Timer Relays

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 Mounting Type Time Range Number of Contacts Number of Timer Functions Mode of Operation Series Contact Configuration Time Increment Power Supply Maximum Voltage Current Maximum Terminal Type Minimum Voltage
RS Stock No. 896-6829
BrandRS PRO
£25.87
Each
Units
24 V ac/dc, 110V ac DIN Rail 0.3 s → 30h 1 Single OFF Delay - SPDT Seconds External 24 V ac/dc, 110V ac 5A Screw -
RS Stock No. 896-6822
BrandRS PRO
£25.15
Each
Units
24 V ac/dc, 240V ac DIN Rail 0.3 s → 30h 1 Single OFF Delay - SPDT Seconds External 24 V ac/dc, 240V ac 5A Screw -
RS Stock No. 896-6810
BrandRS PRO
£23.10
Each
Units
24 V ac/dc, 240V ac DIN Rail 0.3 s → 30h 1 Single ON Delay - SPDT Seconds External 24 V ac/dc, 240V ac 5A Screw -
RS Stock No. 536-2555
BrandRS PRO
£29.94
Each
Units
- Panel Mount 0 → 30min - - - - - - External - - - -
RS Stock No. 808-6620
BrandRS PRO
£59.38
Each
Units
230V ac Panel Mount - 1 Single One Shot - SPDT Minutes, Seconds External 230V ac - - -
RS Stock No. 536-2779
BrandRS PRO
£30.17
Each
Units
250V ac Panel Mount 0 → 120min - - - - - - External - - - -
RS Stock No. 896-6813
BrandRS PRO
£29.97
Each
Units
12 → 240V ac/dc DIN Rail 0.1 s → 100h 1 Multi Function Multi Function - SPDT Hours, Minutes, Seconds External 240V ac/dc 6A Screw 12V ac/dc
RS Stock No. 896-6816
BrandRS PRO
£23.89
Each
Units
24 V ac/dc, 110V ac DIN Rail 0.3 s → 30h 1 Single ON Delay - SPDT Seconds External 24 V ac/dc, 110V ac 5A Screw -
RS Stock No. 896-6826
BrandRS PRO
£38.42
Each
Units
12 → 240V ac/dc DIN Rail 0.1 s → 100h 1 Multi Function Asymmetric OFF/ON, Asymmetric ON/OFF - SPDT Hours, Minutes, Seconds External 240V ac/dc 8A Screw 12V ac/dc
RS Stock No. 896-6844
BrandRS PRO
£53.40
Each
Units
24 → 240V ac/dc DIN Rail 0.6 → 600s 2 Single - - DPDT Seconds External 240V ac/dc 5A Screw 24V ac/dc
RS Stock No. 896-6832
BrandRS PRO
£33.21
Each
Units
240 → 415V ac DIN Rail 3 → 120s 2 Single Star Delta - - Seconds External 415V ac 5A Screw 240V ac
RS Stock No. 808-6623
BrandRS PRO
£65.91
Each
Units
24V ac/dc Panel Mount - 1 Single One Shot - SPDT Hours, Minutes, Seconds External 24V ac/dc - - -
RS Stock No. 896-6848
BrandRS PRO
£40.78
Each
Units
24 → 240V ac/dc DIN Rail 0.1 s → 10h 2 Multi Function ON Delay - DPDT Seconds External 240V ac/dc 5A Screw 24V ac/dc
RS Stock No. 798-3444
BrandRS PRO
£35.95
Each
Units
230V ac - - 1 Single Interval - - Hours, Minutes, Seconds External 230V ac - - -
RS Stock No. 896-6863
BrandRS PRO
£43.75
Each
Units
24 → 240V ac/dc DIN Rail 01. s → 999h 1 Multi Function Multi Function - SPDT Hours, Minutes, Seconds External 240V ac/dc 8A - 24V ac/dc
RS Stock No. 102-6122
BrandRS PRO
£27.31
Each
Units
12 → 230V ac/dc DIN Rail - - Multi Function - - SPDT - - - - Screw -
RS Stock No. 896-6872
BrandRS PRO
£85.98
Each
Units
110 → 240V ac Panel Mount - 2 Multi Function Multi Function - - Days, Hours, Minutes, Seconds External 240V ac 5A PCB Pin 110V ac
RS Stock No. 896-6857
BrandRS PRO
£41.14
Each
Units
24 → 240V ac/dc DIN Rail 3 → 120s 2 Single Star Delta - SPNO Seconds External 240V ac/dc 5A Screw 24V ac/dc
RS Stock No. 896-6838
BrandRS PRO
£29.82
Each
Units
240V ac DIN Rail 3 → 120s 2 Single Star Delta - SPNO Seconds External 24 V ac/dc, 240V ac 5A Screw -
RS Stock No. 124-1078
BrandRS PRO
£73.48
Each
Units
24V ac/dc Panel Mount - - Multi Function - - - Seconds - - - Screw -