© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Multifunction
www.littelfuse.com/asqu-astu
Rev: 1-A-062216
0.1-10s
1-100s
10-1000s
1-100m
X100s
X10s
X1s
X10m
R M S
D
C
D
C
D
C
C
F
E
F
E
F
E
E
R = Range
M = Multiplier
S = Setting
Description
The ASQU and ASTU Series of 17.5 mm, knob 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. 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 BENEFITS
Universal AC or
DC voltage
Choose from 24 to 240VAC or 9 to 110VDC models
Compact 17.5mm size Allows for high rail density
Microcontroller based Repeat Accuracy + / -1%
Multifunction:
5 timing functions
Reduce stocking requirements
Knob Adjustable
Time Delay
Field adjustable delay ranging from 0.1s - 100m
0.7A steady, 10A inrush
solid-state output
Provides 100 million operations in typical conditions.
Mounting fasteners
Iincluded
Each unit ships with both surface and DIN rail quick
mount adapters
Watchdog circuitry
Self monitoring and self correcting for
improved performance
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.
Ordering Information
MODEL INPUT VOLTAGE CONNECTION
ASQUA3
24 to 240VAC
Quick Connects
ASQUD3
9 to 110VDC
Quick Connects
ASTUA3 24 to 240VAC Terminal Blocks
ASTUD3 9 to 110VDC Terminal Blocks
If you don’t find the part you need, call us for a custom product 800-843-8848
L1 N/L2
V = Voltage
L = Load
J= Wire Required for
Interval Operation
S1= Initiate Switch
UTL = Optional Untimed Load
DELAY-ON-MAKE & RECYCLING
SINGLE SHOT, INTERVAL &
DELAY-ON-BREAK
DOM
SS
R
DOB
A
A
A
A
B
B
B
B
ADJUSTMENTS
DOM = Delay-on-Make
SS = Single Shot/Interval
R = Recycling
DOB = Delay-on-Break
Wiring & Adjustment Diagrams
L1 N/L2
ASQU / ASTU SERIES
