TDMH120AL - TDM / TDMH / TDML Series

Littelfuse Delay on Make Relays
The TDM Series is a delay-on-make timer that combines accurate digital circuitry with isolated, DPDT relay contacts in an industry standard 8-pin plug-in package. DIP switch adjustment allows precise selection of the time delay over the full time delay range. The TDM Series is the product of choice for custom control panel and OEM designers.


Operation (Delay-on-Make)
Upon application of input voltage, the time delay begins. The output is de-energized before and during the time delay. At the end of the time delay, the output relay energizes and remains energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and output.

Property (Mouseover for details) Value
Input Voltage (V) 120VAC
Input Tolerance (%) -0.3
Input AC Line Frequency (Hz) 50/60Hz
Output Type Electromechanical relay
Output Form DPDT
Output Load Rating (VA) 10A resistive @ 120/240VAC and 28 VDC; 1/3hp @ 120/240VAC
Time Delay Type Digital integrated circuitry
Time Delay Range 10 - 10 230s in 10s increments
Recycle Time (ms) During timing: ≤500ms
Reset Time (ms) ≤50ms
Repeat Accuracy (%) ±2% or 50ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤ ±2%
Indication LED glows during timing; relay is de-energized
Isolation Voltage (V) ≥1500V RMS input to output
Life Mechanical - 1 x 107; Electrical - 1 x 106
Power Consumption ≤2.25W
Termination Type Octal 8-pin plug-in
Mounting Method Plug-in socket
Operating Temperature -20° t° 65°C (-4°F t° 149°F)
Storage Temperature (F/C) -30° t° 85°C (-22°F t° 185°F)
Dimensions 3.20 x 2.39 x 1.78 in. (81.3 x 60.7 x 45.2mm)
Weight (lbs/g) ≅6.0oz (170g)
Sample capable No