AL SERIES CHASSIS MOUNTED POWER WIREWOUND RESISTOR Top surface marked * * * * * * 0.1 ohm to 180K ohm 5 watts to 50 watts 1% tolerance Non-inductive winding available High thermal conductivity cores available Lead Free ROHS Compliant Construction Molded and welded construction Screw mounts on chasis Values down to .01 ohms available. Contact factory with special applications. SPECIFICATIONS: Power Rating @ 25C(watts) IRC/SX MIL Style** Equiv. IRC/SX AL-5 RE-60G 7.5 AL-10 RE-65G 12.5 AL-25 RE-70G 25.0 AL-50 RE-75G 50.0 MIL 5 10 20 30 Power Rating: 5 to 50 watts depending upon style. 275C maximum hotspot at 25C 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 Resistance (ohms) Min. 0.1 0.1 0.1 0.1 Max. 16K 25K 55K 180K Max. MIL 3.32K 5.62K 12.1K 39.2K 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 *All resistors have an operating temperature range of -55C to +275C. 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 & tolerance ranges; contact factory. Standard Temperature Coefficient of Resistance: <1 ohm = 90 ppm 1 ohm to <10 ohms = 50 ppm 10 ohm = 20 ppm DIMENSIONS (Inches and (mm)): A Style 0.005 Tol. (metric) 0.1 0.444 AL-5 (11.28) 0.562 AL-10 (14.27) 0.719 AL-25 (18.26) 1.563 AL-50 (39.7) B 0.005 0.1 0.490 (12.45) 0.625 (15.88) 0.781 (19.84) 0.844 (21.44) C 0.031 0.8 0.600 (15.24) 0.750 (19.1) 1.062 (26.97) 1.968 (49.99) D 0.062 1.6 1.035 (28.58) 1.375 (34.93) 1.938 (49.23) 2.781 (70.64) Complete protection against E F G 0.015 0.015 0.015 0.4 0.4 0.4 0.334 0.646 0.320 (8.48) (16.41) (8.13) 0.430 0.800 0.400 (10.92) (20.3) (10.2) 0.530 1.080 0.560 (13.46) (27.43) (14.22) 0.615 1.140 0.615 (15.62) (28.96) (15.62) H 0.010 0.25 0.065 (1.65) 0.075 (1.91) 0.085 (2.16) 0.085 (2.16) J 0.010 0.25 0.140 (3.56) 0.190 (4.83) 0.260 (6.6) 0.300 (7.62) DERATING: K L 0.010 0.005 0.25 0.1 0.078 0.093 (1.98) (2.36) 0.093 0.093 (2.4) (2.4) 0.172 0.125 (4.37) (3.18) 0.196 0.125 (4.97) (3.18) AL resistors are rated to operate with a 275C maximum hotspot under full rated power at 25C ambient. They must be derated for higher ambient temperature per "Wattage vs. Ambient Temperature Derating Curve." M 0.015 0.4 0.078 (1.98) 0.102 (2.59) 0.115 (2.92) 0.107 (2.71) N 0.005 0.1 0.050 (1.27) 0.086 (2.18) 0.086 (2.18) 0.086 (2.18) HOW TO ORDER: Sample Part No.: AL 10 12K 0.010% LF Type Percent of Rated Power Power Range Tolerance Lead Free Construction Ambient Temperature (C) 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. WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com A subsidiary of TT electronics plc Issue Preliminary 0106