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| SEMI-PRECISION POWER WIREWOUND RESISTOR ISO-9001 Registered AS SERIES * * * * 1/4 watt to 10 watts 5%, 3%, 1%, .5% tolerance 0.1 ohm to 175K ohms Resistance wire TCR 20 ppm/C Alloy resistance wire wound to specific parameters including TCR's from 20 to +5500 ppm/C Alpha - Digital Marking All welded cap and lead assembly Heat conducting ceramic substrate Silicone conformal coating SPECIFICATIONS: Power Rating 275C Equivalent Max. Hot Spot (watts) MIL-R-26 IRC Type 125C 25C Style AS-1/4 RW81 0.5 1 AS-1/2 0.5 1 AS-1 1 2 RW70U AS-1C 1 2 RW-69V/ AS-2 2 3 RW79U AS-2B AS-2C AS-3 AS-5 AS-7 AS-10 3 2 3 5 7 10 4 3 5 7 9 14 Commercial Range (ohms) Min. 0.1 0.1 0.1 .05 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Max. 1.0K 6.0K 7.5K 2K 20K 24K 18K 30K 60K 90K 175K Non-Inductive Range (ohms) Min. * * 0.1 * 0.5 0.5 0.2 0.5 0.8 1.0 3.0 Max. * * 3.8K * 10K 12K 7.5K 15K 30K 45K 50K Available Resistance (ohms) 0.5%, 1% 1-1K 1-6K 1-7.5K 1-2K 1-20K 1-24K 1-18K 1-30K 1-60K 1-90K 1-175K 3%, 5% 0.1-1K 0.1-6K 0.1-7.5K .05-2K 0.1-20K 0.1-24K 0.1-18K 0.1-30K 0.1-60K 0.1-90K 0.1-175K RW74U/ RW67V RW68V/ RW78U 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. * Typical inductance of AS-1C <5 ohms is < 1H. Lower values available upon request. 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 1.50 min. (38.1) A B C D NOTE: * Coating and marking is resistant to normal freon degreasing. Consult factory for special requirements. * AS marking available in Alpha Numeric or Colorbanding identification available. 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) 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) *Leads 60/40 are solder plated. AS-1C leads are copper. All others are 40% conductivity copper sheathed steel. WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com 1 ISO-9001 Registered POWER DERATING: 200 AS-1/4, 1/2, 1 Percent of 125C Power Rating TEMPERATURE RISE @ 25C: 275 250 Hot Spot Temperature (C) AS-7, 10 AS-3, AS-5 AS-1, AS-2 AS-2 175 AS-3 150 125 100 75 0 25 200 150 100 50 25 AS-2A, 2C AS-2 AS-5, 10 AS-7, 2B AS-7, 25 AS-2A, 2C AS-2B AS-2B AS-1/2 AS-1/4 75 125 175 225 275 0 40 80 120 160 200 Ambient Temperature (C) Percent of 25C Power Rating TEMPERATURE RISE @ 125C: 275 250 Hot Spot Temperature (C) AS-7, 10 AS-3, AS-5 AS-5 AS2A, AS2C AS-3, 2A, 2C SELECTED PULSE-HANDLING CAPABILITY @ 125C: 14 12 Energy (watts-second) AS-2A AS-2 AS-3 AS-2 AS-2B AS-1/2 10 8 200 AS-1/4 AS-2B 6 4 2 AS-1/2 AS-1/4 AS-2C AS-1 150 125 0 0 40 20 80 40 120 60 160 80 200 100 0 0.1 0.2 0.5 1 2 5 10 Percent of 125C Power Rating 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 0.25% 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% 2 WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road * Boone, North Carolina 28607-1860 * Tel: 828-264-8861 * Fax: 828-264-8866 * www.irctt.com |
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