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. 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. 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. 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. 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. 687-6109
Mfr. Part No.H5CX-L8-N
BrandOmron
TWD6,001.00
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. 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. 687-6106
Mfr. Part No.H5CX-AD-N
BrandOmron
TWD5,998.00
Each
units
12 → 24 V ac/dc 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. 349-1285
Mfr. Part No.H3YN-2 AC100-120
BrandOmron
TWD1,570.00
Each
units
100 → 120 V ac 0.1 s → 10 min Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 2 H3YN Minutes, Seconds External - 5 A Socket - 250 V ac
RS Stock No. 106-6272
Mfr. Part No.H3RN-1-B DC24
BrandOmron
TWD1,829.00
Each
units
24 V dc 0.1 s → 10 min Delay ON, Flicker OFF Start, Flicker ON Start, Interval Panel Mount Multi Function 2 H3RN Minutes, Seconds External SPDT 3 A Plug In - 250 V ac
RS Stock No. 106-6254
Mfr. Part No.H3YN-21-B AC100-120
BrandOmron
TWD1,570.00
Each
units
100 → 120 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. 177-0086
Mfr. Part No.H3CR-AP AC24-48/DC12-48
BrandOmron
TWD2,529.00
Each
units
12 → 48 V dc, 24 → 48 V ac 0.05 s → 300 h ON Delay DIN Rail Multi Function 2 H3CR Hours, Minutes, Seconds Internal DPDT 5 A Crimp 12 V dc, 24 V ac 48 V ac/dc
RS Stock No. 236-1436
Mfr. Part No.H3YN-41 DC24
BrandOmron
TWD1,781.00
Each
units
24 V dc 0.1 min → 10 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 4 H3YN Hours, Minutes External - 3 A Socket - 250 V ac
RS Stock No. 106-6255
Mfr. Part No.H3YN-21-B AC200-230
BrandOmron
TWD1,570.00
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. 106-6264
Mfr. Part No.H3YN-41-B AC100-120
BrandOmron
TWD1,781.00
Each
units
100 → 120 V ac 0.1 min → 10 h Delay ON, Flicker OFF Start, Flicker ON Start Panel Mount Multi Function 8 H3YN Hours, Minutes External 4NO/4NC 3 A Push In - 250 V ac
RS Stock No. 746-3852
Mfr. Part No.H5CN-YAN AC100-240
BrandOmron
TWD7,199.00
Each
units
24 V ac, 100 → 240 V ac 0.01 → 99.9 s ON Delay DIN Track, Panel Mount, Surface Mount Single 1 - Seconds External - 3 A 8-Pin Socket 5 V dc 250 V ac
RS Stock No. 236-1212
Mfr. Part No.H3RN11AC24
BrandOmron
TWD1,829.00
Each
units
24 V ac 0.1 min → 10 h Flicker OFF Start, Flicker ON Start Selectable by DIP Switch, Interval, ON Delay Chassis Mount Multi Function 1 H3RN Minutes, Seconds External - 3 A Socket - 250 V ac
RS Stock No. 340-538
Mfr. Part No.H3Y-4 AC100-120 10S
BrandOmron
TWD1,720.00
Each
units
100 → 120 V ac 0.5 → 10 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 250 V ac
RS Stock No. 106-6256
Mfr. Part No.H3YN-21-B AC24
BrandOmron
TWD1,570.00
Each
units
24 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. 746-3944
Mfr. Part No.H5AN-4DM AC100-240
BrandOmron
TWD15,683.00
Each
units
100 → 240 V ac 0.01 s → 9999 h Integrating Operation, Time Limit Operation Flush Mount Multi Function 1 H5AN Hours, Seconds External - 3 A Screw 30 V dc 250 V ac
RS Stock No. 340-516
Mfr. Part No.H3Y-4 AC24 10M
BrandOmron
TWD1,568.00
Each
units
24 V ac 0.5 → 10 min ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Minutes External - 5 A - - 250 V ac