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. 225-8318
Mfr. Part No.031891 & ETR4-69-A
BrandEaton
TWD5,522.00
Each
units
24 → 240V ac/dc 0.05s → 100h - DIN Rail Multi Function 1 ETR4 Hours, Seconds External SPDT 3A Screw 24V ac/dc 240 V dc, 400V ac
RS Stock No. 791-2708
Mfr. Part No.RE17LAMW
TWD1,335.00
Each
units
24 → 240V ac/dc 0.1 s → 100h - DIN Rail Single - RE17 Hours, Minutes, Seconds - - 20A Screw 24V ac/dc 240V ac/dc
New
RS Stock No. 220-2593
Mfr. Part No.700-HNC44AZ25
TWD1,970.00
Each
units
- - - - Multi Function - - - - - - - - -
RS Stock No. 746-7107
Mfr. Part No.1SVR500020R1100 CT-MFD.21
BrandABB
TWD3,803.00
Each
units
12 → 24V ac/dc 0.05 s → 100h - DIN Rail Multi Function 2 - Hours, Seconds External DPDT 5A Screw 12V 250V ac
RS Stock No. 896-6813
BrandRS PRO
TWD829.00
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. 782-1548
Mfr. Part No.7014PD
TWD22,910.00
Each
units
- 10 → 100s - Panel Mount - - - - - - 15A Screw - 125V dc
RS Stock No. 782-3131
Mfr. Part No.7012PJL
TWD18,539.00
Each
units
- 3 → 120s - Panel Mount - - - - - - - - - 125V dc
New
RS Stock No. 220-2623
Mfr. Part No.700-HRQN2HA22
TWD3,821.00
Each
units
200 → 240V ac - - - Multi Function - - - - - - - - -
RS Stock No. 831-6031
Mfr. Part No.3RP2525-1AW30
BrandSiemens
TWD3,262.00
Each
units
12 → 240V ac/dc 0.05 s → 100h - - Single 1 - Hours, Seconds - SPDT - Screw 12V ac/dc 240V ac/dc
RS Stock No. 733-4943
Mfr. Part No.H3DKHDLAC200240V
BrandOmron
TWD4,113.00
Each
units
200 → 240V ac 1 → 12 s, 10 → 120s - DIN Rail Single - H3DK Seconds - - 5A - - 30 V dc, 250V ac
RS Stock No. 896-8692
Mfr. Part No.RE22R1CMR
TWD2,634.00
Each
units
24 → 240V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300s - DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8A Screw 24V ac/dc 240V ac/dc
New
RS Stock No. 220-2625
Mfr. Part No.700-HRQR2HA12
TWD3,821.00
Each
units
120V ac - - - Multi Function - - - - - - - - -
RS Stock No. 841-1622
Mfr. Part No.H3CR-A-301 AC100-240/DC100-125
BrandOmron
TWD3,664.00
Each
units
- - - Panel Mount - - H3CR - - DPDT - Screw - -
RS Stock No. 228-706
Mfr. Part No.LC4HSVR424SJ
BrandPanasonic
TWD5,815.00
Each
units
24V ac - - Panel Mount - - - - - - - - - -
RS Stock No. 182-9962
Mfr. Part No.OA2R10MV1
BrandCrouzet
TWD2,353.00
Each
units
12 → 240V ac/dc 0.05 → 1 days, 0.05 → 1 h, 0.05 → 1 min, 0.5 → 10 days, 0.5 → 10 h, 0.5 → 10 s, 0.5 → 10min - Plug In Multi Function 2 OA2R - - SPDT 10A Plug In 12V ac/dc 240V ac/dc
RS Stock No. 791-2742
Mfr. Part No.RE17RMJU
TWD2,902.00
Each
units
12V ac/dc 0.1 s → 100h - DIN Rail Multi Function 2 RE17 Hours, Minutes, Seconds - SPDT 8A Screw - 12V ac/dc
RS Stock No. 134-5390
Mfr. Part No.XB5DTGM2
TWD2,476.00
Each
units
110 → 230V ac/dc 0.5 → 10s - Panel Mount Single - Harmony XB5 - External - 10A Screw 110V ac/dc 230V ac/dc
RS Stock No. 841-1580
Mfr. Part No.H5FKB
BrandOmron
TWD8,553.00
Each
units
100 → 240V ac - - - - 1 H5FKB - External SPNO 15A Screw - -
RS Stock No. 791-2711
Mfr. Part No.RE17RAMU
TWD1,333.00
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
New
RS Stock No. 220-2604
Mfr. Part No.700-HNK41AZ24
TWD1,846.00
Each
units
- - - - Multi Function - - - - - - - - -