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. 914-5070
Mfr. Part No.RENF22R2MMW
HK$885.07
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. 808-6623
BrandRS PRO
HK$668.78
Each
units
24 V ac/dc - One Shot Panel Mount Single 1 - Hours, Minutes, Seconds External SPDT 50 mA - - 24 V ac/dc
RS Stock No. 774-0304
Mfr. Part No.88827105
BrandCrouzet
HK$658.52
Each
units
24 240 V ac, 24 V 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. 341-389
Mfr. Part No.XW-D1
HK$1,074.30
Each
units
10.5 → 265 V ac/dc 0.6 → 60 min, 0.6 → 60 s ON Pulse without Control Switch DIN Rail Multi Function 1 XW-D1 Minutes, Seconds External SPDT 8 A Screw 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 328-364
Mfr. Part No.H3CR-A8 AC24-48/DC12-48
BrandOmron
HK$869.22
Each
units
12 → 48 V dc, 24 → 48 V ac 0.05 s → 300 h Flicker ON Start, Interval, ON Delay, One Shot DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 456-0348
Mfr. Part No.1SBN020010R1004
BrandABB
HK$713.11
Each
units
380 440 V ac 0.8 60 s Star Delta DIN Rail Single - - Seconds External - 4 A Screw - 230 V ac
RS Stock No. 328-358
Mfr. Part No.H3CR-A8 AC100-240/DC100-125
BrandOmron
HK$867.85
Each
units
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker ON Start, Interval, ON Delay, One Shot DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 687-6109
Mfr. Part No.H5CX-L8-N
BrandOmron
HK$1,615.33
Each
units
100 → 240 V ac 0.001 s → 9999 h Flicker OFF Start 1, Flicker OFF Start 2, Flicker ON Start 1, Flicker ON Start 2 Panel Mount Multi Function 1 H5CX Hours, Seconds External - - 8-Pin Connector - -
RS Stock No. 897-6700
Mfr. Part No.RE22R2ACMR
HK$793.11
Each
units
24 240 V ac/dc 0.05 1 s, 0.3 3 s, 1 10 s, 3 30 h, 3 30 min, 3 30 s, 10 100 s, 30 300 h, 30 300 min, 30 300 s OFF Delay, ON Delay DIN Rail Multi Function 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 188-4578
Mfr. Part No.H3CR-F8 AC/DC24
BrandOmron
HK$972.43
Each
units
24 V ac/dc 0.05 s → 30 h Flicker OFF DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 536-2779
BrandRS PRO
HK$264.04
Each
units
250 V ac 0 → 120 min - Panel Mount - - - - External - - - - -
RS Stock No. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
HK$280.90
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. 349-1279
Mfr. Part No.H3CR-H8L AC100-120 M
BrandOmron
HK$1,014.00
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. 897-6738
Mfr. Part No.RE22R1QCMU
HK$517.25
Each
units
24 240 V ac/dc 0.05 300 s Star Delta DIN Rail Single 1 RE22 R1 Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
HK$404.25
Each
units
24 240 V ac, 24 V dc 0.1 s 100 h OFF Delay DIN Rail Single 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 106-6255
Mfr. Part No.H3YN-21-B AC200-230
BrandOmron
HK$359.67
Each
units
200 230 V ac 0.1 min 10 h Delay ON, Flicker OFF Start, Flicker ON Start Panel Mount Multi Function 4 H3YN Hours, Minutes External DPDT 5 A Push In - 250 V ac
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
HK$338.13
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 Multi Function 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
HK$348.46
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. 188-4584
Mfr. Part No.H3CR-F8 AC100-240
BrandOmron
HK$972.43
Each
units
100 → 240 V ac 0.05 s → 30 h Flicker OFF DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 759-6643
Mfr. Part No.83.02.0.240.0000
BrandFinder
HK$838.44
Each
units
24 240 V ac/dc 0.05-10 d, 0.05-10 h, 0.05-10 min, 0.05-10 s ON Delay DIN Rail Multi Function 2 83 Series Days, Hours, Minutes, Seconds External SPDT 12 A - 16.8 V ac/dc 265 V ac / V dc
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