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. 179-2959
BrandRS PRO
kr 349,25
Each
Units
230 V ac 0.5 → 10 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 896-6857
BrandRS PRO
kr 494,91
Each
Units
24 → 240 V ac/dc 3 → 120 s Star Delta DIN Rail Single 2 - Seconds External SPNO 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 179-2929
BrandRS PRO
kr 311,66
Each
Units
230 V ac 0.5 → 10 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 179-2951
BrandRS PRO
kr 328,01
Each
Units
24 V dc 2 → 60 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 896-6872
BrandRS PRO
kr 993,91
Each
Units
110 → 240 V ac 01.s → 999 days Multi Function Panel Mount Multi Function 2 - Days, Hours, Minutes, Seconds External - 5 A PCB Pin 110 V ac 240 V ac
RS Stock No. 179-2970
BrandRS PRO
kr 365,70
Each
Units
110 V ac 1 → 30 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 110 V ac
RS Stock No. 179-2984
BrandRS PRO
kr 349,25
Each
Units
24 V dc 0.2 → 5 min On-Delay Plug In Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 179-2916
BrandRS PRO
kr 709,47
Each
Units
12 → 48 V dc, 24 → 48 V ac 0.1 s → 300 h B: ON-Delay, C: Signal ON/OFF Delay, D: Signal OFF Delay, E: Interval, F: Flicker ON Start, R: Flicker OFF Start Panel Mount, Plug-In Mount Multi Function 2 - - - DPDT 5 A - 12 V dc, 24 V ac 48 V ac/dc
RS Stock No. 179-2981
BrandRS PRO
kr 349,25
Each
Units
24 V dc 1 → 30 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 178-5021
BrandRS PRO
kr 587,23
Each
Units
12 → 240 V ac/dc 0.1 s → 100 days On Delay, Interval, Off Delay, Single Shot, Delayed Pulse, Pause First, Pulse First, Pulse On/Off Plug In 8 - - Days, Hours, Minutes, Seconds External DPDT 8 A 11-Pin Connector 12 V ac/dc -
RS Stock No. 896-6844
BrandRS PRO
kr 667,59
Each
Units
24 → 240 V ac/dc 0.6 → 600 s True Off Delay DIN Rail Single 2 - Seconds External DPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 179-2904
BrandRS PRO
kr 1 425,11
Each
Units
12 → 48 V dc 999.9 s Power On Delay Plug In Single 1 - - External SPDT 5 A - 12 V dc 48 V dc
RS Stock No. 179-2939
BrandRS PRO
kr 328,01
Each
Units
110 V ac 0.5 → 10 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2943
BrandRS PRO
kr 328,01
Each
Units
110 V ac 0.2 → 5 min On-Delay Plug In Single 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 808-6623
BrandRS PRO
kr 845,76
Each
Units
24 V ac/dc - One Shot Panel Mount Single 1 - Hours, Minutes, Seconds External SPDT 50 mA - - 24 V ac/dc
RS Stock No. 179-2962
BrandRS PRO
kr 365,70
Each
Units
230 V ac 0.1 → 3 min On-Delay Plug In Single 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 179-2909
BrandRS PRO
kr 1 425,11
Each
Units
100 → 240 V ac 99.9 ms Power On-Delay Plug In - 8 - - - SPDT 5 A - 100 V ac 240 V ac
RS Stock No. 179-2966
BrandRS PRO
kr 365,70
Each
Units
110 V ac 0.1 → 1 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 110 V ac
RS Stock No. 179-2957
BrandRS PRO
kr 349,25
Each
Units
230 V ac 0.1 → 1 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 179-2927
BrandRS PRO
kr 311,66
Each
Units
230 V ac 0.1 → 1 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 230 V ac
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