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. 783-4005
Mfr. Part No.1SVR730180R3100
BrandABB
TWD3,463.00
Each
units
- 0.05 s → 300h - DIN Rail Single 1 - Hours, Seconds - SPDT - Screw 24V ac/dc 48 V dc, 240V ac
RS Stock No. 877-8105
Mfr. Part No.2901484
TWD2,424.00
Each
units
- 3 → 300min - DIN Rail Single 2 ETD-BL-1T-ON-CC-300MIN-PT Minutes External SPDT - Screw 19.2V dc 30V dc
RS Stock No. 828-5177
Mfr. Part No.LRTM/2 12-230V AC/DC
TWD2,323.00
Each
units
12 → 230V ac/dc 0.1 s → 100h - DIN Rail Dual Function 2 - Hours, Minutes, Seconds External DPDT 8A Screw 12V ac/dc 265V ac/dc
RS Stock No. 746-6971
Mfr. Part No.1SVR730010R3200 CT-MBS.22S
BrandABB
TWD4,392.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 349-1291
Mfr. Part No.H3YN-21 AC100-120
BrandOmron
TWD3,011.00
Each
units
100 → 120V ac 0.1 min → 10h - - Multi Function 2 H3YN Hours, Minutes External - 5A Socket - 250V ac
RS Stock No. 872-5811
Mfr. Part No.RE22R2MMW
TWD3,311.00
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8A Screw - 250V
RS Stock No. 746-7090
Mfr. Part No.1SVR730180R3100 CT-APS.12S
BrandABB
TWD3,285.00
Each
units
24 → 240 V ac, 24 → 48V dc 0.05 s → 300h - DIN Rail Single 1 - Hours, Seconds External SPDT 4A Push In 12V 300V ac
RS Stock No. 349-1279
Mfr. Part No.H3CR-H8L AC100-120 M
BrandOmron
TWD3,391.00
Each
units
100 → 120V ac 0.05 → 12min - - Single 2 H3CR Minutes, Seconds External - 5A - - 30 V dc, 250V ac
RS Stock No. 687-6109
Mfr. Part No.H5CX-L8-N
BrandOmron
TWD6,384.00
Each
units
100 → 240V ac 0.001 s → 9999h - Panel Mount Multi Function 1 H5CX Hours, Seconds External - - - - -
RS Stock No. 828-5170
Mfr. Part No.LEYD/A 12-230V AC/DC
TWD1,432.00
Each
units
12 → 230V ac/dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 6A Screw 12V ac/dc 265V ac/dc
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
TWD3,514.00
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 2 Zelio Hours, Minutes, Seconds External DPDT 8A Screw 12V ac/dc 240V ac/dc
RS Stock No. 296-2376
Mfr. Part No.031888 & ETR4-70-A
BrandEaton
TWD8,818.00
Each
units
24 → 240V ac/dc 0.05 s → 60h - DIN Rail Multi Function 2 ETR4 Hours, Seconds External DPDT 6A Screw 12V ac/dc 240V ac/dc
RS Stock No. 467-6869
Mfr. Part No.88886016
BrandCrouzet
TWD2,644.00
Each
units
12 → 240 V dc, 24 → 240V ac 0.02 → 300 h, 0.02 → 300 min, 0.02 → 300s - Plug In Multi Function 2 - Hours, Minutes, Seconds External DPDT 5A 11-Pin Connector 12 V dc, 24V ac 240V ac/dc
RS Stock No. 798-3444
BrandRS PRO
TWD1,625.00
Each
units
230V ac - - - Single 1 - Hours, Minutes, Seconds External - - - - 230V ac
RS Stock No. 812-7964
Mfr. Part No.S1DX-A2C60S-AC120V
BrandPanasonic
TWD1,982.00
Each
units
120V ac 60s - Panel Mount Single 2 - Seconds External - - Socket 80V ac 132V ac
RS Stock No. 225-8295
Mfr. Part No.031884 & ETR4-51-A
BrandEaton
TWD3,247.00
Each
units
24 → 240V ac/dc 3 → 60s - DIN Rail Single 2 ETR4 Seconds External SPNO 3A Screw 24V ac/dc 240 V dc, 400V ac
RS Stock No. 774-0301
Mfr. Part No.88827103
BrandCrouzet
TWD2,251.00
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 340-4887
Mfr. Part No.B1MFT 24VAC/DC/230VAC 2-60 MI
TWD1,563.00
Each
units
24 V ac/dc, 230V ac 0.25 → 60 min, 0.5 → 60s - Plug In Multi Function 2 - Minutes, Seconds External DPDT 8A - - 25 V dc, 250V ac
RS Stock No. 746-7097
Mfr. Part No.1SVR740211R2300 CT-SDS.23P
BrandABB
TWD3,587.00
Each
units
380 → 440V ac 0.05 s → 10min - DIN Rail Single 2 - Minutes, Seconds External DPNO 4A Push In 12V 300V ac
RS Stock No. 687-6106
Mfr. Part No.H5CX-AD-N
BrandOmron
TWD7,230.00
Each
units
12 → 24V ac/dc 0.001 s → 9999h - Panel Mount Multi Function 1 H5CX Hours, Seconds External - - Screw - -