Time Delay Relays
Multifunction
ASQU / ASTU SERIES
Description
The ASQU and ASTU Series of 17 mm, knob adjustable,
.5
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. Adjustment through the time range is accomplished by an
onboard knob.
The ASQU Series has quick connect terminals and the ASTU
Series has terminal blocks.
Features & Benefits
FEATURES
Universal AC or
DC voltage
Compact 17.5mm size
BENEFITS
Choose from 24 to 240VAC or 9 to 110VDC models
Allows for high rail density
Repeat Accuracy + / -1%
Reduce stocking requirements
Field adjustable delay ranging from 0.1s - 100m
Provides 100 million operations in typical conditions.
Each unit ships with both surface and DIN rail quick
mount adapters
Self monitoring and self correcting for
improved performance
Wiring & Adjustment Diagrams
DELAY-ON-MAKE & RECYCLING
L1
N/L2
Microcontroller based
Multifunction:
5 timing functions
Knob Adjustable
Time Delay
0.7A steady, 10A inrush
solid-state output
Mounting fasteners
Iincluded
Watchdog circuitry
ADJUSTMENTS
L1
N/L2
DOM A
B
A
SS B
R
A
B
DOB A
B
DOM = Delay-on-Make
SS = Single Shot/Interval
R = Recycling
DOB = Delay-on-Break
SINGLE SHOT, INTERVAL &
DELAY-ON-BREAK
L1
N/L2
L1
N/L2
Accessories
P1015-13
(AWG 10/12),
P1015-64
(AWG 14/16),
P1015-14
(AWG 18/22)
Female Quick Connect
These 0.25 in. (6.35 mm) female terminals are
constructed with an insulator barrel to provide
strain relief.
P0500-178 Surface Mount Adapter
P0500-179 DIN Rail Mount Adapter
For use with the ASxx/DSxx Series timers.
R
0.1-10s
1-100s
M
X1s
X10s
C
D
C
D
C
D
C
D
S
E
F
E
F
E
F
E
F
10-1000s X100s
1-100m
X10m
V = Voltage
L = Load
J= Wire Required for
Interval Operation
S1= Initiate Switch
UTL = Optional Untimed Load
R = Range
M = Multiplier
S = Setting
Ordering Information
MODEL
INPUT VOLTAGE
CONNECTION
ASQUA3
ASQUD3
ASTUA3
ASTUD3
24 to 240VAC
9 to 110VDC
Quick Connects
Quick Connects
Terminal Blocks
Terminal Blocks
24 to 240VAC
9 to 110VDC
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/asqu-astu
Rev: 1-A-062216
Time Delay Relays
Multifunction
ASQU / ASTU SERIES
Specifications
Time Delay
Type
Adjustment
Range*
Repeat Accuracy
Tolerance
(Factory Calibration)
Reset Time
Initiate Time
Time Delay vs Temp.
& Voltage
Input
Voltage
Microcontroller based with ceramic resonator
and watchdog circuitry
Knob with dial; 2 switches select
DIN Rail Mount
1 of 4 multipliers
0.1 - 10s, 1 - 100s, 10 - 1000s, 1 - 100m
±1% or ±50ms, whicheer is greater
35mm DIN 3
Mounting Diagrams
P0500-178
SURFACE MOUNT
Inches (Millimeters)
.38
(9.65
P0500-179
DIN RAIL MOUNT
Inches (Millimeters)
.185
(4.70)
Surface Mount
.235 DIA
(5.97)
2.41
Quick Mount (61.2)
Fastner(2)
[Drill . 187 (4.75)
diameter hole]
DIN Rail Mount
.38
(9.65
Surface Mo
.235 DI
(5.97)
35mm DIN 3
3.00
(76.2)
±2% or ±50ms, whichever is greater
32MM DIN 1
≤ 300ms
Single Shot & Delay-on-Break: ≤ 32ms
±2%, or ±50ms, whichever is greater
.815
(20.70)
3.00
(76.2)
32MM DIN 1
Quick Mount
Fastner(2)
[Drill . 187 (4.
diameter hole
AC: 24 to 240VAC; -20% - 10%
DC: 9 to 110VDC; -0% - 20% @ -25°C
Inches (Millimeters)
9.4 to 110VDC; -0% - 20% @ -40°C
AC Line Frequency/DC Ripple
50/60Hz / ≤ 10%
Output
Type
Solid state
Form
NO
Rating
0.7A steady state, 10A inrush
Voltage Drop
AC
≅
2.5V @ 0.7A; DC
≅
1.5V @ 0.7A
Protection
Surge
IEEE C62.41-1991 Level A
Circuitry
Encapsulated
Dielectric Breakdown
≥ 2000V RMS terminals to mounting surface
Polarity
DC units are reverse polarity protected
Mechanical
Mounting
Two base adaptors are available
DIN Rail
Snap on to 32 mm DIN 1 & 35 mm DIN 3 rail
Surface
Two #6 (M3.5 x 0.6) screws or quick
mount fasteners
Dimensions
H
76.2 mm (3.0”);
W
17.52 mm (0.69”);
D
61.2 mm (2.41”)
Termination
ASQU
0.25 in. (6.35 mm) male quick
connect terminals
ASTU
0.197 in. (5 mm) push-on terminal blocks for
up to #14 AWG (2.5 mm
2
) wire
Environmental
Operating/Storage
Temperature
-40° to 60°C / -40° to 85°C
Humidity
95% relative, non-condensing
Weight
≅
4 oz (113 g)
*For CE approved applications, power must be removed from the unit when a switch position
is changed.
.640
(16.26)
.69
(17.52)
.815
(20.70)
.640
(16.26)
Inches (Millimeters)
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/asqu-astu
Rev: 1-A-062216
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