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 Mounting Type Number of Timer Functions Number of Contacts Series Time Increment Power Supply Contact Configuration Current Maximum Terminal Type Minimum Voltage Maximum Voltage Contact Material
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. 185-097
Mfr. Part No.1SVR500110R0100 - CT-AHD.22
BrandABB
TWD3,926.00
Each
units
24 → 240 V ac, 24 → 48V dc 0.05 s → 100h DIN Rail Single 2 - Hours, Seconds External DPDT 6A - 12V 250V -
RS Stock No. 687-6109
Mfr. Part No.H5CX-L8-N
BrandOmron
TWD6,361.00
Each
units
100 → 240V ac 0.001 s → 9999h Panel Mount Multi Function 1 H5CX Hours, Seconds External - - - - - -
RS Stock No. 834-7473
Mfr. Part No.3RP1512-1AP30
BrandSiemens
TWD2,134.00
Each
units
200 → 240V 1.5 → 30s DIN Rail Single 1 - Seconds External SPDT 1A Screw - - -
RS Stock No. 849-445
Mfr. Part No.88857005
BrandCrouzet
TWD4,310.00
Each
units
24V ac/dc, 110 → 240 V ac 0.01 s → 9999h Panel Mount Multi Function 2 - Hours, Seconds External DPDT 8A - 110V ac 24 V dc, 240V ac -
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. 746-6971
Mfr. Part No.1SVR730010R3200 CT-MBS.22S
BrandABB
TWD3,573.00
Each
units
- - - - - - - - - - - - - -
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. 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. 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. 783-4005
Mfr. Part No.1SVR730180R3100
BrandABB
TWD3,451.00
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. 828-5173
Mfr. Part No.LEDK 12-230V AC/DC
TWD1,584.00
Each
units
12 → 230V ac/dc 0.1 s → 100h DIN Rail Single 2 - Hours, Minutes, Seconds External - 8A Screw 12V ac/dc 265V ac/dc -
RS Stock No. 305-6012
Mfr. Part No.81506720
BrandCrouzet
TWD5,527.00
Each
units
- 0.1 → 30s Panel Mount Multi Function - - Seconds - - - Screw - - -
RS Stock No. 185-491
Mfr. Part No.1SVR430261R6000
BrandABB
TWD2,707.00
Each
units
100 → 127V ac 0.05 s → 300h DIN Rail Single - - Hours, Seconds External - 4A Screw - 250V -
RS Stock No. 349-1285
Mfr. Part No.H3YN-2 AC100-120
BrandOmron
TWD1,664.00
Each
units
100 → 120V ac 0.1 s → 10min - Multi Function 2 H3YN Minutes, Seconds External - 5A Socket - 250V ac -
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. 746-6999
Mfr. Part No.1SVR730030R3300 CT-MXS.22S
BrandABB
TWD5,029.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 470-7929
Mfr. Part No.3RP2025-1AQ30
BrandSiemens
TWD3,222.00
Each
units
24V ac/dc, 100 → 127 V ac 0.05 → 100 h, 0.05 → 100 min, 0.05 → 100s DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT - Screw - 250V ac/dc -
RS Stock No. 225-8267
Mfr. Part No.031882 & ETR4-11-A
BrandEaton
TWD3,697.00
Each
units
24 → 240V ac/dc 0.05 s → 60h DIN Rail Single 1 ETR4 Hours, Seconds External SPDT 3A Screw 24V ac/dc 240 V dc, 400V ac -
RS Stock No. 467-6897
Mfr. Part No.88886106
BrandCrouzet
TWD2,278.00
Each
units
12 → 240 V dc, 24 → 240V ac 0.02 → 300 h, 0.02 → 300 min, 0.02 → 300s Plug In Single 2 - Hours, Minutes, Seconds External DPDT 5A - 12 V dc, 24V ac 240 V ac, 240V dc -