DSTUD3 - DSQU / DSTU Series

Littelfuse Multifunction Relays
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The DSQU and DSTU Series of 17.5 mm, switch adjustable, universal solid-state timers offer multiple functions, voltages, and time delay ranges. Choose one of 5 functions and 4 time delay ranges via 4 selection switches located on face of the unit. Six switches adjust the time delay through the selected range.


The DSQU Series has quick connect terminals and the DSTU Series has terminal blocks.

Property (Mouseover for details) Value
Input Voltage (V) 9 to 110VDC; 9.4 to 110VDC
Input Tolerance (%) 9 to 110VDC: -0% - 20% @-25oC; 9.4 to 110VDC: -0% - 20% @ -40oC
Input DC Ripple (%) ≤10%
Output Type Solid state
Output Form NO
Output Load Rating (VA) 0.7A steady state 10A inrush
Output Voltage Drop (V) 1.5V @ 0.7A
Time Delay Type Microcontroller based with ceramic resonator and watchdog circuitry
Time Delay Range x0.1s=0.1 - 6.3s in 0.1s increments; x1s/m=1 - 63s/m in 1s/m increments; x10s=10-63s in 10s increments
Reset Time (ms) ≤300ms
Initiate Time (ms) Single shot and delay-on-break: ≤32ms
Adjustment Type 6 switches adjust the time delay; 2 switches select 1 of 4 multipliers
Repeat Accuracy (%) ±0.1% or ±20ms whichever is greater
Setting Accuracy ±2% or ±50ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤ ±2% or 50ms whichever is greater
Surge Protection IEEE C62.41-1991 Level A
Dielectric Breakdown ≥2000V RMS terminals to mounting surface
Circuitry Encapsulated
Polarity DC units are reverse polarity protected
Termination Type 0.197 in (5mm) push-on terminal blocks for up to #14 AWG (2.5mm2) wire
Mounting Method DIN rail: Snap on to 32mm DIN 1 and 35mm DIN 3 rail; Surface: Two #6 (M3.5 x 0.6) screws or quick mount fasteners
Operating Temperature -40° to 60°C (-40°F to 140°F)
Storage Temperature (F/C) -40° to 85°C (-40°F to 185°F)
Humidity 95% relative non-condensing
Weight (lbs/g) ≅4.2oz (119g)
Sample capable No