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. 328-358
Mfr. Part No.H3CR-A8 AC100-240/DC100-125
BrandOmron
MYR598.19
Each
units
100 → 125 V dc, 100 → 240V ac 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A - - 125 V dc, 250V ac
RS Stock No. 774-0301
Mfr. Part No.88827103
BrandCrouzet
MYR446.53
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 774-0323
Mfr. Part No.88827155
BrandCrouzet
MYR460.07
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Single 1 - Hours, Minutes, Seconds External SPDT 8A Screw - -
RS Stock No. 328-364
Mfr. Part No.H3CR-A8 AC24-48/DC12-48
BrandOmron
MYR618.48
Each
units
12 → 48 V dc, 24 → 48V ac 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A - - 125 V dc, 250V ac
RS Stock No. 896-8676
Mfr. Part No.RE22R2AMR
MYR503.02
Each
units
24 → 240V 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 → 300s - DIN Rail Single 2 RE22 R2 Hours, Minutes, Seconds External DPDT 8A Screw 24V ac/dc 240V ac/dc
RS Stock No. 687-6106
Mfr. Part No.H5CX-AD-N
BrandOmron
MYR1,161.72
Each
units
12 → 24V ac/dc 0.001 s → 9999h - Panel Mount Multi Function 1 H5CX Hours, Seconds External - - Screw - -
RS Stock No. 872-5805
Mfr. Part No.RE22R2AMU
MYR384.55
Each
units
24 → 240 V ac, 24V dc 0.1 s → 100h - DIN Rail Multi Function 4 RE22 R2 Hours, Minutes, Seconds External DPDT 8A Screw - -
RS Stock No. 791-2708
Mfr. Part No.RE17LAMW
MYR182.66
Each
units
24 → 240V ac/dc 0.1 s → 100h - DIN Rail Single - RE17 Hours, Minutes, Seconds - - 20A Screw 24V ac/dc 240V ac/dc
RS Stock No. 188-4629
Mfr. Part No.H3CRH8LAC200240M
BrandOmron
MYR537.19
Each
units
200 → 240V ac 0.05 → 12min - - Single 2 H3CR Minutes, Seconds External - 5A - - 30 V dc, 250V ac
RS Stock No. 812-7838
Mfr. Part No.PM4HS-H-24V
BrandPanasonic
MYR240.43
Each
units
24V ac/dc 1 s → 500h - - Single 2 - Hours, Minutes, Seconds External DPDT 5A - - -
RS Stock No. 828-5158
Mfr. Part No.LMMT 12-230V AC/DC
MYR165.96
Each
units
24 to 230 V ac/12 to 230V dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 8A Screw 24 Vac / 12V dc 265V ac/dc
RS Stock No. 397-1220
Mfr. Part No.H3DS-XL
BrandOmron
MYR223.72
Each
units
24 → 230V ac/dc 0.1 s → 120h - DIN Rail Single 1 H3DS Hours, Seconds External - - Screw - -
RS Stock No. 113-8134
Mfr. Part No.H3CR-A AC100-240/DC100-125
BrandOmron
MYR410.85
Each
units
100 → 125 V dc, 100 → 240V ac 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A 11-Pin Connector - 125 V dc, 250V ac
RS Stock No. 759-6643
Mfr. Part No.83.02.0.240.0000
BrandFinder
MYR537.52
Each
units
24 → 240V ac/dc - - DIN Rail Multi Function 2 83 Series Days, Hours, Minutes, Seconds External SPDT 12A - 16.8V ac/dc -
RS Stock No. 260-448
Mfr. Part No.XM-D2
MYR255.80
Each
units
10.5 → 265V ac/dc 0.6 → 60min - DIN Rail Multi Function 2 XM-D2 Minutes External DPDT 8A Screw 10.5 V ac/dc, 24V dc 265V ac/dc
RS Stock No. 896-6813
BrandRS PRO
MYR137.61
Each
units
12 → 240V ac/dc 0.1 s → 100h - DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 6A Screw 12V ac/dc 240V ac/dc
RS Stock No. 328-386
Mfr. Part No.H3CR-A8E AC/DC24-48
BrandOmron
MYR485.86
Each
units
24 → 48V ac/dc 0.05 s → 300h - - Multi Function 2 H3CR Hours, Seconds External - 5A - - 125 V dc, 250V ac
RS Stock No. 812-7917
Mfr. Part No.PM4HS-H-DC12V
BrandPanasonic
MYR236.06
Each
units
12V dc 1 s → 500h - - Single 2 - Hours, Minutes, Seconds External DPDT 5A - - -
RS Stock No. 812-7910
Mfr. Part No.PM4HW-H-AC240VW
BrandPanasonic
MYR485.04
Each
units
100 → 240V ac 1 s → 500h - - Dual Function 2 - Hours, Minutes, Seconds External DPDT 5A - - -
RS Stock No. 812-7967
Mfr. Part No.PM4HS-H-DC12VW
BrandPanasonic
MYR236.06
Each
units
12V dc 1 s → 500h - - Single 2 - Hours, Minutes, Seconds External DPDT 5A - - -