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
TWD2,165.00
Each
units
- - Multi Function Plug In Multi Function - - - - - - - 24 V ac/dc 240 V ac/dc
RS Stock No. 872-5811
Mfr. Part No.RE22R2MMW
TWD2,968.00
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. 914-5070
Mfr. Part No.RENF22R2MMW
TWD3,463.00
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. 896-8698
Mfr. Part No.RE22R2KMR
TWD3,777.00
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. 896-8695
Mfr. Part No.RE22R1KMR
TWD2,908.00
Each
units
24 → 240 V ac/dc 0.3 → 300 s OFF Delay DIN Rail Single 1 RE22 R1 Seconds External SPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 134-5387
Mfr. Part No.XB5DTB23
TWD2,698.00
Each
units
24 V dc 3 → 60 s - Panel Mount Single - Harmony XB5 - External - 10 A Screw - 24 V dc
RS Stock No. 914-8211
Mfr. Part No.REXL4TMBD
TWD1,603.00
Each
units
24 V dc 0.1 s → 100 h - Plug In Multi Function - - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 791-2745
Mfr. Part No.RE17RMMU
TWD1,755.00
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h - DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw - 24 V dc, 240 V ac
RS Stock No. 134-5391
Mfr. Part No.XB5DTGM3
TWD3,498.00
Each
units
110 → 230 V ac/dc 3 → 60 s - Panel Mount Single - Harmony XB5 - External - 10 A Screw 110 V ac/dc 230 V ac/dc
RS Stock No. 134-5393
Mfr. Part No.XB5DTGM5
TWD3,568.00
Each
units
110 → 230 V ac/dc 3 → 60 min - Panel Mount Single - Harmony XB5 - External - 10 A Screw 110 V ac/dc 230 V ac/dc
RS Stock No. 897-6725
Mfr. Part No.RE22R2MYMR
TWD2,690.00
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 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 914-8198
Mfr. Part No.REXL2TMB7
TWD2,068.00
Each
units
24 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 897-6740
Mfr. Part No.RE22R2QEMR
TWD2,024.00
Each
units
24 → 240 V ac/dc 0.3 → 30 s Star Delta DIN Rail Single 2 RE22 R2 Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 134-5388
Mfr. Part No.XB5DTB24
TWD2,698.00
Each
units
24 V dc 0.5 → 10 min - Panel Mount Single - Harmony XB5 - External - 10 A Screw - 24 V dc
RS Stock No. 914-8233
Mfr. Part No.RE48AMH13MW
TWD2,829.00
Each
units
24 → 240 V ac/dc 0.02 s → 300 h Interval, Power On Delay Panel Mount Multi Function 2 - Hours, Minutes, Seconds External DPDT 5 A Plug In 24 V ac/dc 240 V ac/dc
RS Stock No. 872-5801
Mfr. Part No.RE22R1QMU
TWD1,799.00
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Star Delta DIN Rail Single 2 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 914-8215
Mfr. Part No.REXL4TMF7
TWD1,891.00
Each
units
110 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 4 - Hours, Minutes, Seconds - - 3 A - - -
RS Stock No. 897-6719
Mfr. Part No.RE22R2MWMR
TWD3,687.00
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 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 791-2749
Mfr. Part No.RE17RMMW
TWD1,755.00
Each
units
12 → 240 V ac/dc 0.1 s → 100 h - DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 914-8227
Mfr. Part No.REXL4TMP7
TWD1,414.00
Each
units
230 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 4 - Hours, Minutes, Seconds - - 5 A - - -