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. 179-2949
BrandRS PRO
$60.79
Each
units
24 V dc 0.5 → 10 s On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 24 V dc
RS Stock No. 161-7605
BrandRS PRO
$100.36
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min Off Pulse, ON Pulse with Control Switch, ON Pulse without Control Switch, On-Off Pulse DIN Rail Multi Function 1 - Minutes, Seconds External - 8 A Screw 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2959
BrandRS PRO
$64.79
Each
units
230 V ac 0.5 → 10 s On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 230 V ac
RS Stock No. 161-7609
BrandRS PRO
$93.61
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min Asymmetrical Recycler with Pause Start, Asymmetrical Recycler with Pulse Start, Delay Pulse, OFF Pulse, ON Delay, ON Pulse, ON Pulse with Control Switch, One Shot Asymmetrical with Control Switch, One Shot Asymmetrical without Control Switch, Release Delay, Release True OFF Delay, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start Plug In Multi Function 2 - Minutes, Seconds External - 5 A 11-Pin Connector 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2944
BrandRS PRO
$60.79
Each
units
110 V ac 0.5 → 10 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2933
BrandRS PRO
$57.82
Each
units
230 V ac 0.1 → 3 min On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 179-2920
BrandRS PRO
$98.69
Each
units
220 V ac 0.1 s → 300 h B: ON-Delay, C: Signal ON/OFF Delay, D: Signal OFF Delay, E: Interval, F: Flicker ON Start, R: Flicker OFF Start Panel Mount, Plug-In Mount 6 2 - - - DPDT 5 A - - 220 V ac
RS Stock No. 179-2981
BrandRS PRO
$64.79
Each
units
24 V dc 1 → 30 s On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 179-2931
BrandRS PRO
$57.82
Each
units
230 V ac 1 → 30 s On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 230 V ac
RS Stock No. 178-5022
BrandRS PRO
$111.44
Each
units
- - - - - - - - - - - - - -
RS Stock No. 179-2940
BrandRS PRO
$60.79
Each
units
110 V ac 1 → 30 s On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 179-2986
BrandRS PRO
$64.79
Each
units
24 V dc 1 → 30 min On-Delay Plug-In Mount 1 4 - - - 4PDT 3 A - - 24 V dc
RS Stock No. 179-2912
BrandRS PRO
$264.16
Each
units
12 → 48 V dc 999.9 s Power On Delay Plug-In Mount 1 1 - - External SPDT 5 A - 12 V dc 48 V dc
RS Stock No. 161-7608
BrandRS PRO
$101.76
Each
units
10.5 → 265 V ac/dc 0.6 s → 60 min ON Delay, ON Pulse, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 2 - Minutes, Seconds External - 5 A Screw 10.5 V ac/dc 265 V ac/dc
RS Stock No. 179-2939
BrandRS PRO
$60.79
Each
units
110 V ac 0.5 → 10 s On-Delay Plug-In Mount 1 2 - - - DPDT 5 A - - 110 V ac
RS Stock No. 160-262
Mfr. Part No.E1ZMQ10 24-240V AC/DC
BrandTele
$76.51
Each
units
24 → 240 V ac/dc 50 ms → 100 h Flash Pause First, OFF Delay, ON Delay, One Shot Leading Edge Voltage Controlled DIN Rail Multi Function 1 E1ZMQ10 Hours, Milliseconds, Minutes, Seconds External SPDT 8 A - - 250 V ac
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
$70.80
Each
units
12 → 230 V ac/dc 0.1 s → 100 h Delay Off (DN), Delay On (DO), Delay On (DOb), Interval (IN), Interval Leading (INb), Interval Trailing (INa), Symmetrical Recycler OFF/ON (RF) DIN Rail 7 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS Stock No. 746-5176
Mfr. Part No.3RP1560-1SP30
BrandSiemens
$454.51
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. 113-8134
Mfr. Part No.H3CR-A AC100-240/DC100-125
BrandOmron
$124.17
Each
units
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, One Shot, Signal OFF Delay, Signal ON/OFF Delay DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 11-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 774-0308
Mfr. Part No.88827115
BrandCrouzet
$75.50
Each
units
24 → 240 V ac, 24 V dc 0.1 s → 100 h ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
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