Littelfuse Time Delay Relays
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The TDB Series combines accurate digital circuitry with isolated, 10A, DPDT or SPDT contacts in an 8 or 11-pin plug-in package. The TDB Series features DIP switch selectable time delays ranging from 0.1-10,230 seconds in three ranges. The TDB Series is the product of choice for custom control panel and OEM designers.

Operation (Delay-on-Break)
Input voltage must be applied to the input before and during timing. Upon closure of the initiate switch, the output relay is energized. The time delay begins when the initiate switch is opened (trailing edge triggered). The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied.
Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.

Property (Mouseover for details) Value
Input Voltage (V) 120VAC
Input Tolerance (%) -20% - 10%
Input AC Line Frequency (Hz) 50/60Hz
Output Type Electromechanical relay
Output Form SPDT
Output Load Rating (VA) 10A resistive @ 120/240VAC and 28VDC; 1/3hp @ 120/240VAC
Time Delay Type Digital integrated circuitry
Time Delay Range 0.1 - 102.3s in 0.1s increments
Recycle Time (ms) _150ms
Reset Time (ms) _50ms
Initiate Time (ms) _60ms
Repeat Accuracy (%) ±0.1% or 20ms whichever is greater
Setting Accuracy ±2% or 50ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) _ ±5%
Indication LED indicates relay is energized
Isolation Voltage (V) _1500V RMS input to output
Life Mechanical - 1 x 107; Electrical - 1 x 106
Power Consumption _3.25W
Termination Type Octal 8-pin
Mounting Method Plug-in socket
Operating Temperature -20o to 65oC (-4oF to 149oF)
Storage Temperature (F/C) -30o to 85oC (-22oF to 185oF)
Dimensions 3.20 x 2.40 x 1.80 in. (81.3 x 60.7 x 45.2mm)
Weight (lbs/g) _6.0oz (170g)
Sample Capable No
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