AS SERIES SEMI-PRECISION POWER WIREWOUND RESISTOR * * * * * Alloy resistance wire wound to specific parameters including TCR's from 1/4 watt to 10 watts 5%, 3%, 1%, .5% tolerance 0.1 ohm to 175K ohms Resistance wire TCR 20 ppm/C RoHS-compliant version available Alpha Digital Marking All welded cap and lead Silicone conformal coating Heat conducting ceramic SPECIFICATIONS: Similar MIL-R-26 Style RW81 Power Rating 275C Max. Hot Spot Commercial Range (ohms) Non-Inductive Range (ohms) RW79U 125C 0.5 0.5 1 1 2 25C 1 1 2 2 3 Min. 0.1 0.1 0.1 .05 0.1 Max. 1.0K 6.0K 7.5K 2K 20K Min. * * 0.1 * 0.5 Max. * * 3.8K * 10K AS-2B AS-2C AS-3 AS-5 RW74U/ 3 2 3 5 4 3 5 7 0.1 0.1 0.1 0.1 24K 18K 30K 60K 0.5 0.2 0.5 0.8 AS-7 AS-10 RW78U 7 10 9 14 0.1 0.1 90K 175K 1.0 3.0 IRC Type AS-1/4 AS-1/2 AS-1 AS-1C AS-2 RW70U Inductance of AS-1/2 is less than 1H at 1MHz. To order non-inductive types, add the prefix "N". Example: NAS-1, NAS-2C, etc. DIMENSIONS (Inches and (mm)): Please note lead length dimension change on the following two items only: AS-2B 1.3 min AS-2C 1.3 min IRC Type AS-1/4 AS-1/2 AS-1 AS-1C AS-2 AS-2B AS-2C AS-3 AS-5 AS-7 AS-10 A0.032 0.250 (6.4) 0.312 (7.9) 0.367 (9.3) 0.256 (6.5) 0.480 (12.2) 0.540 (13.7) 0.489 (11.0) 0.687 (17.5) 0.875 (22.2) 1.250 (31.8) 1.812 (46.0) Available Resistance (ohms) 0.5%, 1% 3%, 5% 1-1K 1-6K 1-7.5K 1-2K 1-20K 0.1-1K 0.1-6K 0.1-7.5K .05-2K 0.1-20K 12K 7.5K 15K 30K 1-24K 1-18K 1-30K 1-60K 0.1-24K 0.1-18K 0.1-30K 0.1-60K 45K 50K 1-90K 1-175K 0.1-90K 0.1-175K * Typical inductance of AS-1C <5 ohms is < 1H. Lower values available upon request. NOTE: * Coating and marking is resistant to normal degreasing. Consult factory for special requirements. B (max) 0.094 (2.4) 0.094 (2.4) 0.125 (3.2) 0.115 (2.9) 0.250 (6.3) 0.219 (5.6) 0.157 (4.0) 0.282 (7.2) 0.344 (8.8) 0.344 (8.8) 0.385 (9.8) C (max) 0.312 (7.9) 0.375 (9.5) 0.429 (10.9) 0.303 (7.7) 0.600 (15.2) 0.663 (16.6) 0.594 (15.1) 0.812 (20.6) 0.980 (24.9) 1.375 (35.0) 1.937 (49.2) D (Lead Diameter) 0.020 (0.5) 0.020 (0.5) 0.020 (0.5) 0.025 (0.64) 0.025 (0.64) 0.032 (0.8) 0.032 (0.8) 0.032 (0.8) 0.032 (0.8) 0.040 (1.0) 0.040 (1.0) 0.040 (1.0) 0.040 (1.0) 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 WIREWOUND AND FILM TECHNOLOGIES DIVISION 1005 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com SELECTED PULSE-HANDLING CAPABILITY @ 125C: POWER DERATING: 2A ,2 Energy (watts-second) Percent of 125C Power Rating , 1C 2C 5,10 2B 1 Ambient Temperature (C) Resistance (ohms) ENVIRONMENTAL TESTING AT 25C: TEST CONDITION Load Life 1000 hours Moisture Resistance Temperature Cycle Short Time Overload Low Temperature Operation Solder Heat Shock Vibration MAX R 1.0% 1.0% 0.5% 0.5% 0.5% 0.25% 0.5% 0.5% HOW TO ORDER: Sample Part No.: AS - 3 27R0 1% LF Type Power 3 =3 watts (See specification chart for other power ratings) Resistance Value Expressed in ohms (Standard EIA/MIL Values) Tolerance 5%, 3%, 1%, 0.5% Lead Free Construction 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 1005