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

Browse the broad range of Timer Relays RS have to offer and order today for fast delivery.

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Coupatan Panel Mount Timer Relay, 0 → 30min, DPDT N° de stock RS: 536-2555 Documentation technique: 45,62 € la pièce	Coupatan	-	Panel Mount	0 → 30min	-	-	-	-	DPDT	-	External	-	-	-	DPDT	-	-	47.5mm	-	-	30mm	45.5mm	+125°C	-
Lovato DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 0.1 s → 100days, SPDT N° de stock RS: 905-3479 Référence fabricant: TMPL Documentation technique: 79,75 € la pièce	Lovato	12 → 240V ac/dc	DIN Rail	0.1 s → 100days	Flasher OFF, Flasher ON, Programmable Asymmetrical Recycle Time Relay	2	Multi Function	-	SPDT	Days, Hours, Minutes, Seconds	External	8A	-	240V ac	SPDT	Screw	12V ac	104.7mm	-	-	64.9mm	17.5mm	+60°C	8A
RS PRO Panel Mount Timer Relay, 24V ac/dc, 1-Contact, 1-Function, SPDT N° de stock RS: 808-6623 Documentation technique: 110,53 € la pièce	RS PRO	24V ac/dc	Panel Mount	-	One Shot	1	Single	-	SPDT	Hours, Minutes, Seconds	External	0.05A	-	24V ac/dc	SPDT	-	-	48mm	-	-	48mm	95.5mm	+50°C	-
GIC DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, SPDT N° de stock RS: 818-4563 Référence fabricant: 1CMDT0 Documentation technique: 40,70 € la pièce	GIC	12 → 240V ac/dc	DIN Rail	0.1 s → 100h	Accumulative Delay ON Signal, Cyclic OFF/ON, Cyclic ON/OFF, Impulse ON/OFF, Leading Edge Bi-stable, Leading Edge Impulse, Signal OFF/ON, Signal ON/OFF Delay, Trailing Edge Impulse	1	Multi Function	-	SPDT	Hours, Minutes, Seconds	External	6A	-	240V ac/dc	SPDT	Screw	12V ac/dc	18mm	-	-	65mm	85mm	+60°C	-
Dold UG6960 Series DIN Rail Mount Timer Relay, 24V dc, 4-Contact, 300s, DPST N° de stock RS: 181-2777 Référence fabricant: UG6960.04PS/100/61 DC24V 300s Documentation technique: 510,04 € la pièce	Dold	24V dc	DIN Rail	300s	Continuous	4	Multi Function	UG6960	DPST	Seconds	-	2A	-	24V dc	-	Screw	-	120.3mm	-	-	110mm	22.5mm	+55°C	-
Carlo Gavazzi DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 2-Contact, 0.1 s → 100h, SPDT N° de stock RS: 857-7539 Référence fabricant: DMB51CW24 Documentation technique: 62,70 € la pièce	Carlo Gavazzi	12 → 240V ac/dc	DIN Rail	0.1 s → 100h	Delay ON, Delay ON Release, Double Interval, Interval, Interval On Trigger Open, Symmetrical Recycler OFF, Symmetrical Recycler ON	2	Multi Function	-	SPDT	Hours, Minutes, Seconds	External	5A	-	-	SPDT	Screw	-	17.5mm	-	-	81mm	67.2mm	+60°C	-
Tele E1ZM10 Series DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.05 s → 100h, SPDT N° de stock RS: 160-284 Référence fabricant: E1ZM10 12-240V AC/DC Documentation technique: 78,58 € la pièce	Tele	12 → 240V ac/dc	DIN Rail	0.05 s → 100h	Flash Pause First, OFF Delay, ON Delay, ON Delay with Control Contact, One Shot Leading Edge Voltage Controlled, One Shot Leading Edge with Control Contact, One Shot Trailing Edge with Control Contact	1	Multi Function	E1ZM10	SPDT	Hours, Milliseconds, Minutes, Seconds	External	8A	-	250V ac	SPDT	-	-	17.5mm	-	-	65mm	87mm	+55°C	-
Lovato DIN Rail Mount Timer Relay, 24 → 240 V ac, 24 → 48V dc, 2-Contact, 0.1 s → 10days, N° de stock RS: 905-3463 Référence fabricant: TMP Documentation technique: 47,86 € la pièce	Lovato	24 → 240 V ac, 24 → 48V dc	DIN Rail	0.1 s → 10days	ON Delay	2	Single	-	SPDT	Days, Hours, Minutes, Seconds	External	8A	-	240V ac	SPDT	Screw	24V ac	104.7mm	-	-	64.9mm	17.5mm	+60°C	-
WAGO 857 Series DIN Rail Mount Timer Relay, 250V, 1-Contact, 0.1 s → 300 min, SPDT N° de stock RS: 279-2531 Référence fabricant: 857-604 Documentation technique: 61,05 € la pièce	WAGO	250V	DIN Rail	0.1 s → 300 min	Multifunction	1	Timer Relay	857	SPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
RS PRO Panel Mount Timer Relay, 100 → 125 V dc, 100 → 240V ac, 2-Contact, 0.1 s → 300h, DPDT N° de stock RS: 179-2915 Documentation technique: 80,10 € la pièce	RS PRO	100 → 125 V dc, 100 → 240V ac	Panel Mount	0.1 s → 300h	Flicker OFF Start, Flicker ON Start, Interval, ON Delay, Signal OFF Delay, Signal ON/OFF Delay	2	Multi Function	-	DPDT	Hours, Seconds	-	5A	-	125 V dc, 240V ac	DPDT	11-Pin Connector	100V ac/dc	48mm	-	-	48mm	52.3mm	-	-
Better World Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05 → 1s, N° de stock RS: 896-8692 Référence fabricant: RE22R1CMR Documentation technique: 60,12 € la pièce	Schneider Electric	24 → 240V ac/dc	DIN Rail	0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 10 → 100 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 30 → 300 h, 30 → 300 min, 30 → 300s	OFF Delay	1	Single	Harmony Time	SPDT	Hours, Minutes, Seconds	External	8A	-	240V ac/dc	SPCO	Screw	24V ac/dc	90mm	Yes	Green Premium	79.5mm	22.9mm	+60°C	10mA
Eaton Distribution Parts Series DIN Rail Mount Digital Timer, 230V ac, 1-Contact, 1-Function, SPST N° de stock RS: 253-139 Référence fabricant: 196845 SRSD1NOW Documentation technique: 188,00 € la pièce	Eaton	230V ac	DIN Rail	-	-	1	1	Eaton Distribution Parts	SPST	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 339B Series Surface Mount Time Delay Relay, 240V ac, 2-Contact, 0.3 s → 10 h, DPDT N° de stock RS: 286-795 Référence fabricant: 339B359T2X Documentation technique: 185,76 € la pièce	ATC	240V ac	Surface Mount	0.3 s → 10 h	Interval, ON Delay	2	Timer Relay	339B	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 175MD Series DIN Rail Mount Multi timer, 20 → 240V ac/dc, 1-Contact, 0 s → 99.0 h, SPDT N° de stock RS: 286-786 Référence fabricant: 175MD Documentation technique: 68,26 € la pièce	ATC	20 → 240V ac/dc	DIN Rail	0 s → 99.0 h	-	1	Multi Function	175MD	SPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 328E Series Surface Mount Multi timer, 24 → 240 V ac/dc, 24 V dc, 2-Contact, 1 s → 10 h, DPDT N° de stock RS: 286-789 Référence fabricant: 328E200F10XX Documentation technique: 279,60 € la pièce	ATC	24 → 240 V ac/dc, 24 V dc	Surface Mount	1 s → 10 h	Delayed Pulse, Interval, OFF Delay, ON Delay, Pause First, Pulse First, Pulse ON/OFF, Single Shot	2	Multi Function	328E	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 405C Series DIN Rail Mount Time Delay Relay, 20 → 240V ac, 2-Contact, 1 s → 50 h, 2-Function, DPDT N° de stock RS: 286-799 Référence fabricant: 405C100F1X Documentation technique: 297,38 € la pièce	ATC	20 → 240V ac	DIN Rail	1 s → 50 h	Interval, ON Delay	2	2	405C	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 405C Series DIN Rail Mount Time Delay Relay, 20 → 240V ac, 2-Contact, 1 s → 50 h, 2-Function, DPDT N° de stock RS: 286-802 Référence fabricant: 405C500F2X Documentation technique: 297,38 € la pièce	ATC	20 → 240V ac	DIN Rail	1 s → 50 h	Interval, ON Delay	2	2	405C	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 409B Series Surface Mount Timer Relay, 24 → 240 V ac/dc, 24 V dc, 2-Contact, 1 s → 50 h, 2-Function, N° de stock RS: 286-808 Référence fabricant: 409B500F2X Documentation technique: 393,40 € la pièce	ATC	24 → 240 V ac/dc, 24 V dc	Surface Mount	1 s → 50 h	Interval	2	2	409B	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 339B Series Surface Mount Time Delay Relay, 240V ac, 2-Contact, 0.3 s → 10 h, DPDT N° de stock RS: 286-794 Référence fabricant: 339B359R2X Documentation technique: 194,20 € la pièce	ATC	240V ac	Surface Mount	0.3 s → 10 h	Interval, ON Delay	2	Timer Relay	339B	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
ATC 339B Series Surface Mount Time Delay Relay, 240V ac, 2-Contact, 0.3 s → 10 h, DPDT N° de stock RS: 286-792 Référence fabricant: 339B200T2X Documentation technique: 185,76 € la pièce	ATC	240V ac	Surface Mount	0.3 s → 10 h	Interval, ON Delay	2	Timer Relay	339B	DPDT	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-