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Timer Relays

What are Timer Relays?

A Timer Relay is a control relay with a time delay function built in. They serve as a combination of an electromechanical output relay and a control circuit, in which contacts can be opened or closed before or after a pre-selected timed interval. Relays can be normally open or normally closed and can be used to delay timed functions from milliseconds to hours or even days.

Timer Relay or Electromechanical Relay?

The difference between the timer relay and electromechanical relay is that when the output contacts open or close. On a conventional Control Relay, the contacts are opened or closed when a voltage is applied and removed from the coil, however, for timer relays the contacts will open or close before or after an intentional time period. When choosing the right Timer Relay, it is important to consider the kind of delay required for your application.

What are the Types of Timer Relays?

The most common timing function of Delay Relay are:

On Delay (Time delay starts on the application of voltage)
Off Delay (When a voltage is applied the relay is ready to accept a trigger)
Single Shot (One-shot)
Interval On (Interval) and Flasher (On First / Off First)
Repeat Cycle (When a voltage is applied the relay contacts change state and the timer starts)

When designing your application, it is important to understand the difference between the types of the Timer Delay Relays, considering what should initiate the delay and if it should start at the same time as the application, as well as when the voltage is released. More information can be found in our Timer Relays Guide

Timer Relays are triggered/initiated by either:

Voltage being applied or
The closing or opening of a trigger signal

Applications of Timer Relays

Delay Relays are typically used in industrial applications and OEM equipment play an important role for many industrial processes such as small panel or sub-panels requirements.

Lighting circuits
Motor start control
Sensitive equipment
Safety control
Conveyor belt sequence delay

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In Stock RS PRO DIN Rail Timer Relay, 3-Contact, 230 V dc 230V ac, 24 V ac, 0.1 to 100 h, 1-Function, SPDT Switch Configuration RS stock no. 119-803 Subtotal (1 unit) R 467,76(exc. VAT) R 467,76/unit Quantity	Timer Relay	-	-	DIN Rail	-	0.1 to 100 h	-	3	1	250V ac	SPDT	-	-	IP20	-	5A	-	-	-20°C	230, 24V ac	230 V dc	-	55°C	-	Screw	60mm	95mm	-	ROHS-3, CE, UKCA	23mm	-	-	-	-	-	-
In Stock RS PRO MCB-30 Series DIN Rail Timer Relay, 2-Contact, 24 V dc 24V ac, 240 V ac, 2 to 30 s, SPDT Switch Configuration RS stock no. 558-902 Subtotal (1 unit) R 365,58(exc. VAT) R 365,58/unit Quantity	Timer Relay	-	-	DIN Rail	-	2 to 30 s	-	2	-	-	SPDT	-	-	IP20	-	8A	-	-	-5°C	24, 240V ac	24 V dc	-	50°C	-	Screw	90mm	58mm	-	No	19mm	-	-	-	-	-	MCB-30
In Stock RS PRO Panel Timer Relay, 2-Contact, 230 V ac 230V ac, 0.1 to 999 min, SPDT Switch Configuration RS stock no. 434-508 Subtotal (1 unit) R 424,87(exc. VAT) R 424,87/unit Quantity	Timer Relay	-	90° Offset	Panel	-	0.1 to 999 min	-	2	-	240V ac	SPDT	-	-	IP20	-	5A	-	-	-20°C	230V ac	230 V ac	-	55°C	-	-	48mm	48mm	-	ROHS-3, CE-UKCA	69mm	-	-	-	-	-	-
In Stock RS PRO DIN Rail Timer Relay, 2-Contact, 230 V ac 230V ac, 0 to 100 h, 2-Function, 2 NO/1 NC Switch Configuration RS stock no. 323-890 Subtotal (1 unit) R 965,11(exc. VAT) R 965,11/unit Quantity	Timer Relay	-	-	DIN Rail	-	0 to 100 h	-	2	2	250V ac	2 NO/1 NC	-	-	IP20	-	8A	-	-	-25°C	230V ac	230 V ac	-	70°C	-	Screw	90mm	18mm	-	CE, C-Tick, UL94	9mm	-	-	-	-	-	-
In Stock RS PRO LMMT Series DIN Rail Timer Relay, 2-Contact, 230 V dc 230V ac, 24 V ac, 0.1 s to 100 h, Multifunction-Function, RS stock no. 102-6123 Subtotal (1 unit) R 973,81(exc. VAT) R 973,81/unit Quantity	Timer Relay	-	Multifunction	DIN Rail	-	0.1 s to 100 h	-	2	Multifunction	-	DPDT	-	-	-	-	8A	-	-	-20°C	230, 24V ac	230 V dc	Screwdriver Slot	60°C	-	Screw	66.5mm	89mm	-	CE, IEC, UL	17.5mm	-	-	-	-	-	LMMT
In Stock RS PRO 11RD Series DIN Rail Timer Relay, 1-Contact, 24 V dc 110V ac, 24 V ac, 0.3 s to 30 h, 1-Function, SPDT Switch RS stock no. 896-6829 Subtotal (1 unit) R 766,89(exc. VAT) R 766,89/unit Quantity	Timer Relay	-	Offset Double Ring End, Valve, Timer, Signal Off Delay	DIN Rail	-	0.3 s to 30 h	-	1	1	-	SPDT	-	-	-	-	-	-	-	-10°C	110, 24V ac	24 V dc	-	55°C	-	Screw	58.5mm	17.5mm	-	RoHS	90mm	-	-	-	-	-	11RD
In Stock RS PRO DIN Rail Timer Relay, 1-Contact, 12 to 240 V dc 12V ac, 240 V ac, 0 to 10 Days, 10-Function, SPDT Switch RS stock no. 360-684 Subtotal (1 unit) R 886,22(exc. VAT) R 886,22/unit Quantity	Timer Relay	-	Multifunction	DIN Rail	-	0 to 10 Days	-	1	10	250V ac	SPDT	-	-	-	-	16A	-	-	-20°C	12, 240V ac	12 to 240 V dc	Swedish Pipe	55°C	-	-	17.6mm	90mm	-	RoHS	64mm	-	-	-	-	-	-
In Stock RS PRO DIN Rail Timer Relay, 3-Contact, 230 V ac 230V ac, 0.1 to 30 s, 1-Function, SPDT Switch Configuration RS stock no. 119-807 Subtotal (1 unit) R 678,80(exc. VAT) R 678,80/unit Quantity	Timer Relay	-	Offset Double Ring End	DIN Rail	-	0.1 to 30 s	-	3	1	250V ac	SPDT	-	-	IP20	-	5A	-	-	-20°C	230V ac	230 V ac	-	55°C	-	Screw	65.4mm	95mm	-	UKCA, ROHS-3, CE	23mm	-	-	-	-	-	-
In Stock RS PRO DIN Rail Timer Relay, 2-Contact, 230 V ac 230V ac, 0.1 to 99 min, SPDT Switch Configuration RS stock no. 434-509 Subtotal (1 unit) R 438,81(exc. VAT) R 438,81/unit Quantity	Timer Relay	-	Timer	DIN Rail	-	0.1 to 99 min	-	2	-	250V ac	SPDT	-	-	IP20	-	5A	-	-	-20°C	230V ac	230 V ac	-	55°C	-	-	90mm	23.15mm	-	CE-UKCA ROHS-3	57.75mm	-	-	-	-	-	-
In Stock RS PRO 2 AS Series DIN Rail Timer Relay, 2-Contact, 24 V dc 24V ac, 240 V ac, 3 to 120 s, 1-Function, SPST Switch RS stock no. 896-6857 Subtotal (1 unit) R 1 344,58(exc. VAT) R 1 344,58/unit Quantity	Timer Relay	-	Valve	DIN Rail	-	3 to 120 s	-	2	1	-	SPST	-	-	-	-	-	-	-	-15°C	24, 240V ac	24 V dc	-	60°C	-	Screw	100.5mm	22.5mm	-	RoHS	75mm	-	-	-	-	-	2 AS
In Stock RS PRO RS PRO Series Timer Relay, 11-Contact, 12 to 250 V dc 12V ac, 240 V ac, 0.1 s to 10 min, 1-Function, 2 x SPDT RS stock no. 178-5024 Subtotal (1 unit) R 2 303,34(exc. VAT) R 2 303,34/unit Quantity	Timer Relay	-	Valve	-	-	0.1 s to 10 min	-	11	1	250V	2 x SPDT	-	-	-	-	8A	-	-	-20°C	12, 240V ac	12 to 250 V dc	-	65°C	-	11-Pin	74mm	48mm	-	CE, RoHS, EN61000-6-2, EN61010-1, EN61000-6-4	24mm	-	-	-	-	-	RS PRO
In Stock RS PRO LEDO Series DIN Rail Timer Relay, 12 to 230 V ac/dc 12V ac, 230 V ac, 0.1 s to 100 h, Multifunction-Function, RS stock no. 102-6125 Subtotal (1 unit) R 967,11(exc. VAT) R 967,11/unit Quantity	Timer Relay	-	Multifunction	DIN Rail	-	0.1 s to 100 h	-	-	Multifunction	-	DPDT	-	-	-	-	8A	-	-	-20°C	12, 230V ac	12 to 230 V ac/dc	-	60°C	-	Screw	92mm	89mm	-	RoHS	17.5mm	-	-	-	-	-	LEDO
In Stock RS PRO TKB Series Timer Relay, 2-Contact, 24 V dc 24V ac, 0.1 to 1 s, 1-Function, DPDT Switch Configuration RS stock no. 179-2947 Subtotal (1 unit) R 828,44(exc. VAT) R 828,44/unit Quantity	Timer Relay	-	-	-	-	0.1 to 1 s	-	2	1	-	DPDT	-	-	-	-	5A	-	-	-10°C	24V ac	24 V dc	Dial	55°C	-	8-Pin	2.8mm	53mm	-	RoHS	21.5mm	-	-	-	-	-	TKB
In Stock RS PRO 2AN Series DIN Rail Timer Relay, 1-Contact, 24 V dc 24V ac, 240 V ac, 0.1 s to 10 h, Multifunction-Function, SPDT RS stock no. 896-6850 Subtotal (1 unit) R 1 348,54(exc. VAT) R 1 348,54/unit Quantity	Timer Relay	-	Valve	DIN Rail	-	0.1 s to 10 h	-	1	Multifunction	-	SPDT	-	-	-	-	-	-	-	-15°C	24, 240V ac	24 V dc	-	60°C	-	Screw	100.5mm	75mm	-	RoHS	22.5mm	-	-	-	-	-	2AN
Temporarily out of stock RS PRO Plug-in Digital Counter Timer Relay, 8-Contact 100 V ac, 240 V ac, 99 min 59 s, 1-Function, SPDT Switch RS stock no. 179-2909 Subtotal (1 unit) R 1 915,56(exc. VAT) R 1 915,56/unit Quantity	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
In Stock RS PRO DIN Rail Timer Relay, 3-Contact, 12 to 240 V ac 12V ac, 240 V ac, 0.1 to 100 h, 1-Function, SPDT Switch RS stock no. 119-805 Subtotal (1 unit) R 620,86(exc. VAT) R 620,86/unit Quantity	Timer Relay	-	-	DIN Rail	-	0.1 to 100 h	-	3	1	250V ac	SPDT	-	-	IP20	-	5A	-	-	-20°C	12, 240V ac	12 to 240 V ac	-	55°C	-	Screw	65.4mm	91mm	-	UKCA, CE	17.8mm	-	-	-	-	-	-
In Stock RS PRO VLL005 - 07 Series DIN Rail Timer Relay, 2-Contact, 24 V dc 24V ac, 240 V ac, 01. s to 999 h, RS stock no. 896-6866 Subtotal (1 unit) R 1 261,08(exc. VAT) R 1 261,08/unit Quantity	Timer Relay	-	Multifunction	DIN Rail	-	01. s to 999 h	-	2	Multifunction	240V ac/dc	DPST	-	-	-	-	8A	-	-	-10°C	24, 240V ac	24 V dc	-	55°C	-	Screw	85.0mm	89mm	-	RoHS	17.5mm	-	-	-	-	-	VLL005 - 07
Limited stock RS PRO DIN Rail Timer Relay, 1-Contact, 12 to 240 V dc 12V ac, 240 V ac, 0 to 100 h, 10-Function, SPDT Switch RS stock no. 360-688 Subtotal (1 unit) R 793,79(exc. VAT) R 793,79/unit Quantity	Timer Relay	-	-	DIN Rail	-	0 to 100 h	-	1	10	250V ac	SPDT	-	-	IP40, IP20	-	16A	-	-	-20°C	12, 240V ac	12 to 240 V dc	Swedish Pipe	55°C	-	-	90mm	64mm	-	EN 61812-1	17.6mm	-	-	-	-	-	-
In Stock RS PRO TCR Series Panel Timer Relay, 2-Contact, 100 to 125 V dc 110V ac, 0.1 s to 300 h, Multifunction-Function, DPDT RS stock no. 179-2921 Subtotal (1 unit) R 1 310,65(exc. VAT) R 1 310,65/unit Quantity	Timer Relay	-	-	Panel	-	0.1 s to 300 h	-	2	Multifunction	-	DPDT	-	-	-	-	5A	-	-	-10°C	110V ac	100 to 125 V dc	Dial	55°C	-	11-Pin	48mm	52.3mm	-	RoHS	48mm	-	-	-	-	-	TCR
In Stock RS PRO EZM Series Panel Timer Relay, 1-Contact, 230 V dc 230V ac, 1-Function, SPDT Switch Configuration RS stock no. 808-6620 Subtotal (1 unit) R 1 686,33(exc. VAT) R 1 686,33/unit Quantity	Timer Relay	-	Multifunction	Panel	-	-	-	1	1	-	SPDT	-	-	IP65	-	50mA	-	-	0°C	230V ac	230 V dc	Switch	50°C	-	Screw	48mm	95.5mm	-	RoHS, CE	48mm	-	-	-	-	-	EZM