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. 489-7173
Mfr. Part No.1SVR500110R0000
BrandABB
€67.53
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7003
Mfr. Part No.1SVR730100R3300
BrandABB
€80.46
Each
units
24 → 48 V dc - - DIN Rail - - - - - - - - - -
RS Stock No. 442-9332
Mfr. Part No.1SVR550118R4100
BrandABB
€55.48
Each
units
24 V ac/dc 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 185-104
Mfr. Part No.1SVR500160R0100 - CT-TGD.22
BrandABB
€77.29
Each
units
- - - - - - - - - - - - - -
RS Stock No. 442-9310
Mfr. Part No.1SVR550111R4100 - CT-AHE
BrandABB
€55.48
Each
units
220 → 240 V ac 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 185-110
Mfr. Part No.1SVR500210R0100 - CT-SAD.22
BrandABB
€65.92
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 10 min Star Delta DIN Rail Single 2 - Minutes, Seconds External DPNO 6 A - 12 V 250 V
RS Stock No. 442-9326
Mfr. Part No.1SVR550118R1100
BrandABB
€55.48
Each
units
24 V ac/dc 0.1 → 10 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 746-7107
Mfr. Part No.CT-MFD.21
BrandABB
€98.86
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7075
Mfr. Part No.1SVR740120R3300
BrandABB
€137.08
Each
units
24 → 240 V ac/dc 0.05 s → 10 min OFF Delay without Auxiliary Voltage DIN Rail Single 2 - Minutes, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 746-6971
Mfr. Part No.1SVR730010R3200
BrandABB
€113.76
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7053
Mfr. Part No.1SVR740030R3300
BrandABB
€134.59
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h Asymmetrical Recycler with Pulse Start DIN Rail Multi Function 2 - Hours, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 185-081
Mfr. Part No.1SVR500100R0100 - CT-ERD.22,1SVR5001
BrandABB
€65.92
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h ON Delay DIN Rail Single 2 - Hours, Seconds External DPDT 6 A - 12 V 250 V
RS Stock No. 442-9354
Mfr. Part No.1SVR550127R4100
BrandABB
€65.92
Each
units
24 V ac/dc, 200 → 240 V ac 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 746-6977
Mfr. Part No.1SVR730010R0200
BrandABB
€130.72
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7006
Mfr. Part No.1SVR730100R0300
BrandABB
€92.61
Each
units
- - - - - - - - - - - - - -
RS Stock No. 442-9118
Mfr. Part No.1SVR550107R1100
BrandABB
€41.91
Each
units
200 → 240 V ac, 24 V ac/dc 0.1 → 10 s ON Delay DIN Rail Single 1 - Seconds External SPDT 4 A - - 250 V
RS Stock No. 783-4005
Mfr. Part No.1SVR730180R3100
BrandABB
€89.70
Each
units
- 0.05 s → 300 h OFF Delay DIN Rail Single 1 - Hours, Seconds - SPDT 50 mA Screw 24 V ac/dc 48 V dc, 240 V ac
RS Stock No. 746-7062
Mfr. Part No.1SVR740040R3300
BrandABB
€86.64
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h Adjustable Impulse with Fixed Time Relay, Fixed Impulse with Adjustable Time Relay, Flash Start with OFF, Flash Start with ON, Impulse ON, ON Delay DIN Rail Multi Function 2 - Hours, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 489-7167
Mfr. Part No.1SVR500100R0000
BrandABB
€61.68
Each
units
- - - - - - - - - - - - - -
RS Stock No. 456-0326
Mfr. Part No.1SBN020010R1002
BrandABB
€72.65
Each
units
110 → 120 V ac 0.8 → 60 s Star Delta DIN Rail Single - - Seconds External - 4 A Screw - 230 V ac