SEMI-PRECISION POWER WIREWOUND RESISTOR ISO-9001 Registered AS SERIES Alloy resistance wire wound to specific parameters including TCR's from ±20 to +5500 ppm/°C Alpha - Digital Marking Silicone conformal coating All welded cap and lead assembly • • • • 1/4 watt to 10 watts ±5%, ±3%, ±1%, ±.5% tolerance 0.1 ohm to 175K ohms Resistance wire TCR ±20 ppm/°C Heat conducting ceramic substrate SPECIFICATIONS: Commercial Range (ohms) Power Rating 275°C Equivalent Max. Hot Spot (watts) MIL-R-26 IRC Type 125°C 25°C 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 RW74U/ RW67V RW68V/ RW78U Non-Inductive Range (ohms) Available Resistance (ohms) 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 0.5%, 1% 1-1K 1-6K 1-7.5K 1-2K 1-20K 3%, 5% 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 1µH 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 < 1µH. 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 C 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 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. B A±0.032 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) D 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: TEMPERATURE RISE @ 25°C: 275 200 175 150 AS-2A, 2C AS-2 125 AS-5, 10 100 AS-7, 2B AS-7, 25 200 AS-2B AS-2B AS-2A, 2C 150 AS-1/2 100 AS-1/4 50 75 0 25 25 75 125 175 225 275 0 40 80 Ambient Temperature (°C) 275 14 AS-2B AS-1/2 200 AS-1/4 Energy (watts-second) AS-2 150 10 40 20 80 40 120 60 160 80 AS-2B 6 AS-2C 4 0 0.1 200 100 AS-3 AS-2 8 2 00 AS-1 AS-1/2 AS-1/4 0.2 0.5 Percent of 125°C Power Rating 1 2 MAX ∆ R 1.0% 1.0% 0.5% 0.5% 0.5% 0.25% 0.5% 0.5% 10 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 5 Resistance (ohms) ENVIRONMENTAL TESTING AT 25°C: TEST CONDITION Load Life 1000 hours Moisture Resistance Temperature Cycle Short Time Overload Low Temperature Operation Solder Heat Shock Vibration 200 AS-2A 12 AS-3, AS-5 AS-5 AS2A,2A, AS2C AS-3, 2C 160 SELECTED PULSE-HANDLING CAPABILITY @ 125°C: AS-7, 10 250 Hot Spot Temperature (°C) 120 Percent of 25°C Power Rating TEMPERATURE RISE @ 125°C: 125 AS-1, AS-2 AS-2 AS-3, AS-5 AS-3 Hot Spot Temperature (°C) Percent of 125°C Power Rating AS-7, 10 250 AS-1/4, 1/2, 1 WIREWOUND AND FILM TECHNOLOGIES DIVISION 736 Greenway Road • Boone, North Carolina 28607-1860 • Tel: 828-264-8861 • Fax: 828-264-8866 • www.irctt.com