian, or European safety standards.

Timer Relays with Delayed, Interval, Switch On, and Repeat Cycles

1 Circuit

Controlled

Timer relays with delayed, interval, switch-on, and repeat cycles have a broad range of applications. Use them to precisely control machines such as conveyors, lighting systems, and electric motors.

Delayed Start (Delay on Make) Timer—This function allows you to set how long it takes for the relay to turn on after input voltage is applied. For example, a drill starts pumping lubricant immediately, but it does not start rotating until the set time has elapsed.

Delayed Switch Off (Delay on Break) Timer—This function uses a switch instead of input voltage. When the switch is turned off, the relay remains on for a programmed amount of time before turning off. For example, a projector’s light is turned off with a switch, but its cooling fan continues to run for a set time.

Delayed Switch-On with Delayed Switch-Off Timer—This function uses a switch instead of input voltage. It allows you to set how long the relay takes to turn on after a switch is turned on, and how long it will stay on after the switch is turned off. For example, a furnace turns on, but the fan doesn’t start pushing air through the vents until it has been heated. When the furnace turns off, the fan keeps blowing to circulate all the hot air.

Interval Timer—This function uses input voltage to turn on the relay for a programmed amount of time. For example, when a part moving down a conveyor reaches a certain location, a cleaning spray comes on for a set time.

Switch on (Single Shot) Timer—This function requires a switch to activate the relay, which stays on for the programmed amount of time. For example, lights in a storage room are turned on with a switch and stay on for a set time before turning off.

Repeat-Cycle Timer—This function starts with an on cycle and then alternates between an on cycle and off cycle of equal durations until input voltage is removed. A common example would be a flashing light.

					Timing Range
	No. of Terminals	Input Voltage	Control Current, mA	Timer Relay Function	No. of	Overall	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT



		6	12V AC, 24V AC, 48V AC, 120V AC, 240V AC, 12V DC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	7	Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Switch on (Single Shot) Repeat Cycle	6	0.1 sec. to 24 hr.	16 amp @ 240V AC	250	3.5"	0.7"	2.4"	6964K4	000000

Timer Relays with Asymmetrical Repeat Cycles

1 Circuit

Controlled

Use timer relays with asymmetrical repeat cycles when your repeat cycles have different on- and off-cycle durations.

Asymmetrical-Repeat-Cycle Timer—This function switches the relay on and alternates between different durations of on and off for as long as input voltage is applied. For example, a sprinkler system sprays in short bursts followed by longer rest periods, on and off until input voltage is removed.

Switch-On Asymmetrical Repeat Cycle Timer—This function switches the relay on and alternates between different durations of on and off for as long as input voltage is applied. It requires a switch to activate the timing function instead of the input voltage that’s being applied the entire time. You could use this function to turn on an electric motor for a short period and then turn it off for a longer rest period, repeating that pattern until the switch is turned off.

					Timing Range
	No. of Terminals	Input Voltage	Control Current, mA	Timer Relay Function	No. of	Overall	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT



		6	12V AC, 24V AC, 48V AC, 120V AC, 240V AC, 12V DC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	7	Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	6	0.1 sec. to 24 hr.	16 amp @ 240V AC	250	3.5"	0.7"	2.4"	6964K17	000000

High-Starting-Current DIN-Rail Mount Timer Relays

Reduce voltage fluctuations and stress on shafts and bearings when starting up three-phase motors. These timer relays start with motor contacts in a star configuration, then switch to a delta configuration after a set delay. Since star configuration takes less voltage to start than delta, these relays prevent voltage dips that often happen when a motor starts and are gentler on mechanical parts. Mount these relays directly to 35 mm DIN rail (also known as DIN 3 rail) for quick installation.

					Timing Range
	No. of Terminals	Input Voltage	Control Current, mA	Timer Relay Function	No. of	Overall	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.		Each
2 Circuits Controlled with 2 Off—DPST-NO



		5	24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 30V DC, 48V DC, 60V DC, 120V DC, 240V DC	5	Star-to-Delta	6	0.1 sec. to 20 min.	6 amp @ 12V AC to 250V AC, 240V AC	250	3.4"	0.7"	2.4"	8474N11	000000