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. 896-8698
Mfr. Part No.RE22R2KMR
TWD3,884.00
Each
units
24 → 240V ac/dc 0.3 → 300s - DIN Rail Single 2 RE22 R2 Seconds External DPDT 5A Screw 24V ac/dc 240V ac/dc
RS Stock No. 329-238
Mfr. Part No.XW-S2
TWD2,148.00
Each
units
10.5 → 265V ac/dc 0.6 → 60 min, 0.6 → 60s - Plug In Multi Function 2 XW-S2 Minutes, Seconds External DPDT 8A 11-Pin Connector 10.5 V ac/dc, 24V dc 265V ac/dc
RS Stock No. 392-7188
Mfr. Part No.3RP1574-1NP30
BrandSiemens
TWD4,930.00
Each
units
200 → 240V 1 → 20s - - Single 2 - Seconds External SPDT - Screw - -
RS Stock No. 714-0023
Mfr. Part No.V0DDTS1
BrandGIC
TWD1,784.00
Each
units
24 → 240V ac/dc 0.1 s → 999h - DIN Rail Multi Function 1 - Hours, Seconds - SPDT - Screw 125V ac/dc 240 V ac, 250V dc
RS Stock No. 179-2904
BrandRS PRO
TWD3,649.00
Each
units
12 → 48V dc 999.9s - Plug In Single 1 - - External SPDT 5A - 12V dc 48V dc
RS Stock No. 714-0026
Mfr. Part No.V0DDTS
BrandGIC
TWD1,653.00
Each
units
24 → 240V ac/dc 0.1 s → 999h - DIN Rail Multi Function 1 - Hours, Seconds - SPDT 8A Screw 125V ac/dc 240 V ac, 250V dc
RS Stock No. 179-2905
BrandRS PRO
TWD3,649.00
Each
units
12 → 48V dc 99 min 59s - Plug In Single 1 - - External SPDT 5A - 12V dc 48V dc
RS Stock No. 714-0029
Mfr. Part No.V0DDTD
BrandGIC
TWD923.00
Each
units
24 → 240V ac/dc 0.1 s → 999h - DIN Rail Multi Function 1 - Hours, Seconds - SPDT 8A Screw 125V ac/dc 240 V ac, 250V dc
RS Stock No. 896-6844
BrandRS PRO
TWD2,270.00
Each
units
24 → 240V ac/dc 0.6 → 600s - DIN Rail Single 2 - Seconds External DPDT 5A Screw 24V ac/dc 240V ac/dc
RS Stock No. 812-7853
Mfr. Part No.S1DXM-M2C60M-DC24V
BrandPanasonic
TWD1,397.00
Each
units
24V dc 0.5 s → 60min - Panel Mount Multi Function 2 S1DXM Minutes, Seconds External - - Socket 19.2V dc 26.4V dc
RS Stock No. 774-0317
Mfr. Part No.88827125
BrandCrouzet
TWD1,971.00
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 433-3994
Mfr. Part No.88896203
BrandCrouzet
TWD2,870.00
Each
units
24V ac 0.1 s → 100h - DIN Rail Single 4 - Hours, Seconds External - 3A - - 24V ac
New
RS Stock No. 220-2643
Mfr. Part No.700-HT22AU120
TWD3,769.00
Each
units
120V ac - - - Single - - - - - - - - -
RS Stock No. 179-2914
BrandRS PRO
TWD3,649.00
Each
units
12 → 48V dc 99 h 59min - Plug In Single 1 - - External SPDT 5A - 12V dc 48V dc
RS Stock No. 684-3654
Mfr. Part No.2917382
TWD2,949.00
Each
units
19.2 → 30V dc 3 → 300s - DIN Rail Single 1 ETD-BL-1T-ON-300S Seconds External - 6.3A Screw - -
RS Stock No. 812-7857
Mfr. Part No.S1DXM-M2C10H-DC24V
BrandPanasonic
TWD1,491.00
Each
units
24V dc - - Panel Mount Multi Function 2 S1DXM Hours, Minutes External - - Socket 19.2V dc 26.4V dc
RS Stock No. 827-8488
Mfr. Part No.TDR782XBXA-24D
TWD1,705.00
Each
units
24V dc 100 ms → 100h - DIN Rail Single 2 - Hours, Milliseconds, Minutes, Seconds External DPDT 5A - - 24V dc
RS Stock No. 179-2906
BrandRS PRO
TWD3,649.00
Each
units
12 → 48V dc 99 h 59min - Plug In Single 1 - - External SPDT 5A - 12V dc 48V dc
New
RS Stock No. 220-2644
Mfr. Part No.700-HT22AU24
TWD3,769.00
Each
units
24V ac - - - Single - - - - - - - - -
RS Stock No. 177-0085
Mfr. Part No.H3CA-A-306 DIN
BrandOmron
TWD6,428.00
Each
units
12 → 240 V dc, 24 → 240V ac 0.1 s → 100h - DIN Rail Multi Function 2 H3CA Hours, Minutes, Seconds External SPDT 3A Screw 12 V dc, 24V ac 240V ac/dc