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. 470-7913
Mfr. Part No.3RP2005-1AP30
BrandSiemens
HK$741.27
Each
units
24 V ac/dc, 110 → 240 V ac 0.05 → 100 h, 0.05 → 100 min, 0.05 → 100 s Additive ON Delay with Auxiliary Voltage, Flash Start with Interval, OFF Delay with Auxiliary Voltage, ON Delay, ON Delay & OFF Delay with Auxiliary Voltage, Passing Break Contact with Auxiliary Voltage, Passing Make Contact, Pulse Former with Auxiliary Voltage DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 1 (dc) A, 3 (ac) A Screw - 250 V ac/dc
RS Stock No. 160-307
Mfr. Part No.E3ZM20 12-240V AC/DC
BrandTele
HK$734.03
Each
units
12 → 240 V ac/dc 50 ms → 100 h Flash Pause First, OFF Delay, ON Delay, ON Delay with Control Contact, One Shot Leading Edge Voltage Controlled, One Shot Leading Edge with Control Contact, One Shot Trailing Edge with Control Contact DIN Rail Multi Function 2 E3ZM20 Hours, Milliseconds, Minutes, Seconds External DPDT 8 A - - 250 V ac
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
HK$356.09
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 746-5145
Mfr. Part No.3RP1525-1BP30
BrandSiemens
HK$1,046.42
Each
units
24 V ac/dc, 200 → 240 V ac 0.05 → 1 min ON Delay DIN Rail Single 2 - Minutes External DPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS Stock No. 914-8198
Mfr. Part No.REXL2TMB7
HK$526.24
Each
units
24 V ac 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS Stock No. 825-4637
Mfr. Part No.H5CN-XAN AC100-240
BrandOmron
HK$2,624.00
Each
units
12 → 48 V dc, 100 → 240 V ac 0.001 → 99.99 s ON Delay Flush Mount, Surface Mount Single 1 H5CN Seconds External SPDT 3 A PCB Pin 12 V dc, 100 V ac 48 V dc, 240 V ac
RS Stock No. 236-1408
Mfr. Part No.H3YN-4 AC200-230
BrandOmron
HK$447.94
Each
units
200 → 230 V ac 0.1 s → 10 min Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 4 H3YN Minutes, Seconds External - 3 A Socket - 250 V ac
RS Stock No. 221-092
Mfr. Part No.80.41.0.240.0000
BrandFinder
HK$528.28
Each
units
24 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h OFF Delay with Control Signal DIN Rail Single 1 80 Series Hours, Minutes, Seconds External SPDT 16 A Screw 16.8 V ac/dc 265 V ac/dc
RS Stock No. 106-6237
Mfr. Part No.H3DT-N1
BrandOmron
HK$535.29
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 2 H3DT - External SPDT 5 A Screw - 30 V dc, 250 V ac
RS Stock No. 791-2727
Mfr. Part No.RE17RHMU
HK$329.98
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Pulse DIN Rail Multi Function 1 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS Stock No. 687-6106
Mfr. Part No.H5CX-AD-N
BrandOmron
HK$1,829.26
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. 159-600
Mfr. Part No.85.04.0.125.0000
BrandFinder
HK$379.01
Each
units
110 → 125 V ac/dc 0.05 → 100s, 0.5 → 100min Interval, On Delay, Pulse Delayed, Symmetrical Flasher Plug In Multi Function 4 85 Series Hours, Minutes, Seconds External 4PDT 7 A 14-Pin Connector 93.5 V ac/dc 137.5 V ac/dc
RS Stock No. 221-086
Mfr. Part No.80.11.0.240.0000
BrandFinder
HK$542.69
Each
units
24 → 240 V ac/dc 0.1 → 20 min, 0.1 → 20 s, 0.1 → 24 h ON Delay DIN Rail Single 1 80 Series Hours, Minutes, Seconds External SPDT 16 A Screw 16.8 V ac/dc 265 V ac/dc
RS Stock No. 827-3436
Mfr. Part No.RUW101MW
HK$758.63
Each
units
- - Multi Function Plug In Multi Function - - - - - - - 24 V ac/dc 240 V ac/dc
RS Stock No. 237-8793
Mfr. Part No.TT32ML
BrandTempatron
HK$999.87
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. 188-4629
Mfr. Part No.H3CRH8LAC200240M
BrandOmron
HK$1,048.03
Each
units
200 → 240 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. 392-7188
Mfr. Part No.3RP1574-1NP30
BrandSiemens
HK$932.59
Each
units
200 → 240 V 1 → 20 s WYE Delta - Single 2 - Seconds External SPDT - Screw - -
RS Stock No. 349-888
Mfr. Part No.2BDE200SLP240VAC
BrandTempatron
HK$586.56
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. 341-373
Mfr. Part No.XM-D1
HK$486.40
Each
units
10.5 → 265 V ac/dc 0.6 → 60 min ON Delay, ON Pulse, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 1 XM-D1 Minutes External SPDT 8 A Screw 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 160-262
Mfr. Part No.E1ZMQ10 24-240V AC/DC
BrandTele
HK$351.50
Each
units
24 → 240 V ac/dc 50 ms → 100 h Flash Pause First, OFF Delay, ON Delay, One Shot Leading Edge Voltage Controlled DIN Rail Multi Function 1 E1ZMQ10 Hours, Milliseconds, Minutes, Seconds External SPDT 8 A - - 250 V ac
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