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

AL Series

*Values down to .01 ohms available. Contact factory with special applications.

Chassis Mounted Power

Wirewound Resistor

Electrical Data

IRC/SX

Style**

MIL

Equivalent

Power Rating @25°C (watts)

Resistance (ohms)

IRC/SX

MIL

Min.

Max.

Max. MIL

AL-5

RE-60G

7.5

5

0.1

16K

3.32K

AL-10

RE-65G

12.5

10

0.1

25K

5.62K

AL-25

RE-70G

25.0

20

0.1

55K

12.1K

AL-50

RE-75G

50.0

30

0.1

180K

39.2K

*All resistors have an operating temperature range of -55

°C to +275°C. Derating is required for reduced chassis mounting area

and for high ambient temperatures.

**To order non-inductive styles add suffix N (e.g.:ALN-5). (Divide Max. Res. Values by styles available with extended resistance

and tolerance ranges; contact factory.

Power Rating:

5 to 50 watts depending upon style. 275

°C maximum hotspot at 25°C ambient. Conforms to MIL-R-18546.

1% maximum

∆R in 1000 hour load life. Proper heat sinks are as follows:

4 x 5 x 2 x 0.040 aluminum chassis - AL-5 and AL-10

5 x 7 x 2 x 0.040 aluminum chassis - AL-25 and AL-50

Construction:

Windings are "controlled stress" wound on ground ceramic cores. Terminations are of welded construction.

Terminals are electronically welded to the end caps for maximum strength and electrical continuity. A high

temp. silicone encapsulation is used to mold the wound assembly within the anodized

Standard Temperature Coefficient of Resistance:

<1 ohm = ±90 ppm

≥1 ohm to <10 ohms = ±50 ppm

≥10 ohm = ±20 ppm

AL Series Issue August 2008 Sheet 1 of 2