Semi-Precision Power Semi-Precision Power Semi-Precision Power Wirewound Resistor Welwyn Components Wirewound Resistor Welwyn Components Wirewound Resistor (N)AS Series AS Series AS Series 0.25 to 10 watts 0.25 to 10 watts 0.25 to 10 watts Tolerance down to 0.5% Tolerance down to 0.5% Tolerance down to 0.5% 0.1 ohm to 175K ohms 0.1 ohm to 175K ohms 0.1 ohm to 175K ohms Resistance wire TCR 20 ppm/C Resistance wire TCR 20 ppm/C Resistance wire TCR 20 ppm/C Non inductive (NAS) option Pb-free option is RoHS compliant Electrical Data Electrical Data Equivalent Power Rating Commercial Range Non-Inductive Range Available Resistance Equivalent Power Rating Commercial Range Non-Inductive Range Available Resistance MIL-R-26 (watts) (ohms) (ohms) (ohms) MIL-R-26 (watts) (ohms) (ohms) (ohms) Type Style 125C 25C Min. Max. Min. Max. 0.5%, 1% 3%, 5% Type 1 Style 125C 25C Min. Max. Min. Max. 0.5%, 1% 3%, 5% (N)AS- /4 RW81 0.25 1 0R1 1K0 0R2 60R 1R0-1K0 0R1-1K0 1 (N)AS- /4 1 RW81 0.25 1 0R1 1K0 0R2 60R 1R0-1K0 0R1-1K0 (N)AS- /2 0.5 1 0R1 6K0 0R5 60R 1R0-6K0 0R1-6K0 1 (N)AS- /2 0.5 1 0R1 6K0 0R5 60R 1R0-6K0 0R1-6K0 (N)AS-1 RW70U 1 2 0R1 7K5 0R2 3K8 1R0-7K5 0R1-7K5 (N)AS-1 RW70U 1 2 0R1 7K5 0R2 3K8 1R0-7K5 0R1-7K5 (N)AS-1C 1 2 R05 2K0 10R 1K0 1R0-2K0 R05-2K0 (N)AS-1C 1 2 R05 2K0 10R 1K0 1R0-2K0 R05-2K0 RW79U 2 3 0R1 20K R25 10K 1R0-20K 0R1-20K (N)AS-2 RW79U 2 3 0R1 20K R25 10K 1R0-20K 0R1-20K (N)AS-2 3 4 0R1 24K 0R1 12K 1R0-24K 0R1-24K (N)AS-2B 3 4 0R1 24K 0R1 12K 1R0-24K 0R1-24K (N)AS-2B(N)AS-2C 2 3 0R1 18K 0R2 7K5 1R0-18K 0R1-18K (N)AS-2C 0R1-18K 2 3 0R1 18K 0R2 7K5 1R0-18K 3 5 0R1 30K 0R1 15K 1R0-30K 0R1-30K (N)AS-3 3 5 0R1 30K 0R1 15K 1R0-30K 0R1-30K (N)AS-3 0R1-60K (N)AS-5 RW74U 5 7 0R1 60K 0R1 30K 1R0-60K 0R1-60K (N)AS-5 RW74U 5 7 0R1 60K 0R1 30K 1R0-60K 7 9 0R1 90K 0R2 45K 1R0-90K 0R1-90K (N)AS-7 7 9 0R1 90K 0R2 45K 1R0-90K 0R1-90K (N)AS-7 0R1-175K RW78U 10 14 0R1 175K 0R2 50K 1R0-175K (N)AS-10 0R1-175K RW78U 10 14 0R1 175K 0R2 50K 1R0-175K (N)AS-10 Physical Data Physical Data Dimensions Inches (mm) Dimensions Inches (mm) Type A 0.032 (0.81) B (max) C (max) D (nom) E (min) Type A 0.032 (0.81)1 B (max) C (max) D (nom) E (min) (N)AS- /4 0.250(6.4) 0.094 (2.4) 0.312 (7.9) 0.020 (0.5) 1.50 (38.1) 1 (N)AS- /4 10.250(6.4) 0.094 (2.4) 0.312 (7.9) 0.020 (0.5) 1.50 (38.1) (N)AS- /2 0.312(7.9) 0.094 (2.4) 0.375 (9.5) 0.020 (0.5) 1.50 (38.1) 1 (N)AS- /2 0.312(7.9) 0.094 (2.4) 0.375 (9.5) 0.020 (0.5) 1.50 (38.1) (N)AS-1 0.367(9.3) 0.125 (3.2) 0.429 (10.9) 0.020 (0.5) 1.50 (38.1) (N)AS-1 0.367(9.3) 0.125 (3.2) 0.429 (10.9) 0.020 (0.5) 1.50 (38.1) (N)AS-1C 0.256(6.5) 0.115 (2.9) 0.303 (7.7) 0.025 (0.64) 1.50 (38.1) E A (N)AS-1C 0.256(6.5) 0.115 (2.9) 0.303 (7.7) 0.025 (0.64) 1.50 (38.1) E A (N)AS-2 0.480(12.2) 0.250 (6.3) 0.600 (15.2) 0.032 (0.8) 1.50 (38.1) D B (N)AS-2 0.480(12.2) 0.250 (6.3) 0.600 (15.2) 0.032 (0.8) 1.50 (38.1) (N)AS-2B 0.540(13.7) 0.219 (5.6) 0.663 (16.6) 0.032 (0.8) 1.30 (33.0) D B (N)AS-2B 0.540(13.7) 0.219 (5.6) 0.663 (16.6) 0.032 (0.8) 1.30 (33.0) C (N)AS-2C 0.489(11.0) 0.157 (4.0) 0.594 (15.1) 0.032 (0.8) 1.30 (33.0) C (N)AS-2C 0.489(11.0) 0.157 (4.0) 0.594 (15.1) 0.032 (0.8) 1.30 (33.0) (N)AS-3 0.687(17.5) 0.282 (7.2) 0.812 (20.6) 0.040 (1.0) 1.50 (38.1) (N)AS-3 0.687(17.5) 0.282 (7.2) 0.812 (20.6) 0.040 (1.0) 1.50 (38.1) (N)AS-5 0.875(22.2) 0.344 (8.8) 0.980 (24.9) 0.040 (1.0) 1.50 (38.1) (N)AS-5 0.875(22.2) 0.344 (8.8) 0.980 (24.9) 0.040 (1.0) 1.50 (38.1) (N)AS-7 1.250(31.8) 0.344 (8.8) 1.375 (35.0) 0.040 (1.0) 1.50 (38.1) (N)AS-7 1.250(31.8) 0.344 (8.8) 1.375 (35.0) 0.040 (1.0) 1.50 (38.1) (N)AS-10 1.812(46.0) 0.385 (9.8) 1.937 (49.2) 0.040 (1.0) 1.50 (38.1) (N)AS-10 1.812(46.0) 0.385 (9.8) 1.937 (49.2) 0.040 (1.0) 1.50 (38.1) General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. General Note General Note A subsidiary of All information is subject to Welwyns own data and is considered accurate at time of going to print. Welwyn Components reserves the right to make changes in product specification without notice or liability. TT electronics reserves the right to make changes in product specification without notice or liability. TT electronics plc A subsidiary of All information is subject to Welwyns own data and is considered accurate at time of going to print. All information is subject to TT electronics own data and is considered accurate at time of going to print. Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK TT electronics plc www.bitechnologies.com www.irctt.com www.welwyn-tt.com Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Issue D 03.06 Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK TT electrTelephone: +44onics plc (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Issue D 03.06 91 1.14 91Semi-Precision Power Wirewound Resistor Semi-Precision Power (N)AS SeriesSemi-Precision Power Wirewound Resistor Wirewound Resistor Welwyn Components AS Series Welwyn Components AS Series Performance Data Power Derating Temperature Rise 25C Power Derating Temperature Rise 25C 275 200 AS-7, 10 275 200 250 AS-1/4, 1/2, 1, 1C AS-7, 10 AS-2A, 2C 250 175 AS-1/4, 1/2, 1, 1C AS-3, AS-5 AS-2A, 2C 175 AS-3, 2 AS-3, AS-5 200 AS-3, 2 AS-2B 200 150 AS-2A, 2C AS-2C AS-2B 150 AS-2A, 2C AS-2C AS-5, 10 150 AS-1/2 125 AS-5, 10 150 AS-1/2 125 AS-2B 100 AS-2B 100 100 AS-1/4 AS-7 100 AS-1/4 AS-7 50 75 50 75 25 25 0 0 40 80 120 160 200 25 75 125 175 225 275 0 25 75 125 175 225 275 0 40 80 120 160 200 Percent of 25C Power Rating Ambient Temperature (C) Percent of 25C Power Rating Ambient Temperature (C) Temperature Rise 125C Selected Pulse-Handling Capability 125C Temperature Rise 125C Selected Pulse-Handling Capability 125C 275 14 275 AS-7, 10 AS-2A 14 AS-7, 10 12 AS-2A 250 12 AS-3, AS-5 AS-3 250 AS-2 AS-2B AS-2 10 AS-3, AS-5 AS-3 AS-2 AS-2B AS-2A, 2C AS-2 10 AS-2A, 2C AS-1/2 8 AS-1/2 8 200 AS-2B 6 200 AS-2B 6 AS-2C AS-1/4 4 AS-2C AS-1/4 4 AS-1 150 2 AS-1 AS-1/2 150 2 AS-1/2 AS-1/4 125 0 AS-1/4 0 40 80 120 160 200 0.1 0.2 0.5 1 2 5 10 125 0 0 40 80 120 160 200 0.1 0.2 0.5Resistance (ohms)1 2 5 10 Percent of 125C Power Rating Resistance (ohms) Percent of 125C Power Rating Environmental Testing at 25C Environmental Testing Environmental Testing at 25C Test Condition Max R Test Condition Max R Load Life 1000 hours 1.0% Load Life 1000 hours 1.0% Moisture Resistance 1.0% Moisture Resistance 1.0% Temperature Cycle 0.5% Temperature Cycle 0.5% Short Time Overload 0.5% Short Time Overload 0.5% Low Temperature Operation 0.5% Low Temperature Operation 0.5% Solder Heat 0.25% Solder Heat 0.25% Shock 0.5% Shock 0.5% Vibration 0.5% Vibration 0.5% General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com TT electronics plc 1.14 Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Issue D 03.06 Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Issue D 03.06 92 92 Hot Spot Temperature (C) Percent of 125C Power Rating Hot Spot Temperature (C) Percent of 125C Power Rating Hot Spot Temperature (C) Hot Spot Temperature (C) Energy (watts-second) Energy (watts-second)