ISO-9001 Registered SEMI-PRECISION POWER WIREWOUND Alloy resistance wire wound to specific parameters including TCR's from 20 to +5500 ppm/C AS SERIES * * * * * Alpha - Digital Marking Silicone conformal coating All welded cap and lead assembly 1/2 watt to 10 watts Heat conducting 5%, 3%, 1%, .5% tolerance ceramic substrate 0.1 ohm to 175K ohms Resistance wire TCR 20 ppm/C AS-SM for surface mount capabilities. See Surface Mount section of this catalog for details. Manufactured in Barbados SPECIFICATIONS: Power Rating 275C Equivalent Max. Hot Spot (watts) MIL-R-26 125C 25C Style IRC Type LAS-1 LAS-3 AS-1/4 AS-1/2 AS-1 AS-1C AS-2 AS-2B AS-2C AS-3 AS-5 AS-7 AS-10 RW81 RW70U RW-69V/ RW79U RW74U/ RW67V RW68V/ RW78U Commercial Range (ohms) Non-Inductive Range (ohms) Available Resistance (ohms) Min. Max. Min. Max. 0.5%, 1% 3%, 5% 1 2 2 3 0.1 0.1 7.5K 18K 0.1 0.2 3.8K 7.5K 1-7.5K 1-18K 0.1-6K 0.1-18K 0.5 0.5 1 1 2 1 1 2 2 3 0.1 0.1 0.1 .05 0.1 1.0K 6.0K 7.5K 2K 20K * * 0.1 * 0.5 * * 3.8K * 10K 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 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 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 7 10 9 14 0.1 0.1 90K 175K 1.0 3.0 45K 50K 1-90K 1-175K 0.1-90K 0.1-175K 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. AS DIMENSIONS (Inches and (mm)): LAS-1 1.475 LAS-3 1.403 1.50 min. (38.1) B NOTE: Coating and marking is resistant to normal freon degreasing. Consult factory for special requirements. A D C IRC Type A0.032 B (max) C (max) D (Lead Diameter) LAS-1 LAS-3 0.348 (8.84) 0.491 (12.47) 0.110 (2.80) 0.149 (3.80) 0.407 (10.34) 0.550 (13.99) 0.020 (0.53) 0.032 (0.81) AS-1/4 AS-1/2 AS-1 AS-1C AS-2 AS-2B AS-2C AS-3 AS-5 AS-7 AS-10 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) 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) 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) 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. WIRE AND FILM TECHNOLOGIES 736 Greenway Road * PO Box 1860 * Boone, North Carolina 28607-1860 * Tel: 704-264-8861 * Fax: 704-264-8865 1 ISO-9001 Registered POWER DERATING: TEMPERATURE RISE @ 25C: 275 200 175 150 AS-2A, 2C AS-2 125 AS-5, 10 100 AS-1, AS-2 AS-2 AS-3, AS-5 AS-3 , LAS-3 Hot Spot Temperature (C) Percent of 125C Power Rating AS-7, 10 250 AS-1/4, 1/2, 1 LAS-1, AS-2B AS-7, 25 200 LAS-1 AS-2B AS-2B LAS-3, 2C AS-2A, 150 AS-1/2 100 AS-1/4 50 75 25 0 25 75 125 175 225 275 0 40 80 Ambient Temperature (C) 275 200 14 AS-7, 10 AS-2A AS-3, AS-5 AS-5 AS-2B AS-2 AS2A,2A, AS2C AS-3, 2C LAS-3 LAS-1 AS-1/2 200 AS-1/4 Energy (watts-second) 12 250 Hot Spot Temperature (C) 160 SELECTED PULSE-HANDLING CAPABILITY @ 125C: TEMPERATURE RISE @ 125C: 10 AS-3 AS-2 8 AS-2B 6 AS-2C LAS-3 4 AS-1 ,LAS-1 150 125 120 Percent of 25C Power Rating 2 0 20 40 60 80 0 0.1 100 AS-1/2 AS-1/4 0.2 0.5 Percent of 125C Power Rating ENVIRONMENTAL TESTING: TEST CONDITION Load Life 1000 hours Moisture Resistance Temperature Cycle Short Time Overload Low Temperature Operation Solder Heat Shock Vibration 1 2 5 10 Resistance (ohms) HOW TO ORDER: MAX R 1.0% 1.0% 0.5% 0.5% 0.5% 0.25% 0.5% 0.5% Sample Part No.: AS-3 27 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% WIRE AND FILM TECHNOLOGIES 736 Greenway Road * PO Box 1860 * Boone, North Carolina 28607-1860 * Tel: 704-264-8861 * Fax: 704-264-8865 2