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. 699-7058
Mfr. Part No.7PV1508-1AW30
BrandSiemens
R 685.00
Each
units
12 → 240 V ac/dc 0.05 → 100 s, 3 → 100 min, 5 → 100 h Additive ON Delay with Auxiliary Voltage, Flash Start with Interval, OFF Delay with Auxiliary Voltage, ON Delay, Passing Break Contact with Auxiliary Voltage, Passing Make Contact, Pulse Former with Auxiliary Voltage DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 1 (dc) A, 3 (ac) A Screw - 250 V ac/dc
RS stock no. 392-7239
Mfr. Part No.3RP1505-1AP30
BrandSiemens
R 1,670.00
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.5 → 10 s - - Multi Function - - Seconds External SPDT - Screw - -
RS stock no. 746-5117
Mfr. Part No.3RP1505-1AQ30
BrandSiemens
R 1,670.00
Each
units
24 V dc, 100 → 127 V ac 0.15 → 3 s - DIN Rail Multi Function 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 392-7223
Mfr. Part No.3RP1505-1BP30
BrandSiemens
R 2,554.11
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.5 → 10 s - - Multi Function - - Seconds External DPDT - Screw - -
RS stock no. 746-5110
Mfr. Part No.3RP1505-1AW30
BrandSiemens
R 1,870.00
Each
units
24 → 240 V ac/dc 1.5 → 30 s - DIN Rail Multi Function 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 834-7473
Mfr. Part No.3RP1512-1AP30
BrandSiemens
R 885.00
Each
units
200 → 240 V 1.5 → 30 s ON Delay DIN Rail Single 1 - Seconds External SPDT 1 A Screw - -
RS stock no. 746-5173
Mfr. Part No.3RP1555-1AP30
BrandSiemens
R 2,140.00
Each
units
24 V ac/dc, 200 → 240 V ac 0.5 → 10 s Clock Pulse DIN Rail Single 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 834-7470
Mfr. Part No.3RP1511-2AP30
BrandSiemens
R 900.00
Each
units
200 → 240 V 0.5 → 10 s ON Delay DIN Rail Multi Function 1 - Seconds External SPDT 1 A Cage Clamp - -
RS stock no. 392-7188
Mfr. Part No.3RP1574-1NP30
BrandSiemens
R 1,534.74
Each
units
200 → 240 V 1 → 20 s WYE Delta - Single 2 - Seconds External SPDT - Screw - -
RS stock no. 746-5176
Mfr. Part No.3RP1560-1SP30
BrandSiemens
R 2,040.00
Each
units
24 V ac/dc, 200 → 240 V ac 1 → 20 s WYE Delta DIN Rail Single 3 - Seconds External 3PNO 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 392-7201
Mfr. Part No.3RP1525-1AP30
BrandSiemens
R 1,140.00
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.15 → 3 s ON Delay - Single - - Seconds External SPDT - Screw - -
RS stock no. 831-6063
Mfr. Part No.3RP2574-1NW30
BrandSiemens
R 832.00
Each
units
12 → 240 V ac/dc 1 → 20 s Star Delta - Single 2 - Seconds - DPNO - Screw 12 V ac/dc 240 V ac/dc
RS stock no. 746-5158
Mfr. Part No.3RP1540-1AB31
BrandSiemens
R 1,930.00
Each
units
24 V ac/dc 0.05 → 1 s OFF Delay DIN Rail Single 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 746-5170
Mfr. Part No.3RP1574-1NQ30
BrandSiemens
R 1,140.00
Each
units
24 V dc, 100 → 127 V ac 1 → 20 s WYE Delta DIN Rail Single 2 - Seconds External SPNO 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 746-5136
Mfr. Part No.3RP1525-1AQ30
BrandSiemens
R 1,140.00
Each
units
24 V dc, 100 → 127 V ac 0.05 → 1 s ON Delay DIN Rail Single 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 470-7929
Mfr. Part No.3RP2025-1AQ30
BrandSiemens
R 1,042.74
Each
units
24 V ac/dc, 100 → 127 V ac 0.05 → 100 h, 0.05 → 100 min, 0.05 → 100 s ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 1 (dc) A, 3 (ac) A Screw - 250 V ac/dc
RS stock no. 834-7486
Mfr. Part No.3RP1525-1BW30
BrandSiemens
R 1,660.00
Each
units
24 → 240 V 0.05 s → 100 h ON Delay DIN Rail Single 2 - Hours, Minutes, Seconds External DPDT 1 A Screw - -
RS stock no. 746-5145
Mfr. Part No.3RP1525-1BP30
BrandSiemens
R 1,270.00
Each
units
24 V ac/dc, 200 → 240 V ac 0.05 → 1 min ON Delay DIN Rail Single 2 - Minutes External DPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS stock no. 834-7521
Mfr. Part No.7PV1513-1AP30
BrandSiemens
R 360.00
Each
units
200 → 240 V 5 → 100 s ON Delay DIN Rail Single 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw - -
RS stock no. 834-7509
Mfr. Part No.3RP1540-1BN31
BrandSiemens
R 2,230.00
Each
units
200 → 240 V 0.05 → 600 s OFF Delay DIN Rail Single 2 - Seconds External DPDT 1 A Screw - -