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. 828-5170
Mfr. Part No.LEYD/A 12-230V AC/DC
TWD1,261.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Star/Delta DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 6 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 349-1279
Mfr. Part No.H3CR-H8L AC100-120 M
BrandOmron
TWD3,199.00
Each
units
100 → 120 V ac 0.05 → 12 min OFF Delay DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Minutes, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 783-4005
Mfr. Part No.1SVR730180R3100
BrandABB
TWD2,470.00
Each
units
- 0.05 s → 300 h OFF Delay DIN Rail Single 1 - Hours, Seconds - SPDT 50 mA Screw 24 V ac/dc 48 V dc, 240 V ac
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
TWD2,679.00
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Multi Function with NFC DIN Rail Multi Function 2 Zelio Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 834-7470
Mfr. Part No.3RP1511-2AP30
BrandSiemens
TWD2,244.00
Each
units
200 → 240 V 0.5 → 10 s ON Delay DIN Rail Multi Function 1 - Seconds External SPDT 1 A Cage Clamp - -
RS Stock No. 849-445
Mfr. Part No.88857005
BrandCrouzet
TWD4,310.00
Each
units
24 V ac/dc, 110 → 240 V ac 0.01 s → 9999 h A1, A2, AM, AMT Panel Mount Multi Function 2 - Hours, Seconds External DPDT 8 A 8-Pin Connector 110 V ac 24 V dc, 240 V ac
RS Stock No. 834-7473
Mfr. Part No.3RP1512-1AP30
BrandSiemens
TWD2,249.00
Each
units
200 → 240 V 1.5 → 30 s ON Delay DIN Rail Single 1 - Seconds External SPDT 1 A Screw - -
RS Stock No. 828-5177
Mfr. Part No.LRTM/2 12-230V AC/DC
TWD2,045.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Delayed Pulse Function, Recycling On/Off DIN Rail Dual Function 2 - Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 349-1291
Mfr. Part No.H3YN-21 AC100-120
BrandOmron
TWD1,570.00
Each
units
100 → 120 V ac 0.1 min → 10 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 2 H3YN Hours, Minutes External - 5 A Socket - 250 V ac
RS Stock No. 746-7090
Mfr. Part No.1SVR730180R3100
BrandABB
TWD2,480.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h OFF Delay DIN Rail Single 1 - Hours, Seconds External SPDT 4 A Push In 12 V 300 V ac
RS Stock No. 877-8105
Mfr. Part No.2901484
TWD1,116.00
Each
units
- 3 → 300 min Switch ON Delay DIN Rail Single 2 ETD-BL-1T-ON-CC-300MIN-PT Minutes External SPDT - Screw 19.2 V dc 30 V dc
RS Stock No. 185-097
Mfr. Part No.1SVR500110R0100 - CT-AHD.22
BrandABB
TWD2,364.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h OFF Delay DIN Rail Single 2 - Hours, Seconds External DPDT 6 A - 12 V 250 V
RS Stock No. 340-4887
Mfr. Part No.B1MFT 24VAC/DC/230VAC 2-60 MI
TWD1,517.00
Each
units
24 V ac/dc, 230 V ac 0.25 → 60 min, 0.5 → 60 s Interval, ON Delay, Symmetrical OFF/ON Repeat Cycle, Symmetrical ON/OFF Repeat Cycle Plug In Multi Function 2 - Minutes, Seconds External DPDT 8 A - - 25 V dc, 250 V ac
RS Stock No. 774-0301
Mfr. Part No.88827103
BrandCrouzet
TWD1,860.00
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Asymmetrical, Interval, OFF Delay, ON Delay, ON Pulse, Symmetrical DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS Stock No. 831-6003
Mfr. Part No.3RP2505-1BW30
BrandSiemens
TWD3,766.00
Each
units
12 → 240 V ac/dc 1 s → 100 h Multi Function - Multi Function 2 - Hours, Minutes, Seconds - DPDT - Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 329-238
Mfr. Part No.XW-S2
TWD2,223.00
Each
units
10.5 → 265 V ac/dc 0.6 → 60 min, 0.6 → 60 s ON Pulse without Control Switch Plug In Multi Function 2 XW-S2 Minutes, Seconds External DPDT 8 A 11-Pin Connector 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 305-6012
Mfr. Part No.81506720
BrandCrouzet
TWD5,436.00
Each
units
- 0.1 → 30 s ON Delay Panel Mount Multi Function - - Seconds - - - Screw - -
RS Stock No. 442-9168
Mfr. Part No.1SVR550019R0000
BrandABB
TWD1,710.00
Each
units
24 → 240 V ac/dc 0.1 → 300 s Flash Start with OFF, Flash Start with ON, Impulse ON, ON Delay DIN Rail Multi Function - - Seconds External Solid State Output - - - -
RS Stock No. 446-0327
Mfr. Part No.80.01.0.240.0000
BrandFinder
TWD2,208.00
Each
units
12 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h Interval, Interval with Control Signal ON, OFF Delay with Control Signal, ON & OFF Delay with Control Signal, ON Delay, Symmetrical Flash (Starting Pulse ON) DIN Rail Multi Function 1 80 Series Hours, Minutes, Seconds External SPDT 16A Screw 250 V ac 400 V ac
RS Stock No. 746-5126
Mfr. Part No.3RP1505-1BW30
BrandSiemens
TWD5,601.00
Each
units
24 → 240 V ac/dc 0.5 → 10 min - DIN Rail Multi Function 2 - Minutes External DPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac