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. 221-086
Mfr. Part No.80.11.0.240.0000
BrandFinder
TWD2,403.00
Each
units
24 → 240V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24h DIN Rail Single 1 80 Series Hours, Minutes, Seconds External SPDT 16A Screw 16.8V ac/dc 265V ac/dc Silver Cadmium Oxide
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
TWD1,443.00
Each
units
24 to 230 V ac/12 to 230V dc 0.1 s → 100h DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw 24 Vac / 12V dc 265V ac/dc -
RS Stock No. 733-4953
Mfr. Part No.H3DK-S1 AC/DC24-240
BrandOmron
TWD3,126.00
Each
units
24 → 240V ac/dc 0.1 s → 1200h DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5A Screw 24V 30 V dc, 250V ac -
RS Stock No. 684-3689
Mfr. Part No.2917463
TWD2,808.00
Each
units
19.2 → 30V dc 3 → 300s DIN Rail Single 1 ETD-BL-1T-OFF-CC-300S Seconds External - 6.3A Screw - - -
RS Stock No. 687-6092
Mfr. Part No.H5CX-A-N
BrandOmron
TWD7,589.00
Each
units
100 → 240V ac 0.001 s → 9999h Panel Mount Multi Function 1 H5CX Hours, Seconds External - - Screw - - -
RS Stock No. 914-4597
Mfr. Part No.LEDO/2 12-230V AC/DC
TWD1,145.00
Each
units
12 → 230V ac/dc 0.1 s → 100h DIN Rail - 2 - Hours, Minutes, Seconds External DPDT 8A Screw 12V ac/dc 230V ac/dc -
RS Stock No. 827-3436
Mfr. Part No.RUW101MW
TWD2,166.00
Each
units
- - Plug In Multi Function - - - - - - - 24V ac/dc 240V ac/dc -
RS Stock No. 828-5151
Mfr. Part No.LMMT/2 12-230V AC/DC
TWD1,568.00
Each
units
24 to 230 V ac/12 to 230V dc 0.1 s → 100h DIN Rail Multi Function 2 - Hours, Minutes, Seconds External DPDT 8A Screw 24 Vac / 12V dc 265V ac/dc -
RS Stock No. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
TWD1,317.00
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. 456-0310
Mfr. Part No.1SBN020010R1001 TE5S-24
BrandABB
TWD2,793.00
Each
units
24V ac/dc 0.8 → 8 s, 6 → 60s DIN Rail Single - - Seconds External - 5A Screw 24V ac 240V ac -
RS Stock No. 828-5164
Mfr. Part No.LART 12-230V AC/DC
TWD1,120.00
Each
units
24 to 230 V ac/12 to 230V dc 0.1 s → 100h DIN Rail Dual Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw 24 Vac / 12V dc 265V ac/dc -
RS Stock No. 308-0784
Mfr. Part No.XMW-D1
TWD2,232.00
Each
units
10.5 → 265V ac/dc 0 → 60 min, 0 → 60s DIN Rail Multi Function 1 XMW-D1 Seconds External SPDT 8A Screw 10.5 V ac/dc, 24V dc 265V ac/dc Silver Nickel
RS Stock No. 733-4956
Mfr. Part No.H3DK-M1 AC/DC24-240
BrandOmron
TWD2,334.00
Each
units
24 → 240V ac/dc 0.1 s → 1200h DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5A Screw 24V 30 V dc, 250V ac -
RS Stock No. 857-7094
Mfr. Part No.DAA51CM24
TWD2,409.00
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h DIN Rail Single 2 - Hours, Minutes, Seconds External SPDT 5A Screw - - Silver Tin Oxide
RS Stock No. 392-7223
Mfr. Part No.3RP1505-1BP30
BrandSiemens
TWD7,076.00
Each
units
24 V ac, 24V dc, 200 → 240 V ac 0.5 → 10s - Multi Function - - Seconds External DPDT - Screw - - -
RS Stock No. 746-5110
Mfr. Part No.3RP1505-1AW30
BrandSiemens
TWD8,096.00
Each
units
24 → 240V ac/dc 1.5 → 30s DIN Rail Multi Function 1 - Seconds External SPDT - Screw 24V ac/dc 250 V dc, 400V ac -
RS Stock No. 818-4575
Mfr. Part No.2A8DT6
BrandGIC
TWD1,907.00
Each
units
24 → 240V ac/dc - DIN Rail Multi Function 2 - Hours, Minutes, Seconds External SPDT 5A Screw 24V ac/dc 240V ac/dc Silver Nickel
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. 746-6971
Mfr. Part No.1SVR730010R3200 CT-MBS.22S
BrandABB
TWD3,573.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 828-5177
Mfr. Part No.LRTM/2 12-230V AC/DC
TWD2,212.00
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 -