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. 456-0348
Mfr. Part No.1SBN020010R1004
BrandABB
HK$517.19
Each
units
380 → 440 V ac 0.8 → 60 s Star Delta DIN Rail Single - - Seconds External - 4 A Screw - 230 V ac
RS Stock No. 746-7028
Mfr. Part No.1SVR730180R0300
BrandABB
HK$782.80
Each
units
24 → 240 V ac/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. 489-7173
Mfr. Part No.1SVR500110R0000
BrandABB
HK$531.66
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Seconds External SPDT 6 A Screw 12 V 250 V
RS Stock No. 185-097
Mfr. Part No.1SVR500110R0100 - CT-AHD.22
BrandABB
HK$868.28
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. 442-9297
Mfr. Part No.1SVR550029R8100
BrandABB
HK$597.40
Each
units
24 → 240 V ac/dc 0.05 s → 100 h Flash Start with OFF, Flash Start with ON, Impulse ON, OFF Delay, ON Delay, Pulse Former DIN Rail Multi Function 1 - Hours, Seconds External SPDT 4 A Screw - 250 V ac/dc
RS Stock No. 746-6993
Mfr. Part No.1SVR730040R3300
BrandABB
HK$628.30
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 Screw 12 V 300 V ac
RS Stock No. 442-9398
Mfr. Part No.1SVR550217R4100
BrandABB
HK$365.40
Each
units
24 V ac/dc, 200 → 240 V ac 0.3 → 30 s ON Delay DIN Rail Single 2 - Seconds External SPDT 4 A - - 250 V
RS Stock No. 442-9382
Mfr. Part No.1SVR550167R1100
BrandABB
HK$344.30
Each
units
24 V ac/dc, 200 → 240 V ac 0.1 → 10 s Flash DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 746-6987
Mfr. Part No.1SVR730020R3300
BrandABB
HK$839.21
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, Snap Multi Function 2 - Hours, Seconds External DPDT 4 A Screw 12 V 300 V ac
RS Stock No. 442-9304
Mfr. Part No.1SVR550107R5100
BrandABB
HK$318.60
Each
units
24 V ac/dc, 200 → 240 V ac 0.3 → 30 min ON Delay DIN Rail Single 1 - Minutes External SPDT 4 A - - 250 V
RS Stock No. 746-7043
Mfr. Part No.1SVR740020R0200
BrandABB
HK$998.76
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. 746-7053
Mfr. Part No.1SVR740030R3300
BrandABB
HK$998.76
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. 746-7065
Mfr. Part No.1SVR740100R0300
BrandABB
HK$707.18
Each
units
24 → 240 V ac/dc 0.05 s → 300 h ON Delay DIN Rail Single 2 - Hours, Seconds External DPDT 4 A Push In 12 V 300 V ac
RS Stock No. 442-9118
Mfr. Part No.1SVR550107R1100
BrandABB
HK$358.12
Each
units
24 V ac/dc, 200 → 240 V ac 0.1 → 10 s ON Delay DIN Rail Single 1 - Seconds External SPDT 4 A - - 250 V
RS Stock No. 746-7015
Mfr. Part No.1SVR730120R3300
BrandABB
HK$1,019.66
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 Screw 12 V 300 V ac
RS Stock No. 442-9310
Mfr. Part No.1SVR550111R4100 - CT-AHE
BrandABB
HK$444.60
Each
units
220 → 240 V ac 0.3 → 30 s OFF Delay DIN Rail Single 1 - Seconds External SPDT - - - -
RS Stock No. 489-7151
Mfr. Part No.1SVR500020R0000
BrandABB
HK$660.00
Each
units
24 → 240 V ac, 24 → 48 V 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 1 - Hours, Seconds External SPDT 6 A Screw 12 V 250 V
RS Stock No. 442-9354
Mfr. Part No.1SVR550127R4100
BrandABB
HK$534.91
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. 442-9168
Mfr. Part No.1SVR550019R0000
BrandABB
HK$538.53
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. 489-7195
Mfr. Part No.1SVR500150R0000
BrandABB
HK$458.38
Each
units
24 → 240 V ac, 24 → 48 V dc 0.05 s → 100 h Flash DIN Rail Single 1 - Hours, Seconds External SPDT 6 A Screw 12 V 250 V