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. 161-7607
BrandRS PRO
$107.17
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min Asymmetrical Recycler with Pause Start, Asymmetrical Recycler with Pulse Start DIN Rail Multi Function 1 - Minutes, Seconds External - 8 A Screw 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2977
BrandRS PRO
$64.79
Each
units
24 V dc 0.1 → 1 s On-Delay Plug-In Mount Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 179-2936
BrandRS PRO
$60.80
Each
units
230 V ac 1 → 30 min On-Delay Plug-In Mount Single 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 896-6854
BrandRS PRO
$46.62
Each
units
24 → 240 V ac/dc 01. s → 999 h Multi Function DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8 A - 24 V ac/dc 240 V ac/dc
RS Stock No. 179-2962
BrandRS PRO
$67.78
Each
units
230 V ac 0.1 → 3 min On-Delay Plug-In Mount Single 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 161-7608
BrandRS PRO
$101.76
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min ON Delay, ON Pulse, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 2 - Minutes, Seconds External - 5 A Screw 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2945
BrandRS PRO
$60.80
Each
units
110 V ac 1 → 30 min On-Delay Plug-In Mount Single 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2970
BrandRS PRO
$67.78
Each
units
110 V ac 1 → 30 s On-Delay Plug-In Mount Single 4 - - - 4PDT 3 A - - 110 V ac
RS Stock No. 179-2908
BrandRS PRO
$264.17
Each
units
100 → 240 V ac 999.9 s Power On-Delay Plug In - 8 - - - SPDT 5 A - 100 V ac 240 V ac
RS Stock No. 179-2928
BrandRS PRO
$57.82
Each
units
230 V ac 0.2 → 5 s On-Delay Plug-In Mount Single 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 178-5022
BrandRS PRO
$111.44
Each
units
- - - - - - - - - - - - - -
RS Stock No. 179-2937
BrandRS PRO
$60.80
Each
units
110 V ac 0.1 → 1 s On-Delay Plug-In Mount Single 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2960
BrandRS PRO
$64.79
Each
units
230 V ac 1 → 30 s On-Delay Plug-In Mount Single 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 896-6857
BrandRS PRO
$79.24
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. 161-7613
BrandRS PRO
$106.43
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min Off Pulse, ON Pulse with Control Switch, ON Pulse without Control Switch, On-Off Pulse Plug In Multi Function 2 - Minutes, Seconds External - 5 A 11-Pin Connector 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2978
BrandRS PRO
$64.79
Each
units
24 V dc 0.2 → 5 s On-Delay Plug-In Mount Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 179-2900
BrandRS PRO
$264.17
Each
units
100 → 240 V ac 99 min 59 s Power On Delay Plug-In Mount Single 1 - - External SPDT 5 A - 100 V ac 240 V ac
RS Stock No. 178-3459
BrandRS PRO
$71.98
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Accumulative Delay on Signal, Cyclic OFF/ON, Cyclic ON/OFF, Impulse ON/OFF, Interval, Leading Edge Bi-stable, Leading Edge Impulse, On Delay, Signal OFF Delay, Signal OFF/ON, Signal ON Delay, Trailing Edge Impulse DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 16 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 161-7604
BrandRS PRO
$92.52
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min ON Delay, ON Pulse, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 1 - Minutes, Seconds External - 8 A Screw 10.5 V ac/dc 265 V ac/dc
RS Stock No. 102-6122
BrandRS PRO
$73.59
Each
units
12 → 230 V ac/dc - - DIN Rail Multi Function - - - - SPDT - Screw - -
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