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. 420-9166
Mfr. Part No.MDD20SRP30VDC
BrandTempatron
$77.78
Each
units
10 → 30 V dc 0.5 → 20 s Encapsulated ON Delay Deenergise Panel Mount, PCB Mount Single - - Seconds External - - - - -
RS Stock No. 343-997
Mfr. Part No.UDT
BrandTempatron
$299.97
Each
units
18 → 264 V ac, 18 → 300 V dc 0.01 → 99.9 h, 0.01 → 99.9 min, 0.1 → 99.9 s Delay Cycle, Delay Pulse, Immediate Cycle, Interval, ON Delay Deenergise, ON Delay Energise Plug In Multi Function 1 - Hours, Minutes, Seconds External SP-NO/NC 10 A 11-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 349-771
Mfr. Part No.MDE20SRP30VDC
BrandTempatron
$73.34
Each
units
10 → 30 V dc 0.5 → 20 s ON Delay PCB Mount Single - - Seconds External - - - - -
RS Stock No. 398-6216
Mfr. Part No.UMT500MH
BrandTempatron
$285.69
Each
units
110 V ac, 230 V ac 00:01 → 99.59 h, 00:01 → 99.59 min, 0.1 → 999.9 s Cycle Timer with Cycle Limiter, Externally Activated Relay, Interval, ON Delay Deenergise, ON Delay Energise, ON Delay/OFF Delay DIN Rail Multi Function 1 - Hours, Minutes, Seconds External DP-NO/NC, 3P-NO 5 A - - 30 V dc, 240 V ac
RS Stock No. 420-9122
Mfr. Part No.MINT20SLP30VDC
BrandTempatron
$107.25
Each
units
10 → 30 V dc 0.5 → 20 s Encapsulated Interval Panel Mount, PCB Mount Single - - Seconds External - - - - -
RS Stock No. 347-810
Mfr. Part No.2BDC20SLP20SLP110VAC
BrandTempatron
$149.15
Each
units
110 V ac 0.5 → 20 s Delay Cycle Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 347-719
Mfr. Part No.FBDC20SLP20SLP230VAC
BrandTempatron
$149.15
Each
units
230 V ac 0.5 → 20 s Delay Cycle Panel Mount, Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 349-765
Mfr. Part No.MDE200SLP30VDC
BrandTempatron
$102.08
Each
units
10 → 30 V dc 5 → 200 s ON Delay PCB Mount Single - - Seconds External - - - - -
RS Stock No. 398-6200
Mfr. Part No.UMT500ML
BrandTempatron
$209.70
Each
units
12 → 24 V ac/dc 00:01 → 99.59 h, 00:01 → 99.59 min, 0.1 → 999.9 s Cycle Timer with Cycle Limiter, Externally Activated Relay, Interval, ON Delay Deenergise, ON Delay/OFF Delay DIN Rail Multi Function 1 - Hours, Minutes, Seconds External DP-NO/NC, 3P-NO 5 A - - 30 V dc, 240 V ac
RS Stock No. 237-8793
Mfr. Part No.TT32ML
BrandTempatron
$254.48
Each
units
12 → 24 V ac/dc 0 → 99:59 h, 0.1 → 999.9 s, 1 → 99:59 min Cycle, Dependent ON Delay Energise, Interval, ON Delay Deenergise, ON Delay Energise, ON Delay Energise & Interval, Pulse Delay, 24 Hour Clock Panel Mount Multi Function 2 - Hours, Minutes, Seconds External SPNC, SPNO - - - 30 V dc
RS Stock No. 217-1390
Mfr. Part No.TT4802-11
BrandTempatron
$161.36
Each
units
230 V ac 3 s → 30 m True OFF Delay Deenergise Panel Mount, Plug In Single 2 - Minutes, Seconds External DP-NO/NC 5 A 11-Pin Connector - 30 V dc, 230 V ac
RS Stock No. 347-804
Mfr. Part No.2BDC20SLP20SLP240VAC
BrandTempatron
$149.15
Each
units
240 V ac 0.5 → 20 s Delay Cycle Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 349-951
Mfr. Part No.2BDE200SLP12VDC
BrandTempatron
$83.30
Each
units
12 V dc 5 → 200 s ON Delay Energise Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - -
RS Stock No. 349-894
Mfr. Part No.2BDE20SLP110VAC
BrandTempatron
$110.04
Each
units
110 V ac 0.5 → 20 s ON Delay Energise Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - -
RS Stock No. 349-888
Mfr. Part No.2BDE200SLP240VAC
BrandTempatron
$110.04
Each
units
240 V ac 5 → 200 s ON Delay Energise Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - -
RS Stock No. 217-1362
Mfr. Part No.TT4801-12
BrandTempatron
$123.19
Each
units
110 V ac 6 s → 6 h ON Delay Energise Panel Mount, Plug In Single 2 TT4801 Hours, Seconds External DP-NO/NC 5 A 11-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 349-872
Mfr. Part No.2BDE20SLP240VAC
BrandTempatron
$117.49
Each
units
240 V ac 0.5 → 20 s ON Delay Energise Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - -
RS Stock No. 347-860
Mfr. Part No.2BDE30MLP12VDC
BrandTempatron
$122.63
Each
units
12 V dc 1.5 → 30 min ON Delay Energise Plug In Single 2 - Minutes External DP-NO/NC 10 A 8-Pin Connector - -
RS Stock No. 217-1340
Mfr. Part No.TT4801-11
BrandTempatron
$123.19
Each
units
230 V ac 6s → 6h ON Delay Energise Panel Mount, Plug In Single 2 TT4801 Hours, Minutes, Seconds External DP-NO/NC 5 A 11-Pin Connector - 30 V dc, 240 V ac
RS Stock No. 347-769
Mfr. Part No.FBDE20SLP230VAC
BrandTempatron
$126.54
Each
units
230 V ac 0.5 → 20 s ON Delay Energise Panel Mount, Plug In Single 2 - Seconds External DP-NO/NC 10 A 8-Pin Connector - 30 V dc, 240 V ac