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. 774-0314
Mfr. Part No.88827145
BrandCrouzet
MYR253.55
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. 774-0308
Mfr. Part No.88827115
BrandCrouzet
MYR300.93
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
MYR528.09
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. 446-0327
Mfr. Part No.80.01.0.240.0000
BrandFinder
MYR332.51
Each
units
12 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h Interval, Interval with Control Signal ON, OFF Delay with Control Signal, ON & OFF Delay with Control Signal, ON Delay, Symmetrical Flash (Starting Pulse ON) DIN Rail Multi Function 1 80 Series Hours, Minutes, Seconds External SPDT 16A Screw 250 V ac 400 V ac
RS Stock No. 296-2376
Mfr. Part No.031888 & ETR4-70-A
BrandEaton
MYR880.90
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. 774-0310
Mfr. Part No.88827135
BrandCrouzet
MYR327.72
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. 791-2711
Mfr. Part No.RE17RAMU
MYR225.87
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. 831-6013
Mfr. Part No.3RP2511-2AW30
BrandSiemens
MYR395.91
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. 236-1385
Mfr. Part No.H3YN-4 DC24
BrandOmron
MYR276.56
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. 897-6722
Mfr. Part No.RE22R1MLMR
MYR428.81
Each
units
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s Asymmetrical DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 896-6829
BrandRS PRO
MYR108.27
Each
units
24 V ac/dc, 110 V ac 0.3 s → 30 h OFF Delay DIN Rail Single 1 - Seconds External SPDT 5 A Screw - 24 V ac/dc, 110 V ac
RS Stock No. 825-4549
Mfr. Part No.H3BA-N8H 110 VAC
BrandOmron
MYR549.20
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. 225-8318
Mfr. Part No.031891 & ETR4-69-A
BrandEaton
MYR811.97
Each
units
24 → 240 V ac/dc 0.05s → 100h Flash, Fleeting, OFF Delay, ON Delay, Pulse Former, Pulse Generator DIN Rail Multi Function 1 ETR4 Hours, Seconds External SPDT 3 A Screw 24 V ac/dc 240 V dc, 400 V ac
RS Stock No. 687-6096
Mfr. Part No.H5CX-A11-N
BrandOmron
MYR1,121.40
Each
units
100 → 240 V ac 0.001 s → 9999 h Cumulative, Interval, ON/OFF Duty Adjustable Flicker, Power ON Delay I, Power ON Delay II Repeat Cycle I, Repeat Cycle II, Signal OFF Delay, Signal ON Delay I, Signal ON Delay II, Stopwatch Panel Mount Multi Function 1 H5CX Hours, Seconds External - - 11-Pin Connector - -
RS Stock No. 687-6121
Mfr. Part No.H5CX-A11S-N
BrandOmron
MYR1,121.40
Each
units
100 → 240 V ac 0.001 s to 9999 h Cumulative, Interval, ON/OFF Duty Adjustable Flicker, Power ON Delay I, Power ON Delay II Repeat Cycle I, Repeat Cycle II, Signal OFF Delay, Signal ON Delay I, Signal ON Delay II, Stopwatch Panel Mount Multi Function 1 H5CX Hours, Seconds External Transistor Output - 11-Pin Connector - -
RS Stock No. 733-4959
Mfr. Part No.H3DK-M2 AC/DC24-240
BrandOmron
MYR409.22
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 - - 5 A - - 30 V dc, 250 V ac
RS Stock No. 825-4545
Mfr. Part No.H3BA-N 110 VAC
BrandOmron
MYR418.93
Each
units
110 V ac 0.05 s → 300 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, Signal OFF Delay, Signal ON/OFF Delay Flush Mount, Panel Mount Multi Function 2 H3BA Hours, Minutes, Seconds External DPDT 5 A PCB Pin 100 V ac 240 V ac
RS Stock No. 188-4578
Mfr. Part No.H3CR-F8 AC/DC24
BrandOmron
MYR593.31
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. 687-6115
Mfr. Part No.H5CX-A11SD-N
BrandOmron
MYR1,121.40
Each
units
12 → 24 V ac/dc 0.001 s → 9999 h Cumulative, Interval, ON/OFF Duty Adjustable Flicker, Power ON Delay I, Power ON Delay II Repeat Cycle I, Repeat Cycle II, Signal OFF Delay, Signal ON Delay I, Signal ON Delay II, Stopwatch Panel Mount Multi Function 1 H5CX Hours, Seconds External SPST - 11-Pin Connector - -
RS Stock No. 536-2555
BrandRS PRO
MYR194.34
Each
units
250 V ac 0 → 30 min - Panel Mount - - - - External - - - - -