Timer Relays

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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Viewing 1 - 20 of 24 products
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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. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
£27.64
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. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
£25.53
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. 828-5161
Mfr. Part No.LESW 12-230V AC/DC
£27.64
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h OFF 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
£30.68
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. 914-4597
Mfr. Part No.LEDO/2 12-230V AC/DC
£30.06
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. 828-5164
Mfr. Part No.LART 12-230V AC/DC
£33.34
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. 828-5199
Mfr. Part No.LEDF 24VAC/DC/230VAC. 0.5-10 Mins
£39.59
Each
Units
230 V ac, 24 V ac/dc 0.5 → 10 min True Delay Off DIN Rail Single 1 - Minutes External SPDT 8 A Screw - -
RS Stock No. 362-4081
Mfr. Part No.M1ESDO 24-230VAC/DC
£29.65
Each
Units
24 → 230 V ac/dc 1 → 10 min ON Delay DIN Rail Single - MK7850N Minutes External - 500 mA Connector 24 V ac/dc 230 V ac/dc
RS Stock No. 828-5177
Mfr. Part No.LRTM/2 12-230V AC/DC
£56.64
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. 340-4887
Mfr. Part No.B1MFT 24VAC/DC/230VAC 2-60 MI
£34.46
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. 828-5195
Mfr. Part No.LEDF 24VAC/DC/230VAC. 2-60 Sec
£38.94
Each
Units
24 V ac/dc, 230 V ac 2 → 60 s True Delay Off DIN Rail Single 1 - Seconds External SPDT 8 A Screw - -
RS Stock No. 828-5192
Mfr. Part No.LEDF 24VAC/DC/230VAC. 0.5-10 Sec
£38.94
Each
Units
230 V ac, 24 V ac/dc 0.5 → 10 s True Delay Off DIN Rail Single 1 - Seconds External SPDT 8 A Screw - -
RS Stock No. 828-5173
Mfr. Part No.LEDK 12-230V AC/DC
£33.21
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h Delay On with Instantaneous Contact DIN Rail Single 2 - Hours, Minutes, Seconds External 2 x SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 828-5167
Mfr. Part No.LEIN 12-230V AC/DC
£26.12
Each
Units
12 → 230 V ac/dc 0.1 s → 100 h Interval (One Shot) DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 340-5795
Mfr. Part No.B1MFT 24VAC/DC/110VAC 2-60 MI
£34.46
Each
Units
24 V ac/dc, 110 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. 828-5170
Mfr. Part No.LEYD/A 12-230V AC/DC
£33.48
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. 828-5183
Mfr. Part No.LEDF 24VAC/DC/110VAC. 0.5-10 Mins
£38.94
Each
Units
110 V ac, 24 V ac/dc 0.5 → 10 min True Delay Off DIN Rail Single 1 - Minutes External SPDT 8 A Screw - -
RS Stock No. 362-4075
Mfr. Part No.M1DRT 115VAC 2-60SECS/100M/S
£36.50
Each
Units
115 V ac 2 → 60 s Auto Reset Timer DIN Rail Single 1 MK7850N Minutes, Seconds External SPDT 8 A - - 25 V dc, 250 V ac
RS Stock No. 362-4104
Mfr. Part No.M1DRT 230VAC 2-60SECS 100M/S
£36.50
Each
Units
230 V ac 2 → 60 s Auto Reset Timer DIN Rail Single 1 IK7817N Minutes, Seconds External SPDT 8 A - - 25 V dc, 250 V ac
RS Stock No. 828-5186
Mfr. Part No.LEDF 24VAC/DC/110VAC. 0.5-10 Sec
£38.94
Each
Units
110 V ac, 24 V ac/dc 0.5 → 10 s True Delay Off DIN Rail Single 1 - Seconds External SPDT 8 A Screw - -