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. 358-7077
Mfr. Part No.BC7930N.81 AC/DC24V + AC230V 0.5-10S
BrandDold
$77.24
Each
units
24 V ac/dc, 230 V ac 0.5 → 10 s Continuous DIN Rail Single 1 BC7930N Hours, Minutes, Seconds External SPDT 4 A - - 230 V ac
RS Stock No. 181-2811
Mfr. Part No.EF7666.24 AC50/60Hz 230V 0,15s-30h
BrandDold
$444.70
Each
units
230 V ac 0.15 s → 30 h Continuous Flush Mount Single 24 EF7666 Hours, Seconds - NO/NC (Delayed), NO/NC (Instantaneous) 3 A Flat - 230 V ac
RS Stock No. 358-7213
Mfr. Part No.BC7933N.81 AC/DC24V 5-100S
BrandDold
$86.62
Each
units
110 → 240 V ac 5 → 100 s Continuous DIN Rail Single 1 BC7933N Minutes, Seconds External SPDT 4 A - 110 V ac 240 V ac
RS Stock No. 465-0609
Mfr. Part No.IK7817N.81/200 AC/DC12-240V 0.02s-300h
BrandDold
$200.84
Each
units
12 → 240 V ac/dc 0.03 → 300 min, 0.06 → 30 s, 3 → 300 h Clock (TP), Delay (AV), Flash (BI), Fleeting (AW), Fleeting (EW), Make & Break, Pulse Delay (IE), Pulse Shaper (IF), Release Delay (AV/RV) DIN Rail Multi Function 1 IK7817N Hours, Minutes, Seconds External SPDT 4 A - 12 V ac/dc 240 V ac/dc
RS Stock No. 181-2807
Mfr. Part No.EF7616.24 AC50/60Hz 230V 0,15-1000s
BrandDold
$435.38
Each
units
230 V ac 15 → 1000 s Continuous Flush Mount Single 24 EF7616 Seconds External NO/NC (Delayed), NO/NC (Instantaneous) 3 A Screw - 230 V ac
RS Stock No. 358-6888
Mfr. Part No.BC7933N.81 AC/DC24V 0.5-10S
BrandDold
$86.62
Each
units
110 → 240 V ac 0.5 → 10 s Continuous DIN Rail Single 1 BC7933N Minutes, Seconds External SPDT 4 A - 110 V ac 12 V dc, 240 V ac
RS Stock No. 358-7099
Mfr. Part No.BC7931N.71 AC/DC24V + AC230V 0.05-1S
BrandDold
$94.07
Each
units
24 V ac/dc, 230 V ac 0.05 → 1 s Continuous DIN Rail Single 1 BC7931N Seconds External SPDT 4 A - - 230 V ac
RS Stock No. 358-7617
Mfr. Part No.BC7937N.81 AC/DC24V-240V 0.05S-300H
BrandDold
$190.78
Each
units
24 → 240 V ac/dc 0.05s → 300h Continuous DIN Rail Single 1 BC7937N Hours, Minutes, Seconds External SPDT 2 (dc) A, 3 (ac) A Screw 24 V ac 240 V ac/dc
RS Stock No. 181-2812
Mfr. Part No.EF7666.24 AC50/60Hz 230V 0,2s-60h
BrandDold
$464.32
Each
units
230 V ac 0.2 s → 60 h Continuous Flush Mount Single 24 EF7666 Hours, Seconds - NO/NC (Delayed), NO/NC (Instantaneous) 3 A Flat - 230 V ac
RS Stock No. 181-2778
Mfr. Part No.UG6961.02PS/100/61 DC24V 300s
BrandDold
$513.45
Each
units
24 V dc 300 s Continuous DIN Rail Multi Function 2 UG6961 Seconds - DPNO 2 A Screw - 24 V dc
RS Stock No. 358-7235
Mfr. Part No.BC7934N.81 AC/DC24V + AC230V 0.05S-16H
BrandDold
$93.47
Each
units
24 V ac/dc, 230 V ac 0.05 → 15 s, 0.2 → 15 min, 0.2 → 16 h Continuous DIN Rail Single 1 BC7934N Hours, Minutes, Seconds External SPDT 3 A Screw - 230 V ac
RS Stock No. 181-2809
Mfr. Part No.EF7666.24 AC50/60Hz 230V 0,15-1000s
BrandDold
$444.70
Each
units
230 V ac 15 → 1000 s Continuous Flush Mount Single 24 EF7666 Seconds - NO/NC (Delayed), NO/NC (Instantaneous) 3 A Flat - 230 V ac
RS Stock No. 358-7112
Mfr. Part No.BC7933N.81 AC/DC24V 3-60M
BrandDold
$80.11
Each
units
110 → 240 V ac 0.5 → 100 s, 0.5 → 60 min Continuous DIN Rail Single 1 BC7933N Minutes, Seconds External SPDT 4 A - 110 V ac 240 V ac
RS Stock No. 358-6872
Mfr. Part No.BC7933N.81 AC110-240V 0.5-10S
BrandDold
$85.98
Each
units
110 → 240 V ac 0.5 → 10 s Continuous DIN Rail Single 1 BC7933N Hours, Minutes, Seconds External SPDT 3 A Screw 110 V ac 240 V ac
RS Stock No. 181-2808
Mfr. Part No.EF7616.24 AC50/60Hz 230V 0,2s-60h
BrandDold
$459.07
Each
units
230 V ac 0.2 s → 60 h Continuous Flush Mount Single 24 EF7616 Hours, Seconds External NO/NC (Delayed), NO/NC (Instantaneous) 3 A Screw - 230 V ac
RS Stock No. 181-2777
Mfr. Part No.UG6960.04PS/100/61 DC24V 300s
BrandDold
$685.12
Each
units
24 V dc 300 s Continuous DIN Rail Multi Function 4 UG6960 Seconds - DPNO 2 A Screw - 24 V dc
RS Stock No. 424-9906
Mfr. Part No.MK7850N.82/200 AC/DC12-240V 0.02S-300H
BrandDold
$262.60
Each
units
12 → 240 V ac/dc 0.03 → 300 min, 0.06 → 30 s, 3 → 300 h Delay Pulse, Flash Start with Impulse, Fleeting ON Break, Fleeting ON Make, Operate Delay, Pulse Former, Release Delay DIN Rail Multi Function 2 MK7850N Hours, Minutes, Seconds External DPDT 1 (dc) A, 3 (ac) A - - 240 V ac/dc
RS Stock No. 500-3521
Mfr. Part No.EF7616.24 AC50/60HZ 230V 0.15S-30H
BrandDold
$379.12
Each
units
230 V ac 0.15 s → 30 h Continuous Panel Mount Single 2 EF7616 Hours, Seconds External SPDT 3 A - - 230 V ac
RS Stock No. 424-9912
Mfr. Part No.MK7850N.82/500 AC/DC12-240V 0.02S-300H
BrandDold
$293.71
Each
units
12 → 240 V ac/dc 0.03 → 300 min, 0.06 → 30 s, 3 → 300 h Delay (AV), Delay (RV), Flash (BI), Fleeting (AW), Fleeting (EW), Pulse Converter (IF), Pulse Delay (IE), Release Relay (AV/RV) DIN Rail Multi Function 2 MK7850N Hours, Minutes, Seconds External DPDT 4 A - 12 V ac/dc 240 V ac/dc
RS Stock No. 358-7178
Mfr. Part No.BC7935N.81 AC/DC24-240V 0.05S-300H
BrandDold
$131.44
Each
units
24 → 240 V ac/dc 0.5 → 10 s Flash Start with Impulse, Fleeting ON Break, Fleeting ON Make, Operate Delay, Operate/Release Delay, Pulse Delay, Pulse Former, Release Delay DIN Rail Multi Function 1 BC7935N Hours, Minutes, Seconds External SPDT 3 A Screw 24 V ac 240 V ac/dc