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. 225-8318
Mfr. Part No.031891 & ETR4-69-A
BrandEaton
TWD5,522.00
Each
units
24 → 240V ac/dc 0.05s → 100h - DIN Rail Multi Function 1 ETR4 Hours, Seconds External SPDT 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. 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
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. 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. 446-0327
Mfr. Part No.80.01.0.240.0000
BrandFinder
TWD2,412.00
Each
units
12 → 240V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24h - DIN Rail Multi Function 1 80 Series Hours, Minutes, Seconds External SPDT 16A Screw 250V ac 400V ac
RS Stock No. 106-6272
Mfr. Part No.H3RN-1-B DC24
BrandOmron
TWD1,899.00
Each
units
24V dc 0.1 s → 10min - Panel Mount Multi Function 2 H3RN Minutes, Seconds External SPDT 3A Plug In - 250V ac
RS Stock No. 818-4579
Mfr. Part No.2AADT5
BrandGIC
TWD2,043.00
Each
units
24 → 240V ac/dc - - DIN Rail Multi Function 2 - - External DPDT 5A Screw 24V ac/dc 240V ac/dc
RS Stock No. 828-5186
Mfr. Part No.LEDF 24VAC/DC/110VAC. 0.5-10 Sec
TWD1,797.00
Each
units
24V ac/dc, 110 V ac 0.5 → 10s - DIN Rail Single 1 - Seconds External SPDT 8A Screw - -
RS Stock No. 442-9168
Mfr. Part No.1SVR550019R0000
BrandABB
TWD2,635.00
Each
units
24 → 240V ac/dc 0.1 → 300s - DIN Rail Multi Function - - Seconds External - - - - -
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. 329-137
Mfr. Part No.XM-S1
TWD1,806.00
Each
units
10.5 → 265V ac/dc 0.6 → 60min - Plug In Multi Function 1 XM-S1 Minutes External SPDT 8A 11-Pin Connector 10.5 V ac/dc, 24V dc 265V ac/dc
RS Stock No. 746-7043
Mfr. Part No.1SVR740020R0200 CT-MVS.21P
BrandABB
TWD5,178.00
Each
units
24 → 240V ac/dc 0.05 s → 300h - DIN Rail Multi Function 2 - Hours, Seconds External DPDT 4A Push In 12V 300V ac
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. 828-5161
Mfr. Part No.LESW 12-230V AC/DC
TWD1,224.00
Each
units
12 → 230V ac/dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw 12V ac/dc 265V ac/dc
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. 746-7097
Mfr. Part No.1SVR740211R2300 CT-SDS.23P
BrandABB
TWD3,574.00
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. 746-6999
Mfr. Part No.1SVR730030R3300 CT-MXS.22S
BrandABB
TWD5,029.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 296-2376
Mfr. Part No.031888 & ETR4-70-A
BrandEaton
TWD8,545.00
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