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. 221-086
Mfr. Part No.80.11.0.240.0000
BrandFinder
TWD1,615.00
Each
units
24 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h ON Delay DIN Rail Single 1 80 Series Hours, Minutes, Seconds External SPDT 16 A Screw 16.8 V ac/dc 265 V ac/dc
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
TWD1,321.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Delay Off (DN), Delay On (DO), Delay On (DOb), Interval (IN), Interval Leading (INb), Interval Trailing (INa), Symmetrical Recycler OFF/ON (RF) DIN Rail 7 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 733-4953
Mfr. Part No.H3DK-S1 AC/DC24-240
BrandOmron
TWD1,526.00
Each
units
24 → 240 V ac/dc 0.1 s → 1200 h Flicker ON Start, Interval, ON Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5 A Screw 24 V 30 V dc, 250 V ac
RS Stock No. 684-3689
Mfr. Part No.2917463
TWD1,396.00
Each
units
19.2 → 30 V dc 3 → 300 s OFF Delay with Control Contact DIN Rail Single 1 ETD-BL-1T-OFF-CC-300S Seconds External - 6.3 A Screw - -
RS Stock No. 687-6092
Mfr. Part No.H5CX-A-N
BrandOmron
TWD7,143.00
Each
units
100 → 240 V ac 0.001 s → 9999 h Cumulative, Interval, ON/OFF Duty Adjustable Flicker, Power ON Delay I, Power ON Delay II Repeat Cycle I, Repeat Cycle II, Signal OFF Delay, Signal ON Delay I, Signal ON Delay II, Stopwatch Panel Mount Multi Function 1 H5CX Hours, Seconds External - - Screw - -
RS Stock No. 914-4597
Mfr. Part No.LEDO/2 12-230V AC/DC
TWD1,059.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h ON Delay DIN Rail - 2 - Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 230 V ac/dc
RS Stock No. 827-3436
Mfr. Part No.RUW101MW
TWD1,564.00
Each
units
- - Multi Function Plug In - - - - - - - - 24 V ac/dc 240 V ac/dc
RS Stock No. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
TWD1,029.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 828-5151
Mfr. Part No.LMMT/2 12-230V AC/DC
TWD1,366.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Delay Off (DN), Delay On (DO), Delay On (DOb), Interval (IN), Interval Leading (INb), Interval Trailing (INa), Symmetrical Recycler OFF/ON (RF) DIN Rail 7 2 - Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 392-7223
Mfr. Part No.3RP1505-1BP30
BrandSiemens
TWD4,120.00
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.5 → 10 s - - Multi Function - - Seconds External DPDT - Screw - -
RS Stock No. 456-0310
Mfr. Part No.1SBN020010R1001
BrandABB
TWD2,220.00
Each
units
24 V ac/dc 0.8 → 8 s, 6 → 60 s ON Delay DIN Rail Single - - Seconds External - 5 A Screw 24 V ac 240 V ac
RS Stock No. 818-4575
Mfr. Part No.2A8DT6
BrandGIC
TWD1,528.00
Each
units
24 → 240 V ac/dc 0.1 s → 120 Days Accumulative Delay On Signal, Cyclic OFF/ON, Cyclic ON/OFF, Delayed Impulse, Impulse ON/OFF, Interval, Inverted Signal On Delay, Leading Edge Impulse, ON Delay, One Shot, Signal ON/OFF Delay, Step Mode, Trailing Edge Impulse DIN Rail Multi Function 2 - Hours, Minutes, Seconds External SPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 857-7094
Mfr. Part No.DAA51CM24
TWD2,240.00
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Single 2 - Hours, Minutes, Seconds External SPDT 5 A Screw - -
RS Stock No. 308-0784
Mfr. Part No.XMW-D1
TWD2,084.00
Each
units
10.5 → 265 V ac/dc 0 → 60 min, 0 → 60 s Asymmetrical Recycler with Pause Start, Asymmetrical Recycler with Pulse Start, Delay Pulse, OFF Pulse, ON Delay, ON Pulse, ON Pulse with Control Switch, One Shot Asymmetrical with Control Switch, One Shot Asymmetrical without Control Switch, Release Delay, Release True OFF Delay, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 1 XMW-D1 Seconds External SPDT 8 A Screw 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 746-5110
Mfr. Part No.3RP1505-1AW30
BrandSiemens
TWD4,170.00
Each
units
24 → 240 V ac/dc 1.5 → 30 s - DIN Rail Multi Function 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS Stock No. 828-5164
Mfr. Part No.LART 12-230V AC/DC
TWD1,274.00
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Off/On, Recycling On/Off DIN Rail Dual Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 733-4956
Mfr. Part No.H3DK-M1 AC/DC24-240
BrandOmron
TWD1,974.00
Each
units
24 → 240 V ac/dc 0.1 s → 1200 h Flicker OFF Start, Flicker ON Start, Interval, OFF Delay, ON Delay, ON/OFF Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - SPDT 5 A Screw 24 V 30 V dc, 250 V ac
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. 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. 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 - -