Timer Relays

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Timer Relays are a type of Control Relay with a time delay built in.


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 - for timer relays, however, 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 right kind of delay required for your application.


What are the types of Timer Relays that I can choose from?


The most common timing function of Time 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 particular types of the timer relays. That means to consider what should initiate the delay and whether the timing should start at the same time as the application as well as when the voltage is released.


Timer Relays are triggered/initiated by either:


  • Voltage being applied or

  • The closing or opening of a trigger signal

Trigger signals are either:


  • Control Switch ( Dry Contact) such as a limit switch, float switch or push button or

  • Voltage ( Power Trigger)

Where can I use Timer Relay?


Time 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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Description Price Supply Voltage Time Range Mode of Operation Mounting Type Number of Timer Functions Number of Contacts Series Time Increment Power Supply Contact Configuration Current Maximum Terminal Type Minimum Voltage Maximum Voltage
RS Stock No. 774-0308
Mfr. Part No.88827115
BrandCrouzet
MYR261.42
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 188-4613
Mfr. Part No.H3CR-H8L AC/DC24 M
BrandOmron
MYR478.32
Each
units
24 V ac/dc 0.05 → 12 min OFF Delay DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Minutes, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 834-7515
Mfr. Part No.3RP2005-1BW30
BrandSiemens
MYR631.20
Each
units
24 → 240 V 0.05 s → 100 h Additive ON Delay With Control Signal, OFF Delay with Control Signal, OFF Delay/Instantaneous With Control Signal, ON Delay, ON Delay/Instantaneous Contact, ON Delay/OFF Delay/Instantaneous With Control Signal, Passing Break Contact With Control Signal, Passing Break Contact/Instantaneous With Control Signal, Passing Make Contact, Passing Make Contact/Instantaneous Contact, Pulse-Shaping /Instantaneous With Control Signal DIN Rail Multi Function 2 - Hours, Minutes, Seconds External DPDT 1 A Screw - -
RS Stock No. 774-0317
Mfr. Part No.88827125
BrandCrouzet
MYR164.56
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Pulse Timer DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
MYR182.25
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 774-0314
Mfr. Part No.88827145
BrandCrouzet
MYR203.20
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Interval DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
MYR206.34
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h OFF Delay DIN Rail Single 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 296-2376
Mfr. Part No.ETR4-70-A
BrandEaton
MYR807.57
Each
units
24 → 240 V ac/dc 0.05 s → 60 h Flash, Fleeting, OFF Delay, ON Delay, Pulse Former, Pulse Generator DIN Rail Multi Function 2 ETR4 Hours, Seconds External DPDT 6 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 225-8267
Mfr. Part No.ETR4-11-A
BrandEaton
MYR434.90
Each
units
24 → 240 V ac/dc 0.05 s → 60 h ON Delay DIN Rail Single 1 ETR4 Hours, Seconds External SPDT 3 A Screw 24 V ac/dc 240 V dc, 400 V ac
RS Stock No. 774-0310
Mfr. Part No.88827135
BrandCrouzet
MYR221.64
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 349-1279
Mfr. Part No.H3CR-H8L AC100-120 M
BrandOmron
MYR453.73
Each
units
100 → 120 V ac 0.05 → 12 min OFF Delay DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Minutes, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 236-1385
Mfr. Part No.H3YN-4 DC24
BrandOmron
MYR255.69
Each
units
24 V dc 0.1 s → 10 min Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 4 H3YN Minutes, Seconds External - 3 A Socket - 250 V ac
RS Stock No. 831-6013
Mfr. Part No.3RP2511-2AW30
BrandSiemens
MYR229.90
Each
units
12 → 240 V ac/dc 0.5 → 10 s ON Delay - Single 1 - Seconds - SPDT - Cage Clamp 12 V ac/dc 240 V ac/dc
RS Stock No. 825-4549
Mfr. Part No.H3BA-N8H 110 VAC
BrandOmron
MYR390.46
Each
units
110 V ac 0.05 s → 300 h ON Delay Flush Mount, Panel Mount Single 1 H3BA Hours, Minutes, Seconds External SPDT 5 A PCB Pin 100 V ac 240 V ac
RS Stock No. 897-6738
Mfr. Part No.RE22R1QCMU
MYR246.28
Each
units
24 → 240 V ac/dc 0.05 → 300 s Star Delta DIN Rail Single 1 RE22 R1 Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 489-7173
Mfr. Part No.1SVR500110R0000
BrandABB
MYR269.06
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Seconds External SPDT 6 A Screw 12 V 250 V
RS Stock No. 896-6822
BrandRS PRO
MYR121.89
Each
units
24 V ac/dc, 240 V ac 0.3 s → 30 h OFF Delay DIN Rail Single 1 - Seconds External SPDT 5 A Screw - 24 V ac/dc, 240 V ac
RS Stock No. 124-9405
Mfr. Part No.3RP2525-1BB30
BrandSiemens
MYR372.65
Each
units
Maximum of 24 V ac/dc 0.05 s → 100 h ON-Delay DIN Rail Single 2 3RP25 Hours, Seconds External DPDT 3 A Screw - 24 V ac/dc
RS Stock No. 188-4578
Mfr. Part No.H3CR-F8 AC/DC24
BrandOmron
MYR494.20
Each
units
24 V ac/dc 0.05 s → 30 h Flicker OFF DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 733-4956
Mfr. Part No.H3DK-M1 AC/DC24-240
BrandOmron
MYR283.22
Each
units
24 → 240 V ac/dc 0.1 s → 1200 h Flicker OFF Start, Flicker ON Start, Interval, OFF Delay, ON Delay, ON/OFF Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5 A Screw 24 V 30 V dc, 250 V ac
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