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. 746-7003
Mfr. Part No.1SVR730100R3300 CT-ERS.22S
BrandABB
TWD3,107.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 220-2604
Mfr. Part No.700-HNK41AZ24
TWD1,846.00
Each
units
- - - - Multi Function - - - - - - - - -
RS Stock No. 825-4577
Mfr. Part No.H3CR-F AC100-240/DC100-125
BrandOmron
TWD3,477.00
Each
units
100 → 125 V dc, 100 → 240V ac 0.05 s → 30h - - Single 2 H3CR Hours, Minutes, Seconds External DPDT 5A PCB Pin 100 V ac, 100V dc 125 V dc, 240V ac
RS Stock No. 160-206
Mfr. Part No.G2ZM20 12-240VAC/DC
BrandTele
TWD3,699.00
Each
units
12 → 240V ac/dc 50 ms → 100h - DIN Rail Multi Function 2 G2ZM20 Hours, Milliseconds, Minutes, Seconds External DPDT 5A - - 250V ac
RS Stock No. 905-3476
Mfr. Part No.TMST
BrandLovato
TWD2,287.00
Each
units
24 → 240 V ac, 24 → 48V dc - - DIN Rail Single 2 - Minutes, Seconds External DPNO 8A Screw - -
RS Stock No. 896-6857
BrandRS PRO
TWD1,756.00
Each
units
24 → 240V ac/dc 3 → 120s - DIN Rail Single 2 - Seconds External SPNO 5A Screw 24V ac/dc 240V ac/dc
RS Stock No. 699-7067
Mfr. Part No.7PV1518-1AW30
BrandSiemens
TWD1,860.00
Each
units
12 → 240V ac/dc 0.05 → 100 s, 3 → 100 min, 5 → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT - Screw - 250V ac/dc
RS Stock No. 144-5920
Mfr. Part No.DRTA06D06
TWD2,183.00
Each
units
12 → 24V ac/dc 0.1 s → 100h - DIN Rail Single 2 SeriesOneDR Hours, Minutes, Seconds External SPNO 6A Screw 12V ac/dc 24V ac/dc
New
RS Stock No. 220-2651
Mfr. Part No.700-HTA1A2
TWD3,306.00
Each
units
240V ac - - - - 1 - - - - - - - -
RS Stock No. 171-8301
Mfr. Part No.7PV1518-1AJ30
BrandSiemens
TWD1,960.00
Each
units
90 → 127V ac/dc 0.05 → 360000s - DIN Rail Multi Function 1 - Seconds External 1CO 3A Screw 90V ac/dc 127V ac/dc
RS Stock No. 832-5455
Mfr. Part No.GT3A-5EAF20
BrandIdec
TWD2,223.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 178-5029
BrandRS PRO
TWD2,266.00
Each
units
12 → 240V ac/dc - - DIN Rail Multi Function 4 - Days, Hours, Minutes, Seconds External 4PDT 8A Screw 12V ac/dc -
RS Stock No. 236-1240
Mfr. Part No.H3RN2AC24
BrandOmron
TWD1,880.00
Each
units
24V ac 0.1 min → 10h - Chassis Mount Multi Function 2 H3RN Hours, Minutes External - 3A Socket - 250V ac
RS Stock No. 857-7191
Mfr. Part No.DMB01CM24
TWD4,335.00
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Multi Function 2 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 877-8102
Mfr. Part No.2901486
TWD2,949.00
Each
units
- 3 → 300s - DIN Rail Single 2 ETD-BL-1T-OFF-CC-300S-PT Seconds External SPDT - Screw 19.2V dc 30V dc
RS Stock No. 914-8205
Mfr. Part No.REXL2TMJD
TWD2,040.00
Each
units
12V dc 0.1 s → 100h - Plug In Multi Function - - Hours, Minutes, Seconds - - 5A - - -
RS Stock No. 746-7006
Mfr. Part No.1SVR730100R0300 CT-ERS.21S
BrandABB
TWD3,576.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 179-2908
BrandRS PRO
TWD5,118.00
Each
units
100 → 240V ac 999.9s - Plug In - 8 - - - SPDT 5A - 100V ac 240V ac
RS Stock No. 177-0091
Mfr. Part No.H3CR-HRL AC200-240 M
BrandOmron
TWD3,405.00
Each
units
200 → 240V ac 0.05 → 12s - DIN Rail Multi Function 2 H3CR Minutes, Seconds External DPDT 5A Crimp 200V ac 240V ac
RS Stock No. 798-3520
Mfr. Part No.V2ZR10 24-240V AC/DC
BrandTele
TWD1,653.00
Each
units
24 → 240V ac/dc 0.05 → 1 s, 0.15 → 3 s, 0.5 → 10 h, 0.5 → 10 min, 0.5 → 10 s, 1.5 → 30 s, 3 → 60 min, 3 → 60 s, 5 → 100 h, 9 → 180s - DIN Rail Single 1 V2ZR10 - Internal SPDT - Screw - -