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. 328-358
Mfr. Part No.H3CR-A8 AC100-240/DC100-125
BrandOmron
PHP7,021.90
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. 113-8134
Mfr. Part No.H3CR-A AC100-240/DC100-125
BrandOmron
PHP7,089.00
Each
units
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, One Shot, Signal OFF Delay, Signal ON/OFF Delay DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 11-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
PHP2,555.51
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. 791-2711
Mfr. Part No.RE17RAMU
PHP2,861.40
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. 188-4584
Mfr. Part No.H3CR-F8 AC100-240
BrandOmron
PHP6,583.47
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. 328-364
Mfr. Part No.H3CR-A8 AC24-48/DC12-48
BrandOmron
PHP7,032.70
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. 746-5189
Mfr. Part No.3RP1576-1NP30
BrandSiemens
PHP6,343.79
Each
units
24 V ac/dc, 200 → 240 V ac 3 → 60 s WYE Delta DIN Rail Single 2 - Seconds External SPNO 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS Stock No. 687-6092
Mfr. Part No.H5CX-A-N
BrandOmron
PHP12,443.23
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. 791-2708
Mfr. Part No.RE17LAMW
PHP3,949.80
Each
units
24 → 240 V ac/dc 0.1 s → 100 h ON Delay DIN Rail Single - RE17 Hours, Minutes, Seconds - - 20 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 343-997
Mfr. Part No.UDT
BrandTempatron
PHP8,638.40
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. 746-3887
Mfr. Part No.H3CA-A-306
BrandOmron
PHP15,513.50
Each
units
12 → 240 V dc, 24 → 240 V ac 0.1 s → 9990 h Interval Operation, ON Delay Operation, One Shot & Flicker Operation, Repeat Cycle Operation, Signal OFF Delay Operation, Signal ON/OFF Delay, Signal ON/OFF Delay Operation DIN Track, Flush Mount, Surface Mount Multi Function 1 - Hours, Seconds External - 3 A 11-Pin Socket - 250 V ac
RS Stock No. 791-2739
Mfr. Part No.RE17RLMU
PHP4,117.20
Each
units
24 V dc, 24 → 240 V ac 0.1 s → 100 h Asymmetrical 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. 746-5176
Mfr. Part No.3RP1560-1SP30
BrandSiemens
PHP11,347.54
Each
units
24 V ac/dc, 200 → 240 V ac 1 → 20 s WYE Delta DIN Rail Single 3 - Seconds External 3PNO 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS Stock No. 442-9332
Mfr. Part No.1SVR550118R4100
BrandABB
PHP3,687.05
Each
units
24 V ac/dc 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 442-9326
Mfr. Part No.1SVR550118R1100
BrandABB
PHP3,687.05
Each
units
24 V ac/dc 0.1 → 10 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 442-9310
Mfr. Part No.1SVR550111R4100 - CT-AHE
BrandABB
PHP3,687.05
Each
units
220 → 240 V ac 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 467-6875
Mfr. Part No.88886116
BrandCrouzet
PHP6,477.30
Each
units
12 → 240 V dc, 24 → 240 V ac 0.02 → 300 h, 0.02 → 300 min, 0.02 → 300 s A1, A2, D, Di, H1, H2, Q1, Q2 Plug In Multi Function 2 - Hours, Minutes, Seconds External DPDT 5 A 8-Pin Connector 12 V dc, 24 V ac 240 V ac/dc
RS Stock No. 160-262
Mfr. Part No.E1ZMQ10 24-240V AC/DC
BrandTele
PHP2,379.70
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
RS Stock No. 392-7223
Mfr. Part No.3RP1505-1BP30
BrandSiemens
PHP10,573.24
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.5 → 10 s - - Multi Function - - Seconds External DPDT - Screw - -
RS Stock No. 746-5110
Mfr. Part No.3RP1505-1AW30
BrandSiemens
PHP10,419.16
Each
units
24 → 240 V ac/dc 1.5 → 30 s - DIN Rail Multi Function 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
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