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. 834-7509
Mfr. Part No.3RP1540-1BN31
BrandSiemens
MYR720.13
Each
units
200 → 240 V 0.05 → 600 s OFF Delay DIN Rail Single 2 - Seconds External DPDT 1 A Screw - -
RS Stock No. 328-386
Mfr. Part No.H3CR-A8E AC/DC24-48
BrandOmron
MYR380.21
Each
units
24 → 48 V ac/dc 0.05 s → 300 h Flicker ON Start, Interval, ON Delay, One Shot DIN Rail, Flush Mount, Surface Mount Multi Function 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 125 V dc, 250 V ac
RS Stock No. 812-7910
Mfr. Part No.PM4HW-H-AC240VW
BrandPanasonic
MYR381.35
Each
units
100 → 240 V ac 1 s → 500 h Cycle Flush Mount Dual Function 2 - Hours, Minutes, Seconds External DPDT 5 A 8-Pin Connector - -
RS Stock No. 349-771
Mfr. Part No.MDE20SRP30VDC
BrandTempatron
MYR193.64
Each
units
10 → 30 V dc 0.5 → 20 s ON Delay PCB Mount Single - - Seconds External - - - - -
RS Stock No. 113-8128
Mfr. Part No.H3CR-A AC24-48/DC12-48
BrandOmron
MYR362.89
Each
units
12 → 48 V dc, 24 → 48 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. 818-4563
Mfr. Part No.1CMDT0
BrandGIC
MYR129.41
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Accumulative Delay On Signal, Cyclic OFF/ON, Cyclic ON/OFF, Impulse ON/OFF, Leading Edge Bi-stable, Leading Edge Impulse, Signal OFF/ON, Signal ON/OFF Delay, Trailing Edge Impulse DIN Rail Multi Function 1 - Hours, Minutes, Seconds External SPDT 6 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 392-7239
Mfr. Part No.3RP1505-1AP30
BrandSiemens
MYR577.81
Each
units
24 V ac, 24 V dc, 200 → 240 V ac 0.5 → 10 s - - Multi Function - - Seconds External SPDT - Screw - -
RS Stock No. 746-5117
Mfr. Part No.3RP1505-1AQ30
BrandSiemens
MYR504.57
Each
units
24 V dc, 100 → 127 V ac 0.15 → 3 s - DIN Rail Multi Function 1 - Seconds External SPDT 1 (dc) A, 3 (ac) A Screw 24 V ac/dc 250 V dc, 400 V ac
RS Stock No. 341-373
Mfr. Part No.XM-D1
MYR276.16
Each
units
10.5 → 265 V ac/dc 0.6 → 60 min ON Delay, ON Pulse, Symmetrical Recycler with Pause Start, Symmetrical Recycler with Pulse Start DIN Rail Multi Function 1 XM-D1 Minutes External SPDT 8 A Screw 10.5 V ac/dc, 24 V dc 265 V ac/dc
RS Stock No. 798-3514
Mfr. Part No.V2ZM10 12-240V AC/DC
BrandTele
MYR281.32
Each
units
12 → 240 V ac/dc 0.05 → 1 s, 0.15 → 3 s, 0.5 → 10 h, 0.5 → 10 min, 0.5 → 10 s, 1.5 → 30 s, 3 → 60 min, 3 → 60 s, 5 → 100 h, 9 → 180 s Interval DIN Rail Multi Function 1 V2ZM10 - Internal SPDT 0.1 (DC-13) A, 1.5 (AC-15) A, 8 (AC-1) A, 8 (DC-12) A Screw - -
RS Stock No. 358-7156
Mfr. Part No.BC7932N.81 AC/DC24V + AC230V 0.5-10S
BrandDold
MYR215.37
Each
units
24 V ac/dc, 230 V ac 0.5 → 10 s Flash DIN Rail Single 1 BC7932N Seconds External SPDT 3 A Screw - 230 V ac
RS Stock No. 188-4584
Mfr. Part No.H3CR-F8 AC100-240
BrandOmron
MYR503.79
Each
units
100 → 240 V ac 0.05 s → 30 h Flicker OFF DIN Rail, Flush Mount, Surface Mount Single 2 H3CR Hours, Seconds External - 5 A 8-Pin Connector - 30 V dc, 250 V ac
RS Stock No. 536-2779
BrandRS PRO
MYR134.99
Each
units
250 V ac 0 → 120 min - Panel Mount - - - - External - - - - -
RS Stock No. 914-5070
Mfr. Part No.RENF22R2MMW
MYR409.56
Each
units
12 → 240 V ac/dc 0.1 s → 100 h Multi Function with NFC DIN Rail Multi Function 2 Zelio Hours, Minutes, Seconds External DPDT 8 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 896-8695
Mfr. Part No.RE22R1KMR
MYR383.02
Each
units
24 → 240 V ac/dc 0.3 → 300 s OFF Delay DIN Rail Single 1 RE22 R1 Seconds External SPDT 5 A Screw 24 V ac/dc 240 V ac/dc
RS Stock No. 392-7188
Mfr. Part No.3RP1574-1NP30
BrandSiemens
MYR411.80
Each
units
200 → 240 V 1 → 20 s WYE Delta - Single 2 - Seconds External SPDT - Screw - -
RS Stock No. 831-6031
Mfr. Part No.3RP2525-1AW30
BrandSiemens
MYR319.25
Each
units
12 → 240 V ac/dc 0.05 s → 100 h ON Delay - Single 1 - Hours, Seconds - SPDT - Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 296-2376
Mfr. Part No.ETR4-70-A
BrandEaton
MYR807.57
Each
units
24 → 240 V ac/dc 0.05 s → 60 h Flash, Fleeting, OFF Delay, ON Delay, Pulse Former, Pulse Generator DIN Rail Multi Function 2 ETR4 Hours, Seconds External DPDT 6 A Screw 12 V ac/dc 240 V ac/dc
RS Stock No. 834-7515
Mfr. Part No.3RP2005-1BW30
BrandSiemens
MYR631.20
Each
units
24 → 240 V 0.05 s → 100 h Additive ON Delay With Control Signal, OFF Delay with Control Signal, OFF Delay/Instantaneous With Control Signal, ON Delay, ON Delay/Instantaneous Contact, ON Delay/OFF Delay/Instantaneous With Control Signal, Passing Break Contact With Control Signal, Passing Break Contact/Instantaneous With Control Signal, Passing Make Contact, Passing Make Contact/Instantaneous Contact, Pulse-Shaping /Instantaneous With Control Signal DIN Rail Multi Function 2 - Hours, Minutes, Seconds External DPDT 1 A Screw - -
RS Stock No. 225-8267
Mfr. Part No.ETR4-11-A
BrandEaton
MYR434.90
Each
units
24 → 240 V ac/dc 0.05 s → 60 h ON Delay DIN Rail Single 1 ETR4 Hours, Seconds External SPDT 3 A Screw 24 V ac/dc 240 V dc, 400 V ac
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