TDB24DL - TDB Series

Series: TDB
Questions? Contact Littelfuse Support
External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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.

Check Stock Order Samples

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) 24 V dc
Input Tolerance (%) -15% - 20%
Output Type Electromechanical relay
Output Form SPDT
Output Load Rating (VA) 10 A resistive @ 120/240 V ac and 28 V dc; 1/3 hp @ 120/240 V ac
Time Delay Type Digital
Time Delay Range 1 - 1023 s in 1 s increments
Recycle Time (ms) ≤150
Reset Time (ms) ≤50
Initiate Time (ms) ≤60
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 (%) ≤±5%
Indication LED indicates relay is energized
Undervoltage Trip Voltage 023 s in 1 s increments"
Polarity DC units are reverse polarity protected
Life Electrical: 1 x 10⁶; Mechanical: 1 x 10⁷
Power Consumption ≤3.25 W
Termination Type Octal 8-pin plug-in
Mounting Method Plug-in socket
Operating Temperature -20° to 65°C (-4° to 149°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)

To request product environmental information, please complete the Product Environmental Information Request Form.