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. 349-1291
Mfr. Part No.H3YN-21 AC100-120
BrandOmron
TWD1,616.00
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. 687-6109
Mfr. Part No.H5CX-L8-N
BrandOmron
TWD6,062.00
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. 349-1279
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. 687-6106
Mfr. Part No.H5CX-AD-N
BrandOmron
TWD6,865.00
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. 106-6272
Mfr. Part No.H3RN-1-B DC24
BrandOmron
TWD1,893.00
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. 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. 746-3861
Mfr. Part No.H5CN-YCN AC100-240
BrandOmron
TWD7,199.00
Each
units
24 V ac, 100 → 240 V ac 1 s → 99 min 59 s ON Delay DIN Track, Panel Mount, Surface Mount Single 1 - Minutes, Seconds External - 3 A 8-Pin Socket 5 V dc 250 V ac
RS Stock No. 746-3865
Mfr. Part No.H5CN-YCN DC12-48
BrandOmron
TWD10,527.00
Each
units
12 → 48 V dc 1 s → 99 min 59 s ON Delay DIN Track, Panel Mount, Surface Mount Single 1 - Minutes, Seconds External - 3 A 8-Pin Socket 5 V dc 250 V ac
RS Stock No. 746-3868
Mfr. Part No.H5CN-YBN DC12-48
BrandOmron
TWD7,199.00
Each
units
12 → 48 V dc 0.1 → 999.9 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. 177-0093
Mfr. Part No.H3CR-AS 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 - H3CR Hours, Minutes, Seconds Internal - 100 mA Crimp 12 V dc, 24 V ac 48 V ac/dc
RS Stock No. 746-3846
Mfr. Part No.H5CN-XDNM AC100-240
BrandOmron
TWD7,199.00
Each
units
24 V ac, 100 → 240 V ac 1 min → 99 h 59 min ON Delay DIN Track, Panel Mount, Surface Mount Single 1 - Hours, Minutes External - 3 A 11-Pin Socket 5 V dc 250 V ac
RS Stock No. 106-6236
Mfr. Part No.H3DT-N2
BrandOmron
TWD2,681.00
Each
units
24 240 V ac/dc 0.1 s 100 h Delay OFF, Delay ON, Flicker OFF Start, Flicker ON Start, Interval DIN Rail Multi Function 4 H3DT - External DPDT 5 A Screw - 30 V dc, 250 V ac
RS Stock No. 177-0094
Mfr. Part No.H3CR-H8L 100-120VAC S
BrandOmron
TWD3,364.00
Each
units
100 → 120 V ac 0.05 → 12 s OFF Delay DIN Rail Multi Function 2 H3CR Minutes, Seconds External DPDT 5 A Crimp 100 V ac 120 V ac
RS Stock No. 236-1262
Mfr. Part No.H3RN21DC24
BrandOmron
TWD1,867.00
Each
units
24 V dc 0.1 min → 10 h Flicker OFF Start, Flicker ON Start Selectable by DIP Switch, Interval, ON Delay Chassis Mount Multi Function 2 H3RN Hours, Minutes External - 3 A Socket - 250 V ac
RS Stock No. 177-0088
Mfr. Part No.H3CR-G8EL AC200-240
BrandOmron
TWD3,559.00
Each
units
200 → 240 V ac 0.5 → 120 s Star-Delta Timer DIN Rail Multi Function 1 H3CR Seconds External SPST 5 A Crimp 200 V ac 240 V ac
RS Stock No. 340-487
Mfr. Part No.H3Y-4 AC24 60S
BrandOmron
TWD1,782.00
Each
units
24 V ac 2 → 60 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 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