© 2016 Littelfuse Protection Relays & Controls

Time Delay Relays

Multifunction

www.littelfuse.com/asqu-astu

Rev: 1-A-062216

ASQU / ASTU SERIES

Specifications

Time Delay

Type

Microcontroller based with ceramic resonator

and watchdog circuitry

Adjustment

Knob with dial; 2 switches select

1 of 4 multipliers

Range*

0.1 - 10s, 1 - 100s, 10 - 1000s, 1 - 100m

Repeat Accuracy

±1% or ±50ms, whicheer is greater

Tolerance

(Factory Calibration)

±2% or ±50ms, whichever is greater

Reset Time

≤ 300ms

Initiate Time

Single Shot & Delay-on-Break: ≤ 32ms

Time Delay vs Temp.

& Voltage

±2%, or ±50ms, whichever is greater

Input

Voltage

AC: 24 to 240VAC; -20% - 10%

DC: 9 to 110VDC; -0% - 20% @ -25°C

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 mm2) 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.

DIN Rail Mount

Inches (Millimeters)

Surface Mount

Quick Mount

Fastner(2)

[Drill . 187 (4.75)

diameter hole]

35mm DIN 3

32MM DIN 1

.815

(20.70)

.640

(16.26)

.38

(9.65

.185

(4.70)

3.00

(76.2)

2.41

(61.2)

.235 DIA

(5.97)

.69

(17.52)

P0500-178

SURFACE MOUNT

Inches (Millimeters)

P0500-179

DIN RAIL MOUNT

Inches (Millimeters)

Mounting Diagrams

DIN Rail Mount

Inches (Millimeters)

Surface Mount

Quick Mount

Fastner(2)

[Drill . 187 (4.75)

diameter hole]

35mm DIN 3

32MM DIN 1

.815

(20.70)

.640

(16.26)

.38

(9.65

.185

(4.70)

3.00

(76.2)

2.41

(61.2)

.235 DIA

(5.97)

.69

(17.52)