General Note

IRC reserves the right to make changes in product specification without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print.

A subsidiary of

TT electronics plc

• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Low Cost Semi-Precision

Power Wirewound Resistor

LAS Series

Electrical Data

IRC

Type

Power Rating 275°C

Max. Hot Spot

Commercial Range

(ohms)

Non-Inductive Range

(ohms)

Available Resistance

(ohms)

125°C

25°C

Min.

Max.

Min.

Max.

0.5%, 1%

3%, 5%

LAS-1

1

2

0.1

7.5K

0.1

3.8K

1 - 7.5K

0.1 - 7.5K

LAS-3

2

3

0.1

18K

0.2

7.5K

1 - 18K

0.1 - 18K

Test Condition (@ 25°C)

Max

∆R

Load Life 1000 hours

1.0%

Moisture Resistance

1.0%

Temperature Cycle

0.5%

Short Time Overload

0.5%

Low Temperature Operation

0.5%

Solder Heat

0.25%

Shock

0.5%

Vibration

0.5%

Environmental Data

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LAS Series Issue October 2008 Sheet 1 of 3

LAS-3 Carbon Comp Replacement (contact factory)

The LAS-3 is a three watt conformal coated precision wirewound resistor. The resistance wire is welded to the end caps and

wound on alumina rod for good thermal conductivity. In circuit applications that utilize two watt carbon comp resistors the LAS-3

is an idead effective replacement. The LAS-3 5.6 ohm can be specifically designed to withstand 22 jooules of energy delivered

by a 1000 volt 10 x 1000 usec wave shape pulse.

Special LAS-3 5.6 ohm to 100 ohm will meet

Telecom GR-1089 lightning requirements.

• V = 1000 volts

• T1 = 10 usec rise

• T2 = 1000 usec to V2

• 10 ohm output impedance

MICROSECONDS

T2

LIGHTNING SURGE

T1

0

V2

V