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 746-3883
製造零件編號H3CA-8H DC110
BrandOmron
HK$512.37
單位
110 V dc 0.1 s → 9990 h ON Delay DIN Rail, Flush Mount, Surface Mount Single 1 H3CA Hours, Seconds External - 3 A 8-Pin Socket - 250 V ac
RS庫存編號 791-2727
製造零件編號RE17RHMU
HK$308.75
單位
24 V dc, 24 → 240 V ac 0.1 s → 100 h ON Pulse DIN Rail Multi Function 1 RE17 Hours, Minutes, Seconds - SPDT 8 A Screw 24 V ac 24 V dc, 240 V ac
RS庫存編號 812-7888
製造零件編號PM4HS-H-AC240V
BrandPanasonic
HK$443.30
單位
100 → 240 V ac 1 s → 500 h Power ON Delay Flush Mount Single 2 - Hours, Minutes, Seconds External DPDT 5 A 8-Pin Connector - -
RS庫存編號 746-6987
製造零件編號1SVR730020R3300
BrandABB
HK$839.21
單位
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庫存編號 236-1357
製造零件編號H3YN-21 AC200-230
BrandOmron
HK$359.81
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 2 H3YN Hours, Minutes External - 5 A Socket - 250 V ac
RS庫存編號 896-6822
BrandRS PRO
HK$211.74
單位
24 V ac/dc, 240 V ac 0.3 s → 30 h OFF Delay DIN Rail Single 1 - Seconds External SPDT 5 A Screw - 24 V ac/dc, 240 V ac
RS庫存編號 746-5151
製造零件編號3RP1531-1AP30
BrandSiemens
HK$892.37
單位
24 V ac/dc, 200 → 240 V ac 0.5 → 10 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庫存編號 774-0301
製造零件編號88827103
BrandCrouzet
HK$487.19
單位
12 → 240 V ac/dc 0.1 s → 100 h Asymmetrical, Interval, OFF Delay, ON Delay, ON Pulse, Symmetrical DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw - -
RS庫存編號 340-544
製造零件編號H3Y-4 AC100-120 30S
BrandOmron
HK$377.22
單位
100 → 120 V ac 1 → 30 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 250 V ac
RS庫存編號 896-8670
製造零件編號RE22R1HMR
HK$525.97
單位
24 → 240 V ac/dc 0.05 → 1 s, 0.3 → 3 s, 1 → 10 s, 3 → 30 h, 3 → 30 min, 3 → 30 s, 10 → 100 s, 30 → 300 h, 30 → 300 min, 30 → 300 s Interval Delay DIN Rail Single 1 RE22 R1 Hours, Minutes, Seconds External SPDT 8 A Screw 24 V ac/dc 240 V ac/dc
RS庫存編號 828-5164
製造零件編號LART 12-230V AC/DC
HK$312.79
單位
12 → 230 V ac/dc 0.1 s → 100 h Off/On, Recycling On/Off DIN Rail Dual Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 265 V ac/dc
RS庫存編號 914-8192
製造零件編號REXL2TMBD
HK$453.94
單位
24 V dc 0.1 s → 100 h Electromechanical Plug In Multi Function 2 - Hours, Minutes, Seconds - - 5 A - - -
RS庫存編號 733-4956
製造零件編號H3DK-M1 AC/DC24-240
BrandOmron
HK$452.54
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 - SPDT 5 A Screw 24 V 30 V dc, 250 V ac
RS庫存編號 188-4613
製造零件編號H3CR-H8L AC/DC24 M
BrandOmron
HK$771.65
單位
24 V ac/dc 0.05 → 12 min OFF Delay DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Minutes, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS庫存編號 759-6652
製造零件編號83.62.0.240.0000
BrandFinder
HK$848.56
單位
24 → 240 V ac/dc 0.05-180 s Power OFF Delay DIN Rail Single 2 83 Series Seconds External SPDT 8 A - 16.8 V ac/dc 265/242 V ac / V dc
RS庫存編號 896-6826
BrandRS PRO
HK$305.49
單位
12 → 240 V ac/dc 0.1 s → 100 h Asymmetric OFF/ON, Asymmetric ON/OFF DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS庫存編號 340-623
製造零件編號H3Y-4 AC200-230 60S
BrandOmron
HK$408.50
單位
200 → 230 V ac 2 → 60 s ON Delay DIN Rail, Surface Mount Single 4 H3Y-4 Seconds External - 5 A - - 250 V ac
RS庫存編號 160-228
製造零件編號G2ZMF11 24-240VAC/DC
BrandTele
HK$796.60
單位
24 → 240 V ac/dc 50 ms → 30 days Flash Pause First, Flash Pulse First, OFF Delay with Control Input, ON Delay, ON Delay with Control Contact, One Shot Leading Edge Voltage Controlled, One Shot Leading Edge with Control Input, One Shot Trailing Edge with Control Input DIN Rail Multi Function 2 G2ZMF11 Days, Hours, Milliseconds, Minutes, Seconds External DPDT 5 A - - 250 V ac
RS庫存編號 746-6993
製造零件編號1SVR730040R3300
BrandABB
HK$628.30
單位
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庫存編號 684-3664
製造零件編號2917421
HK$351.94
單位
19.2 → 30 V dc 3 → 300 s ON Delay with Control Contact DIN Rail Single 1 ETD-BL-1T-ON-CC-300S Seconds External - 6.3 A Screw - -