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. 160-262
Mfr. Part No.E1ZMQ10 24-240V AC/DC
BrandTele
$79.70
Each
units
24 → 240V ac/dc 50 ms → 100h - DIN Rail Multi Function 1 E1ZMQ10 Hours, Milliseconds, Minutes, Seconds External SPDT 8A - - 250V ac
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
$81.74
Each
units
24 to 230 V ac/12 to 230V dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw 24 Vac / 12V dc 265V ac/dc
RS Stock No. 896-6813
BrandRS PRO
$68.57
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 6A Screw 12V ac/dc 240V ac/dc
RS Stock No. 536-2779
BrandRS PRO
$83.93
Each
units
250V ac 0 → 120min - Panel Mount - - - - External - - - - -
RS Stock No. 774-0308
Mfr. Part No.88827115
BrandCrouzet
$127.75
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 113-8134
Mfr. Part No.H3CR-A AC100-240/DC100-125
BrandOmron
$271.69
Each
units
100 → 125 V dc, 100 → 240V ac 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A 11-Pin Connector - 125 V dc, 250V ac
RS Stock No. 340-421
Mfr. Part No.H3Y-4 DC24 3M .
BrandOmron
$99.10
Each
units
24V dc 0.1 → 3min - DIN Rail, Surface Mount Single 4 H3Y-4 Minutes External - 5A - - 250V ac
RS Stock No. 828-5155
Mfr. Part No.LEDO 12-230V AC/DC
$70.73
Each
units
12 → 230V ac/dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw 12V ac/dc 265V ac/dc
RS Stock No. 774-0317
Mfr. Part No.88827125
BrandCrouzet
$130.32
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 791-2723
Mfr. Part No.RE17RCMU
$127.31
Each
units
24 V dc, 24 → 240V ac 0.1 s → 100h - DIN Rail Single 2 RE17 Hours, Minutes, Seconds - SPDT 8A Screw 24V ac 24 V dc, 240V ac
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
$91.90
Each
units
24 V dc, 24 → 240V ac 0.1 s → 100h - DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8A Screw 24V ac 24 V dc, 240V ac
RS Stock No. 328-358
Mfr. Part No.H3CR-A8 AC100-240/DC100-125
BrandOmron
$271.69
Each
units
100 → 125 V dc, 100 → 240V ac 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A - - 125 V dc, 250V ac
RS Stock No. 774-0304
Mfr. Part No.88827105
BrandCrouzet
$177.40
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 896-6872
BrandRS PRO
$216.24
Each
units
110 → 240V ac - - Panel Mount Multi Function 2 - Days, Hours, Minutes, Seconds External - 5A PCB Pin 110V ac 240V ac
RS Stock No. 896-6879
BrandRS PRO
$196.21
Each
units
110 → 240V ac - - Panel Mount Multi Function 2 - Days, Hours, Minutes, Seconds External DPDT 5A PCB Pin 110V ac 240V ac
RS Stock No. 914-4597
Mfr. Part No.LEDO/2 12-230V AC/DC
$60.91
Each
units
12 → 230V ac/dc 0.1 s → 100h - DIN Rail - 2 - Hours, Minutes, Seconds External DPDT 8A Screw 12V ac/dc 230V ac/dc
RS Stock No. 818-4563
Mfr. Part No.1CMDT0
BrandGIC
$70.83
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 6A Screw 12V ac/dc 240V ac/dc
RS Stock No. 774-0301
Mfr. Part No.88827103
BrandCrouzet
$176.58
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 340-392
Mfr. Part No.H3Y-4 DC24 10S
BrandOmron
$161.07
Each
units
24V dc 0.5 → 10s - DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5A - - 250V ac
RS Stock No. 365-6987
Mfr. Part No.H3DS-ML AC/DC
BrandOmron
$52.48
Each
units
24 → 230 V ac, 24 → 48V dc 0.1 s → 120h - DIN Rail Multi Function 1 EF7616. Hours, Seconds External - 5A Screw - 30 V dc, 250V ac