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. 179-2932
BrandRS PRO
MYR151.00
Each
units
230 V ac 2 → 60 s On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 124-1077
BrandRS PRO
MYR340.49
Each
units
230 V ac - Multi function Panel Mount - - - Seconds - - - Screw - -
RS Stock No. 179-2905
BrandRS PRO
MYR689.69
Each
units
12 48 V dc 99 min 59 s Power On Delay Plug-In Mount 1 1 - - External SPDT 5 A - 12 V dc 48 V dc
RS Stock No. 179-2908
BrandRS PRO
MYR689.69
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. 102-6125
BrandRS PRO
MYR189.77
Each
units
12 230 V ac/dc - ON Delay DIN Rail - - - - - DPDT - Screw - -
RS Stock No. 179-2942
BrandRS PRO
MYR158.72
Each
units
110 V ac 0.1 → 3 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2945
BrandRS PRO
MYR158.72
Each
units
110 V ac 1 → 30 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2972
BrandRS PRO
MYR176.95
Each
units
110 V ac 0.1 → 3 min On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 110 V ac
RS Stock No. 179-2953
BrandRS PRO
MYR158.72
Each
units
24 V dc 0.1 → 3 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 161-7608
BrandRS PRO
MYR297.39
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. 179-2955
BrandRS PRO
MYR169.13
Each
units
24 V dc 0.5 → 10 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 798-3444
BrandRS PRO
MYR204.62
Each
units
230 V ac - Interval Clamp Single 1 - Hours, Minutes, Seconds External NC, SPNO - - - 230 V ac
RS Stock No. 179-2969
BrandRS PRO
MYR176.95
Each
units
110 V ac 0.5 → 10 s On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 110 V ac
RS Stock No. 102-6123
BrandRS PRO
MYR156.80
Each
units
12 230 V ac/dc - - DIN Rail - - - - - DPDT - Screw - -
RS Stock No. 896-6863
BrandRS PRO
MYR212.06
Each
units
24 240 V ac/dc 01. s 999 h Multi Function DIN Rail 18 1 - Hours, Minutes, Seconds External SPDT 8 A - 24 V ac/dc 240 V ac/dc
RS Stock No. 161-7607
BrandRS PRO
MYR311.07
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. 179-2913
BrandRS PRO
MYR689.69
Each
units
12 48 V dc 99 min 59 s Power On Delay Plug-In Mount 1 1 - - External SPDT 5 A - 12 V dc 48 V dc
RS Stock No. 178-5028
BrandRS PRO
MYR334.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 179-2916
BrandRS PRO
MYR343.61
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 6 2 - - - DPDT 5 A - 12 V dc, 24 V ac 48 V ac/dc
RS Stock No. 179-2958
BrandRS PRO
MYR169.13
Each
units
230 V ac 0.2 → 5 s On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 230 V ac
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