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庫存編號 236-1329
製造零件編號H3YN-21 DC12
BrandOmron
HK$359.81
單位
12 V dc 0.1 min → 10 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 2 H3YN Hours, Minutes External - 5 A Socket - 250 V ac
RS庫存編號 733-4937
製造零件編號H3DKHBSACDC2448
BrandOmron
HK$616.55
單位
24 → 48 V ac/dc 0.1 → 1.2 s, 1 → 12 s OFF Delay DIN Rail Single - H3DK Seconds - - 5 A - - 30 V dc, 250 V ac
RS庫存編號 825-4577
製造零件編號H3CR-F AC100-240/DC100-125
BrandOmron
HK$1,040.60
單位
100 → 125 V dc, 100 → 240 V ac 0.05 s → 300 h Flicker OFF Start DIN Rail, Flush Mount, Plug In Single 2 H3CR Hours, Minutes, Seconds External DPDT 5 A PCB Pin 100 V ac, 100 V dc 125 V dc, 240 V ac
RS庫存編號 828-5161
製造零件編號LESW 12-230V AC/DC
HK$320.30
單位
12 → 230 V ac/dc 0.1 s → 100 h OFF Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS庫存編號 746-7028
製造零件編號1SVR730180R0300
BrandABB
HK$782.80
單位
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庫存編號 106-6240
製造零件編號H3DT-F
BrandOmron
HK$618.20
單位
24 → 240 V ac/dc 0.1 s → 100 h Flicker OFF Start/Flicker ON Start DIN Rail Single 2 H3DT Hours, Minutes, Seconds External SPDT 5 A Screw - 30 V dc, 250 V ac
RS庫存編號 733-4959
製造零件編號H3DK-M2 AC/DC24-240
BrandOmron
HK$597.85
單位
24 → 240 V ac/dc 0.1 s → 1200 h Flicker OFF Start, Flicker ON Start, Interval, OFF Delay, ON Delay, ON/OFF Delay, One Shot Output DIN Rail Multi Function - H3DK Hours, Minutes, Seconds - - 5 A - - 30 V dc, 250 V ac
RS庫存編號 113-8134
製造零件編號H3CR-A AC100-240/DC100-125
BrandOmron
HK$502.23
單位
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庫存編號 825-4549
製造零件編號H3BA-N8H 110 VAC
BrandOmron
HK$825.65
單位
110 V ac 0.05 s → 300 h ON Delay Flush Mount, Panel Mount Single 1 H3BA Hours, Minutes, Seconds External SPDT 5 A PCB Pin 100 V ac 240 V ac
RS庫存編號 808-6620
BrandRS PRO
HK$364.89
單位
230 V ac - One Shot Panel Mount Single 1 - Minutes, Seconds External SPDT 50 mA - - 230 V ac
RS庫存編號 877-8076
製造零件編號2866174
HK$595.17
單位
- 50 ms → 100 h Switched Mode DIN Rail Single 2 ETD-SL-2T-I Hours, Milliseconds External DPDT - Screw 24 V dc 240 V dc
RS庫存編號 340-392
製造零件編號H3Y-4 DC24 10S
BrandOmron
HK$425.70
單位
24 V dc 0.5 → 10 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 250 V ac
RS庫存編號 825-4545
製造零件編號H3BA-N 110 VAC
BrandOmron
HK$869.11
單位
110 V ac 0.05 s → 300 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay, Signal OFF Delay, Signal ON/OFF Delay Flush Mount, Panel Mount Multi Function 2 H3BA Hours, Minutes, Seconds External DPDT 5 A PCB Pin 100 V ac 240 V ac
RS庫存編號 236-1458
製造零件編號H3YN-41 AC200-230
BrandOmron
HK$408.54
單位
200 → 230 V ac 0.1 min → 10 h Flicker OFF Start, Flicker ON Start, Interval, ON Delay DIN Rail, Flush Mount Multi Function 4 H3YN Hours, Minutes External - 3 A Socket - 250 V ac
RS庫存編號 340-601
製造零件編號H3Y-4 AC200-230 10S
BrandOmron
HK$348.07
單位
200 → 230 V ac 0.5 → 10 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 250 V ac
RS庫存編號 831-6003
製造零件編號3RP2505-1BW30
BrandSiemens
HK$1,201.74
單位
12 → 240 V ac/dc 1 s → 100 h Multi Function - Multi Function 2 - Hours, Minutes, Seconds - DPDT - Screw 12 V ac/dc 240 V ac/dc
RS庫存編號 774-0308
製造零件編號88827115
BrandCrouzet
HK$426.50
單位
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Delay DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS庫存編號 106-6239
製造零件編號H3DT-A2
BrandOmron
HK$486.87
單位
24 → 240 V ac/dc 0.1 s → 100 h ON Delay DIN Rail Single 4 H3DT - External DPDT 5 A Screw - 30 V dc, 250 V ac
RS庫存編號 896-8698
製造零件編號RE22R2KMR
HK$669.28
單位
24 → 240 V ac/dc 0.3 → 300 s OFF Delay DIN Rail Single 2 RE22 R2 Seconds External DPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS庫存編號 185-097
製造零件編號1SVR500110R0100 - CT-AHD.22
BrandABB
HK$629.00
單位
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