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. 456-0310
Mfr. Part No.1SBN020010R1001
BrandABB
TWD2,750.00
Each
units
24 V ac/dc 0.8 → 8 s, 6 → 60 s ON Delay DIN Rail Single - - Seconds External - 5 A Screw 24 V ac 240 V ac
RS Stock No. 783-4005
Mfr. Part No.1SVR730180R3100
BrandABB
TWD3,397.00
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. 185-097
Mfr. Part No.1SVR500110R0100 - CT-AHD.22
BrandABB
TWD3,739.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h OFF Delay DIN Rail Single 2 - Hours, Seconds External DPDT 6 A - 12 V 250 V
RS Stock No. 746-7090
Mfr. Part No.1SVR730180R3100
BrandABB
TWD3,234.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h OFF Delay DIN Rail Single 1 - Hours, Seconds External SPDT 4 A Push In 12 V 300 V ac
RS Stock No. 746-6971
Mfr. Part No.1SVR730010R3200
BrandABB
TWD3,403.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7097
Mfr. Part No.1SVR740211R2300
BrandABB
TWD3,518.00
Each
units
380 → 440 V ac 0.05 s → 10 min Star Delta Changeover DIN Rail Single 2 - Minutes, Seconds External DPNO 4 A Push In 12 V 300 V ac
RS Stock No. 185-491
Mfr. Part No.1SVR430261R6000
BrandABB
TWD2,665.00
Each
units
100 → 127 V ac 0.05 s → 300 h OFF Delay DIN Rail Single - - Hours, Seconds External - 4 A Screw - 250 V
RS Stock No. 442-9168
Mfr. Part No.1SVR550019R0000
BrandABB
TWD2,594.00
Each
units
24 → 240 V ac/dc 0.1 → 300 s Flash Start with OFF, Flash Start with ON, Impulse ON, ON Delay DIN Rail Multi Function - - Seconds External Solid State Output - - - -
RS Stock No. 746-7043
Mfr. Part No.1SVR740020R0200
BrandABB
TWD5,097.00
Each
units
24 → 240 V ac/dc 0.05 s → 300 h Accumulative ON Delay, Flash Start with OFF, Flash Start with ON, Impulse OFF with Auxiliary Voltage, Impulse ON, OFF Delay with Auxiliary Voltage, ON Delay, Pulse Former, Star Delta Changeover with Impulse, Symmetrical OFF Delay, Symmetrical ON Delay DIN Rail Multi Function 2 - Hours, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 746-6999
Mfr. Part No.1SVR730030R3300
BrandABB
TWD4,951.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 746-7093
Mfr. Part No.1SVR740210R3300
BrandABB
TWD3,045.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 10 min Star Delta Changeover DIN Rail Single 2 - Minutes, Seconds External DPNO 4 A Push In 12 V 300 V ac
RS Stock No. 746-7021
Mfr. Part No.1SVR730180R3300
BrandABB
TWD3,507.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h OFF Delay DIN Rail Single 2 - Hours, Seconds External DPDT 4 A Screw 12 V 300 V ac
RS Stock No. 746-7107
Mfr. Part No.CT-MFD.21
BrandABB
TWD3,744.00
Each
units
12 → 24 V ac/dc 0.05 s → 100 h Flash Start with OFF, Flash Start with ON, Impulse OFF with Auxiliary Voltage, Impulse ON, OFF Delay with Auxiliary Voltage, ON Delay, Pulse Former DIN Rail Multi Function 2 - Hours, Seconds External DPDT 5 A Screw 12 V 250 V ac
New
RS Stock No. 210-4297
Mfr. Part No.1SVR508160R0100
BrandABB
TWD2,293.00
Each
units
24 - 240 V ac 0.05 s - 100 h Pulse Generator Din Rail Mount, Snap-In - 2 CT-C - Internal - - Screw Terminals 24 Vac 240 Vac
New
RS Stock No. 210-4298
Mfr. Part No.1SVR508210R0100
BrandABB
TWD1,879.00
Each
units
24 - 240 V ac 0.05 s - 10 min Star-delta Din Rail Mount, Snap-In - 2 CT-C - Internal - - Screw Terminals 24 Vac 240 Vac
RS Stock No. 746-7025
Mfr. Part No.1SVR730180R3100
BrandABB
TWD3,141.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h OFF Delay DIN Rail Single 1 - Hours, Seconds External SPDT 4 A Screw 12 V 300 V ac
RS Stock No. 746-7056
Mfr. Part No.1SVR740020R3300
BrandABB
TWD4,500.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h Accumulative ON Delay, Flash Start with OFF, Flash Start with ON, Impulse OFF with Auxiliary Voltage, Impulse ON, OFF Delay with Auxiliary Voltage, ON Delay, Pulse Former, Star Delta Changeover with Impulse, Symmetrical OFF Delay, Symmetrical ON Delay DIN Rail Multi Function 2 - Hours, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 746-7003
Mfr. Part No.1SVR730100R3300
BrandABB
TWD3,047.00
Each
units
24 → 48 V dc - - DIN Rail - - - - - - - - - -
New
RS Stock No. 210-4294
Mfr. Part No.1SVR508130R0000
BrandABB
TWD1,540.00
Each
units
24-240 V ac 0.05 s - 100 h Impulse-ON Din Rail Mount, Snap-In - - CT-C - Internal - - Screw Type 24 Vac 240 Vac
RS Stock No. 746-7047
Mfr. Part No.1SVR740020R3100
BrandABB
TWD3,924.00
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 300 h Accumulative ON Delay, Flash Start with OFF, Flash Start with ON, Impulse OFF with Auxiliary Voltage, Impulse ON, OFF Delay with Auxiliary Voltage, ON Delay, Pulse Former, Symmetrical OFF Delay, Symmetrical ON Delay DIN Rail Multi Function 1 - Hours, Seconds External SPDT 4 A Push In 12 V 300 V ac