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. 827-3436
Mfr. Part No.RUW101MW
TWD1,564.00
Each
units
- - Multi Function Plug In Multi Function - - - - - - - 24 V ac/dc 240 V ac/dc
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
TWD3,306.00
Each
units
12 240 V ac/dc 0.1 s 100 h Multi Function with NFC DIN Rail Multi Function 2 Zelio Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 872-5811
Mfr. Part No.RE22R2MMW
TWD2,833.00
Each
units
12 240 V ac/dc 0.1 s 100 h Multi Function DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw - 250 V
RS Stock No. 896-8698
Mfr. Part No.RE22R2KMR
TWD3,606.00
Each
units
24 240 V ac/dc 0.3 300 s OFF Delay DIN Rail Single 2 RE22 R2 Seconds External DPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 791-2720
Mfr. Part No.RE17RBMU
TWD1,278.00
Each
units
24 240 V ac, 24 V dc 0.1 s 100 h One Shot DIN Rail Single 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 897-6712
Mfr. Part No.RE22R1AKMR
TWD2,914.00
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 OFF Delay, ON Delay DIN Rail Multi Function 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
TWD1,178.00
Each
units
24 240 V ac, 24 V dc 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. 134-5388
Mfr. Part No.XB5DTB24
TWD2,915.00
Each
units
24 V dc 0.5 → 10 min - Panel Mount Single - Harmony XB5 - External - 10 A Screw - 24 V dc
RS Stock No. 827-8488
Mfr. Part No.TDR782XBXA-24D
TWD1,100.00
Each
units
24 V dc 100 ms → 100 h ON Delay DIN Rail Single 2 - Hours, Milliseconds, Minutes, Seconds External DPDT 5 A Flat Pin - 24 V dc
RS Stock No. 791-2736
Mfr. Part No.RE17RLJU
TWD2,147.00
Each
units
12 V ac/dc 0.1 s → 100 h Asymmetrical DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw - 12 V ac/dc
RS Stock No. 896-8673
Mfr. Part No.RE22R1AMR
TWD2,290.00
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 ON Delay 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. 897-6716
Mfr. Part No.RE22R1MAMR
TWD2,914.00
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 ON Delay 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. 914-8227
Mfr. Part No.REXL4TMP7
TWD1,800.00
Each
units
230 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 4 - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 896-8670
Mfr. Part No.RE22R1HMR
TWD2,361.00
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 Interval Delay 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. 814-8447
Mfr. Part No.821TD10H-UNI
TWD1,640.00
Each
units
12 240 V ac/dc 0.1 s 10 Day Interval DIN Rail Multi Function 3 - Days, Hours, Minutes, Seconds Internal SPDT 15 A PCB Pin 12 V ac/dc 240 V ac/dc
RS Stock No. 872-5817
Mfr. Part No.RE22R2MMU
TWD2,662.00
Each
units
24 240 V ac 0.1 s 100 h Multi Function DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw - -
RS Stock No. 791-2727
Mfr. Part No.RE17RHMU
TWD1,240.00
Each
units
24 240 V ac, 24 V dc 0.1 s 100 h ON Pulse DIN Rail Multi Function 1 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 791-2739
Mfr. Part No.RE17RLMU
TWD1,860.00
Each
units
24 240 V ac, 24 V dc 0.1 s 100 h Asymmetrical 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. 872-5805
Mfr. Part No.RE22R2AMU
TWD2,275.00
Each
units
24 240 V ac, 24 V dc 0.1 s 100 h ON Delay DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw - -
RS Stock No. 791-2714
Mfr. Part No.RE17LLBM
TWD1,932.00
Each
units
24 240 V ac 0.1 s 100 h Asymmetrical DIN Rail Multi Function - RE17 Hours, Minutes, Seconds - - 0.7 A Screw 24 V ac 240 V ac