12V AC Relays | McMaster-Carr

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28 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

2 Circuits

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.

Delayed-Pulse Timer—This function uses input voltage to turn on the relay for a brief period after a preset time. For example, a light flashes a few seconds after a door closes.

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.

Interval Switch-Off Timer—This function requires a switch to activate the relay, which stays off 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.

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.

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

Switch Fixed On/Off Timer—This function requires a switch to activate the timing function instead of the input voltage (which is applied the entire time). It keeps the relay on whenever the switch is closed; it will only turn off if the switch is open.

					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


		8	12V AC, 24V AC, 48V AC, 120V AC, 240V AC, 12V DC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	6	Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Delayed Pulse Interval Interval Switch-Off Switch on (Single Shot) Repeat Cycle Start-Off Repeat Cycle Switch Fixed On/Off	8	0.1 sec. to 10 day	8 amp @ 240V AC	250	4.1"	0.7"	2.6"	6964K102	00000


		2 Circuits Controlled with 2 Off or 2 On—DPDT



				8	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 Delayed Pulse Interval Interval Switch-Off Switch on (Single Shot) Repeat Cycle Start-Off Repeat Cycle Switch Fixed On/Off	8	0.1 sec. to 10 day	8 amp @ 240V AC	250	4.1"	0.7"	2.6"	6964K103	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

DIN-Rail Mount Interface Relays

Isolate input and output circuits to prevent damage from voltage spikes, reduce signal interference, and amplify signal. These relays interface between your controller and components—they receive a signal from the controller to switch power on or off to the components. All have an LED indicator that shows you if your switch is actuated, so you know it’s connected and wired correctly. Use them to communicate signals to devices like motors or sensors. Mount them on 35 mm DIN rail (also known as DIN 3 rail).

1 Circuit Controlled with 1 Off or 1 On—SPDT


With Screw Terminals	With Spring-Clamp Terminals

With Spring-Clamp Terminals—Relays with spring-clamp terminals connect and disconnect to wires without needing to turn screws. Because there is no screw, these connections have less risk of loosening over time than screw terminals, even when there is vibration.

	Interface Relays											Replacement Relays
	No. of Terminals	Input Voltage	Control Current, mA	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.	Features		Each		Each
With Screw Terminals



		5	12V AC, 12V DC	16	6 amp @ 240V AC	250	3.5"	0.2"	3"	LED Indicator	8262T14	000000	8262T15	00000


		With Spring-Clamp Terminals



				5	12V AC, 12V DC	16	6 amp @ 240V AC	250	3.7"	0.2"	3"	LED Indicator	4144N15	00000	8262T15	0000

Circuit Board Relays


8 Terminals	5 Terminals	6 Terminals	14 Terminals

Smaller than relays with electrical wiring, these relays fit in compact devices. Mount them through holes on circuit boards with their solder pin terminals. Use them to control heaters, fans, and other high-power components from a low-power circuit.

	Switching Current @ Voltage	Max. Switching Voltage, V AC	Mechanical Life Cycles	Ht.	Wd.	Dp.	Pin Lg.		Each
Mechanical Operation







	1 Circuit Controlled with 1 Off or 1 On—SPDT

	5	12V AC, 12V DC	14	6 amp @ 240V AC	250	10,000,000	1.1"	0.2"	0.6"	0.14"	8262T15	00000

Dual-Channel DIN-Rail Mount Multifunction Timer Relays

Control two steps of an electrical process from a single relay—with two fully independent channels and 30 different functions, these relays give you a wide range of possibilities. Each channel has its own output, so you can run two different functions (one per circuit) at the same time. Mount them to 35 mm DIN rails (also known as DIN 3 rail) and connect them to lighting systems, conveyors, electric motors, and other systems. These relays are UL Listed, C-UL Listed, and CE Marked, meaning they meet U.S. and international safety standards.

View times, function names, and on/off status for both channels at once using the digital display. You can program these relays with a joystick on the face, which is easier to use than the rotary dials on traditional relays. You can also program them using an Android phone with NFC (near field communication) capability, which is commonly used for mobile payment. Once you select the functions you need, hold the phone against the relay to program.

Connect switches to inputs on these relays to trigger, pause, and reset functions. Turning on a switch connected to the pause input stops functions until the switch is turned off. A switch connected to the reset input will start functions from the beginning. If the relay is actively receiving a signal, the function will restart right away. If there is no signal, the function will stop and reset, so it starts from the beginning the next time it’s triggered. You can use switches to pause or reset both channels at once, or for one channel only.

Although these relays have 30 different functions, they all fall into 10 categories. Within these categories, you can select different functions to allow you to add a switch, program a delay, or change how the relay responds to a trigger (turning on or off, pausing, or resetting).

Delayed Start (Delay on Make) Timer—These functions allow 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—These functions use 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 an input voltage. It allows you to set how long it takes the relay 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—These functions use 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 amount of time.

Switch on (Single Shot) Timer—These functions require 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—When input voltage is applied, the relay turns on for a duration, then off for the same duration. They alternate between the two until input voltage is removed. For example, a flashing light stays on and off for equal periods of time.

Asymmetrical-Repeat-Cycle Timer—These functions start with an on-cycle and then have an off-cycle, but these cycles have different durations. The cycles repeat until input voltage is removed. For example, a sprinkler system sprays in short bursts followed by longer rest periods, on and off until input voltage is removed.

Manual-Switch-Control Timer—Use these functions to turn the relay on and off with a switch.

Fixed On/Off Timer—The on function keeps the relay on whenever input voltage is applied; it will only turn off if the voltage is removed. The off function keeps the relay in an off state, even if input voltage is applied.

Switch-On Asymmetrical Repeat Cycle Timer—These functions require a switch to activate the timing function. The input voltage is applied the whole time, and when you turn the switch on, the relay begins with an on-cycle followed by an off-cycle. These cycles have different durations, and they repeat until you turn the switch off. They could be used to turn on a motor or other system for a short period and then turn it off for a longer rest period, repeating that pattern until the switch is turned off.

Proximity Sensor Compatability (PNP and NPN)—Use relays with proximity sensor compatibility to activate functions when your sensor is triggered, such as when an object approaches or a liquid level changes. These relays are compatible with both standard styles of sensors, PNP and NPN, and are often used for warning signals, motion-detecting light and heating systems, and automated assembly lines.

					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.	Features		Each
2 Circuits Controlled with 2 Off and 2 On—DPDT



		12	12V AC, 24V AC, 12V DC, 24V DC	8	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	30	0.1 sec. to 9,999 hr.	16 amp @ 240V AC	240	3.4"	1.4"	2.2"	2 Individually Programmable Timers, LCD Screen, Proximity Sensor Compatability (PNP and NPN)	7105N11	0000000

Circular-Pin Relays


8-Terminal Relay (2 Circuits Controlled)	Relay Socket for 8-Terminal Relay	Relay Socket for 11-Terminal Socket

The circular pin terminals plug into relay sockets for easy installation. Also known as ice cube relays.

Lockable Test Button—Relays with a lockable test button allow you to test whether a relay is working without an electrical signal. They’re helpful for testing relays before you install them, or for checking that installed relays are working properly.

Horsepower @ Switching Voltage—Relays rated for horsepower (hp) are built to handle tough, repetitive-use applications.

Sockets with Screw Terminals—Relay sockets (sold separately) mount to 35 mm DIN rail (also known as DIN 3 rail) or can be mounted to a flat surface.

	Relays												Sockets with Screw Terminals
	No. of Terminals	Input Voltage, V AC	Control Current, mA	Switching Current @ Voltage	Max. Switching Voltage, V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.	Features		Each		Each
2 Circuits Controlled with 2 Off or 2 On—DPDT







				Relay-Socket Mount

				8	12	193	10 amp @ 240V AC	250	—	1.4"	1.4"	2.1"	Lockable Test Button	7170K42	000000	7122K19	00000


				8	12	250	10 amp @ 277V AC/30V DC	—	1/3 hp @ 120V AC 1 hp @ 277V AC	1.4"	1.38"	2.2"	—	7580T45	00000	7122K19	0000

Solid State Screw Terminal Relays


1-Circuit Relay with Covered Terminals and LED Indicator	1-Circuit Relay with LED Indicator	1-Circuit Relay with Covered Terminals	1-Circuit Relay

With no moving parts, these solid-state relays are fast switching and require less maintenance, last longer, and are quieter than mechanical switches.

Relays with High-Starting-Current Protection—Relays with high-starting-current protection are designed with integrated circuits that prevent damage from the large burst of electricity when a device, such as a motor or pump, turns on.

			Switching Current @ Voltage
	No. of Terminals	Input Voltage	Without Heat Sink	With Heat Sink, amp	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.		Each
1 Circuit Controlled with 1 Off—SPST-NO







				Relays with High-Starting-Current Protection

				4	12V AC, 24V AC, 3V DC, 6V DC, 12V DC, 24V DC, 30V DC	7.5 amp @ 300V AC	25	300	2.3"	1.8"	1.1"	7456K14	0000000


				1 Circuit Controlled with 1 On—SPST-NC







								Relays with High-Starting-Current Protection

								4	12V AC, 24V AC, 3V DC, 6V DC, 12V DC, 24V DC, 30V DC	7.5 amp @ 300V AC	25	300	2.3"	1.8"	1.1"	7456K16	000000

Hazardous Location Relays


Screw Terminals	Spring-Clamp Terminals

Sealed for safety, these relays are a good choice for hazardous locations where combustible or corrosive gases may be present.

Screw Terminals—Relays with screw terminals are considered interface relays, so they’re placed between your controller and components to isolate the input and output circuits. This means they protect your component from voltage spikes while amplifying the relay’s signal and reducing interference for reliable transmission. They are often used for switching applications, such as small motors and pilot lights. The included relay socket mounts on 35 mm DIN rail (also known as DIN 3 rail).

Spring-Clamp Terminals—Relays with spring-clamp terminals are considered interface relays, so they’re placed between your controller and components to isolate the input and output circuits. This means they protect your component from voltage spikes while amplifying the relay’s signal and reducing interference for reliable transmission. They are often used for switching applications, such as small motors and pilot lights. The included relay socket mounts on 35 mm DIN rail (also known as DIN 3 rail). Relays with spring-clamp terminals connect and disconnect to wires without needing to turn screws. With no screws to shake loose with vibration, the terminals hold tight over time.

	Switching Current @ Voltage	Max. Switching Voltage	Ht.	Wd.	Dp.	Enclosure Rating	Hazardous Location Rating		Each
Screw Terminals







	1 Circuit Controlled with 1 Off or 1 On—SPDT

	5	12V AC, 12V DC	15.5	6 amp @ 240V AC/30V DC	400V AC/125V DC	2.9"	0.2"	3.5"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N311	000000


	5	12V AC, 12V DC	29	12 amp @ 240V AC/24V DC	400V AC/300V DC	2.9"	0.6"	3.5"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N312	00000


	Spring-Clamp Terminals







					1 Circuit Controlled with 1 Off or 1 On—SPDT

					5	12V AC, 12V DC	15.5	6 amp @ 240V AC/30V DC	400V AC/125V DC	2.9"	0.2"	3.7"	IP20	NEC Class I Division 2 Groups A, B, C, D	8163N11	00000


					5	12V AC, 12V DC	29	12 amp @ 240V AC/24V DC	400V AC/300V DC	2.9"	0.6"	3.7"	IP20	NEC Class I Division 2 Groups A, B, C, D	8163N14	00000

Washdown Enclosed Relays

A NEMA 4X enclosure protects these relays from washdowns, dirt, and corrosion. It also keeps terminals from being bumped accidentally, so you can mount these relays near working areas. Hardwire to your equipment with the wire leads.

									Wire Lead		Conduit Connection
	Input Voltage	Control Current, mA	Switching Current @ Voltage	Max. Switching Voltage, V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.	Lg.	No. of	Gender	Trade Size	Thread Type		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT



		12V AC, 24V AC, 120V AC, 12V DC, 24V DC, 30V DC	28	10 amp @ 277V AC	277	1/3 hp @ 240V AC	1.7"	2.8"	1.5"	16"	6	Male	1/2	NPT	4766T11	000000


		12V AC, 24V AC, 208V AC, 240V AC, 277V AC, 12V DC, 24V DC, 30V DC	39	10 amp @ 277V AC	277	1/3 hp @ 240V AC	1.7"	2.8"	1.5"	16"	6	Male	1/2	NPT	4766T12	00000

Spade-Terminal Relays

Using a low-current signal, these relays are often used to control small motors and heaters. These relays attach to quick-disconnect terminals.

Relay-Socket Mount


8 Terminals	Sockets with Screw Terminals

Relay-socket mount relays, also known as ice cube relays, offer three ways to connect. Plug them into a socket (sold separately), connect them with quick-disconnect terminals, or solder wires directly to the terminals.

Sockets with Screw Terminals—Relay sockets mount directly on 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They can also mount to a flat surface.

	Relays											Sockets with Screw Terminals
	No. of Terminals	Input Voltage, V AC	Control Current, mA	Max. Switching Voltage, V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.		Each		Each
2 Circuits Controlled with 2 Off or 2 On—DPDT



		8	12	168	250	1/3 hp @ 120V AC 1/2 hp @ 240V AC	1.4"	1.5"	1.9"	0.187"	7266K79	000000	7266K17	000000

Smart DIN-Rail Mount Multifunction Timer Relays

1 Circuit Controlled

Whether installed in an electrical cabinet or hard-to-reach area, these timer relays are controlled remotely from your smartphone. They connect to your phone via a free downloadable app with NFC (Near Field Communication), so you can set time delay ranges, adjust settings, and save programs. An LED indicator on the relay shows that your switch is on and whether it’s actuated. Mount them directly to 35 mm DIN rail (also known as DIN 3 rail).

Although these relays have 30 different functions, they all fall into 11 categories. Within these categories, you can select different functions to allow you to add a switch, program a delay, or change how the relay responds to a trigger (turning on or off, pausing, or resetting).

Repeat-Cycle Timer—These functions start with an on cycle and then alternate between an on cycle and off cycle of equal durations until input voltage is removed, such as with a flashing light.

Manual-Switch-Control Timer—Use these functions to turn the relay on and off with a switch.

	Input Voltage	Control Power, W	Timer Relay Function	Overall Timing Range	Switching Current @ Voltage	Max. Switching Voltage, V AC	Ht.	Wd.	Dp.	Operating System Compatibility	Features		Each
1 Circuit Controlled with 1 Off or 1 On—SPDT



	8	12V AC, 24V AC, 48V AC, 120V AC, 240V AC, 12V DC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	0.15	Manual Switch Control Fixed On/Off Switch on (Single Shot) Delayed Start (Delay on Make) Delayed Switch Off (Delay on Break) Delayed Switch-On with Delayed Switch-Off Interval Repeat Cycle Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle	0.1 sec. to 999 day	8 amp @ 240V AC	250	4.1"	0.7"	2.5"	Android 5.0 or Later, iOS 14.4 or Later	LED Indicator	8491N12	000000

Solid State Surface-Mount Timer Relays

Attach these relays to a flat surface using the mounting hole. They have no moving parts, so compared to mechanical switches, they require less maintenance, last longer, and are quieter.

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

Potentiometer—Switches with a potentiometer (variable switch) allow you to adjust the delay within the range.

				Timing Range
	No. of Terminals	Input Voltage	Control Current, mA	No. of	Overall	Switching Current @ Voltage	Ht.	Wd.	Dp.	Features		Each
Delayed Start (Delay on Make)







				1 Circuit Controlled with 1 Off—SPST-NO

				2	12V AC, 12V DC	21	1	0.05 sec. to 1 sec.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K731	0000000


				2	12V AC, 12V DC	21	1	0.25 sec. to 5 sec.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K732	000000
				2	12V AC, 12V DC	21	1	0.5 sec. to 10 sec.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K733	000000
				2	12V AC, 12V DC	21	1	3 sec. to 60 sec.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K734	000000
				2	12V AC, 12V DC	21	1	15 sec. to 300 sec.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K735	000000
				2	12V AC, 12V DC	21	1	30 sec. to 10 min.	1 amp @ 120V AC	2"	2"	0.89"	Potentiometer	77055K736	000000