© 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

D

C

F

E

F

E

F

E

F

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

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

L1

N/L2

ASQU / ASTU SERIES