TDR4A33 - TDR Series

Series: TDR
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The TDR Series of time-delay relays are comprised of digital circuitry and an isolated, 10A relay output. The on and off delays are selected by means of two, ten position binary switches, which allow the setting of the desired delay to be precise every time.


Operation (Recycling - ON Time First)
Upon application of input voltage, the green LED glows, the output relay is energized, the red LED glows, and the T1 ON time begins. At the end of the ON time, the output deenergizes, the red LED turns OFF and the T2, OFF time begins. At the end of the OFF time, the output relay energizes and the cycle repeats as long as input voltage is applied.
Reset: Removing input voltage resets the output and time delays, and returns the sequence to the first delay.


Operation (Recycling - OFF Time First)
Upon application of input voltage, the green LED glows, the T1 OFF time begins, the load is OFF. At the end of the OFF time, the T2 ON time begins, the load energizes, and the red LED glows. At the end of the ON time the load de-energizes and the red LED turns OFF. The cycle repeats until input voltage is removed.
Reset: Removing input voltage resets the output and the sequence to the OFF time.

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Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Property (Mouseover for details) Value
Input Voltage (V) 120 V ac
Input Tolerance (%) -20% - 10%
Input AC Line Frequency (Hz) 50/60
Output Type Electromechanical relay
Output Form DPDT
Output Load Rating (VA) 10 A resistive @ 120/240 V ac and 30 V dc; 1/3 hp @ 230 V ac
Time Delay Type Microcontroller
Time Delay Range ON time first: 10 - 10230 s in 10 s increments; OFF: 10 - 10230 s in 10 s increments
Recycle Time (ms) ≤500
Reset Time (ms) ≤150
Repeat Accuracy (%) ±0.1% or 20 ms whichever is greater
Setting Accuracy ≤±2% or 50 ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤±2%
Indication Input Green: LED on when input voltage is applied; Relay Red: LED ON when output relay energizes
Undervoltage Trip Voltage 230 s in 10 s increments; OFF: 10 - 10
Insulation Resistance ≥100
Life Electrical: 1 x 10⁵; Mechanical: 1 x 10⁷
Power Consumption ≤2 VA
Termination Type Octal 8-pin plug-in
Mounting Method Plug-in socket
Operating Temperature -20° to 60°C (-4° to 140°F)
Storage Temperature (F/C) -30° to 85°C (-22° to 185°F)
Dimensions 3.2 H x 2.4 W in. (81.3 x 60.7 mm)
Weight (lbs/g) 0 Kg
Dimensions 3.2 H x 2.4 W in. (81.3 x 60.7 mm)

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