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. 179-2979
BrandRS PRO
MYR171.16
Each
units
24 V dc 0.5 → 10 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 124-1077
BrandRS PRO
MYR394.75
Each
units
230 V ac - Multi function Panel Mount Multi Function - - Seconds - - - Screw - -
RS Stock No. 161-7609
BrandRS PRO
MYR287.36
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min Asymmetrical Recycler with Pause Start, Asymmetrical Recycler with Pulse Start, Delay Pulse, OFF Pulse, ON Delay, ON Pulse, ON Pulse with Control Switch, One Shot Asymmetrical with Control Switch, One Shot Asymmetrical without Control Switch, Release Delay, Release True OFF Delay, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start 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. 179-2954
BrandRS PRO
MYR171.16
Each
units
24 V dc 0.2 → 5 min On-Delay Plug In Single 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 178-5029
BrandRS PRO
MYR282.62
Each
units
12 → 240 V ac/dc 0.1 s → 10 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 4PDT 8 A Screw 12 V ac/dc -
RS Stock No. 179-2985
BrandRS PRO
MYR171.16
Each
units
24 V dc 0.5 → 10 min On-Delay Plug In Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 896-6863
BrandRS PRO
MYR237.73
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. 179-2920
BrandRS PRO
MYR260.68
Each
units
220 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 - - 220 V ac
RS Stock No. 102-6128
BrandRS PRO
MYR128.42
Each
units
12 → 230 V ac/dc - - DIN Rail Multi Function - - - - SPDT - Screw - -
RS Stock No. 179-2925
BrandRS PRO
MYR231.73
Each
units
110 V ac 0.1 s → 300 h On-Delay Panel Mount, Plug-In Mount Single 2 - - - 2 x SPDT 5 A - - 110 V ac
RS Stock No. 102-6122
BrandRS PRO
MYR156.53
Each
units
12 → 230 V ac/dc - - DIN Rail Multi Function - - - - SPDT - Screw - -
RS Stock No. 179-2904
BrandRS PRO
MYR689.69
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. 179-2941
BrandRS PRO
MYR160.62
Each
units
110 V ac 2 → 60 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2948
BrandRS PRO
MYR160.62
Each
units
24 V dc 0.2 → 5 s On-Delay Plug In Single 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 124-1078
BrandRS PRO
MYR428.97
Each
units
24 V ac/dc - Multi function Panel Mount Multi Function - - Seconds - - - Screw - -
RS Stock No. 179-2933
BrandRS PRO
MYR152.68
Each
units
230 V ac 0.1 → 3 min On-Delay Plug In Single 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 896-6838
BrandRS PRO
MYR161.95
Each
units
240 V ac 3 → 120 s Star Delta DIN Rail Single 2 - Seconds External SPNO 5 A Screw - 24 V ac/dc, 240 V ac
RS Stock No. 179-2981
BrandRS PRO
MYR171.16
Each
units
24 V dc 1 → 30 s On-Delay Plug In Single 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 161-7608
BrandRS PRO
MYR272.85
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. 896-6854
BrandRS PRO
MYR117.69
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
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