16A Relays | McMaster-Carr

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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

PLC Output Protection—Relays with PLC output protection prevent voltage spikes created by the relay from damaging the output channel on your programmable logic controller (PLC).

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



		5	24V AC	45	16 amp @ 240V AC	250	1/3 hp @ 120V AC	3.3"	0.6"	2.7"	LED Indicator, PLC Output Protection	7098K41	000000	7098K61	00000


		5	120V AC	8	16 amp @ 240V AC	250	1/3 hp @ 120V AC	3.3"	0.6"	2.7"	LED Indicator, PLC Output Protection	7098K42	00000	7098K62	00000
		5	240V AC	3.5	16 amp @ 240V AC	250	1/4 hp @ 120V AC	3.5"	0.6"	3"	LED Indicator	4144N22	00000	4026N12	0000
		5	12V DC	41	16 amp @ 240V AC	250	1/4 hp @ 120V AC	3.5"	0.6"	3"	LED Indicator	4144N11	00000	4026N11	0000
		5	24V DC	20	16 amp @ 240V AC	250	1/3 hp @ 120V AC	3.3"	0.6"	2.7"	LED Indicator, PLC Output Protection	7098K43	00000	7098K63	0000

Sequenced Latching Relays

These relays switch through a series of different circuit configurations every time they receive an input voltage. The input voltage latches them in position, so they don’t require a constant voltage to stay switched. Use them to control motors, pumps, and lighting. The covered terminals prevent contact with live connections. Mount to 35 mm DIN rail. Also known as step relays.

	Switching Current @ Voltage	Max. Switching Voltage, V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.		Each
1 Circuit Controlled—SPST-NO







	4 Terminals

	1st Signal—1 Off 2nd Signal—1 On	24V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T111	000000


	1st Signal—1 Off 2nd Signal—1 On	120V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T112	00000
	1st Signal—1 Off 2nd Signal—1 On	240V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T113	00000
	1st Signal—1 Off 2nd Signal—1 On	12V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T114	00000
	1st Signal—1 Off 2nd Signal—1 On	24V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T115	00000


	2 Circuits Controlled—DPST-1NO/1NC







					6 Terminals

					1st Signal—1 Off and 1 On 2nd Signal—1 Off and 1 On	24V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T131	00000


					1st Signal—1 Off and 1 On 2nd Signal—1 Off and 1 On	120V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T132	00000
					1st Signal—1 Off and 1 On 2nd Signal—1 Off and 1 On	240V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T133	00000
					1st Signal—1 Off and 1 On 2nd Signal—1 Off and 1 On	12V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T134	00000
					1st Signal—1 Off and 1 On 2nd Signal—1 Off and 1 On	24V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T135	00000


					2 Circuits Controlled—DPST-NO







									6 Terminals

									1st Signal—2 Off 2nd Signal—1 Off and 1 On 3rd Signal—2 On	24V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T141	00000


									1st Signal—2 Off 2nd Signal—1 Off and 1 On 3rd Signal—2 On	120V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T142	00000
									1st Signal—2 Off 2nd Signal—1 Off and 1 On 3rd Signal—2 On	240V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T143	00000
									1st Signal—2 Off 2nd Signal—1 Off and 1 On 3rd Signal—2 On	12V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T144	00000
									1st Signal—2 Off 2nd Signal—1 Off and 1 On 3rd Signal—2 On	24V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T145	00000
									1st Signal—2 Off 2nd Signal—2 On	24V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T121	00000
									1st Signal—2 Off 2nd Signal—2 On	120V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T122	00000
									1st Signal—2 Off 2nd Signal—2 On	240V AC	6.5 VA	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T123	00000
									1st Signal—2 Off 2nd Signal—2 On	12V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T124	00000
									1st Signal—2 Off 2nd Signal—2 On	24V DC	5 W	16 amp @ 120V AC	277	1/2 hp @ 120V AC	3.3"	0.7"	2.4"	6784T125	00000

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.

Start-Off Asymmetrical Repeat Cycle Timer—This function switches the relay off and alternates between different durations of on and off for as long as input voltage is applied. For example, an irrigation system receives a signal and starts in the off state, allowing water to fill before switching on to start pumping.

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.

Switch-Off Asymmetrical Repeat Cycle Timer—This function switches the relay off 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 input voltage that’s being applied the entire time. It could be used 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


		8	24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC	6.2	Asymmetrical Repeat Cycle Start-Off Asymmetrical Repeat Cycle Switch-On Asymmetrical Repeat Cycle Switch-Off Asymmetrical Repeat Cycle	8	0.05 sec. to 10 day	16 amp @ 240V AC	250	3.4"	0.9"	3.9"	6964K101	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


		12	120V AC, 240V AC, 110V DC, 240V DC	16	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	7105N12	000000

Hazardous Location Relays

Screw 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).

	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	24V AC, 24V DC	13.5	16 amp @ 240V AC/24V DC	400V AC/300V DC	3.5"	0.6"	2.9"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N15	000000


	5	48V AC, 48V DC	4	16 amp @ 240V AC/24V DC	400V AC/300V DC	3.5"	0.6"	2.9"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N17	00000
	5	120V AC, 120V DC	3.5	16 amp @ 240V AC/24V DC	400V AC/300V DC	3.5"	0.6"	2.9"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N19	00000
	5	240V AC, 240V DC	3.5	16 amp @ 240V AC/24V DC	400V AC/300V DC	3.5"	0.6"	2.9"	IP20	NEC Class I Division 2 Groups A, B, C, D	4190N22	00000

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

	8	12V DC	33	16 amp @ 240V AC	250	10,000,000	1.1"	0.5"	0.6"	0.1"	4026N11	00000


	8	110V DC	4.5	16 amp @ 240V AC	250	10,000,000	1.1"	0.5"	0.6"	0.1"	4026N12	0000

Energy-Saving Motor Starters

Save electricity and extend motor life by reducing the motor's starting current. These starters gradually start and stop motors. Use them on motors where torque varies, such as pumps, compressors, and conveyors. All have an auxiliary contact to send a signal or connect to another device, such as an alarm or indicating light.

		Switching			Time, sec.
Full Load Current, amp	Input Voltage, V DC	Voltage, V AC	Current, amp	Electrical Phase (Horsepower @ Switching Voltage)	Accel.	Deceleration	Aux. Contact Switch Starting Position	Ht.	Wd.	Dp.	Mounting Location	For DIN Rail Ht., mm	Certification		Each



	15	24	208 to 600	16	Three (5 hp @ 240V AC) Three (10 hp @ 480V AC)	1 to 20	0 to 20	1 Off	5.5"	1.8"	4.5"	DIN Rail, Surface	35	UL Listed, C-UL Listed, CE Marked	7112T44	0000000

Automatic Transfer Switches for Facility Lights

Restore lighting immediately during power outages. These switches detect when your main power source goes out and shift your lights to a backup, such as a secondary utility source or generator. To comply with UL 924 and help you meet NFPA standards, they turn your lights on at full brightness even if the lights were turned off or dimmed. You can also wire these switches to your fire alarm. Pull the alarm to activate lights to full brightness during emergencies, even without an outage. All have passed testing to meet UL 1008, a safety standard for transfer switches.

An LED indicator tells you whether lights are running on a primary or backup power source. The indicator also tells you when these switches require maintenance.

Remote Testing Buttons—Add a remote testing button to check if switches behind the wall or ceiling are working properly.

	Switches																	Remote Testing Buttons
	Switching						Housing			Mounting
	Current, amp	Voltage, V AC	Switch Designation	Electrical Phase	For No. of Wires	Housing Material	Ht.	Wd.	Dp.	Fasteners Included	No. of Holes	Hole Dia.	Features	Certification	Specs. Met		Each		Each
NEMA 1



		16	120 to 277	DPDT	Single	4	Powder-Coated Steel	8 5/16"	7 11/16"	3 15/16"	No	4	1/4"	LED Indicator	ETL Listed, CE Marked	UL 924, UL 1008	7934N11	0000000	8197N11	000000