Semi-Precision Power Resistors Semi-Precision Power Wirewound Resistor Semi-Precision Power Wirewound Resistor Welwyn Components Welwyn Components AS SeriesResistor Wirewound * 0.25 to 10 watts * Tolerance down to 0.5% * 0.25Series to 10 watts (N)AS * 0.1 ohm to 175K ohms * Tolerance down to 0.5% 0.25 to*10 watts Resistance wire TCR 20 ppm/C * 0.1 ohm to 175K ohms Tolerance down to 0.5% * Resistance wireohms TCR 20 ppm/C 0.1 ohm to 150K AS Series Resistance wire TCR 20 ppm/C Non inductive (NAS) option Pb-free option is RoHS compliant Standard winding (AS...) OBSOLETE All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data Equivalent Power Rating AS Standard Range NAS Non-inductive Available Tolerance (%) Range (ohms) (watts) (ohms) <1R0 1R0 Type Style 125C 25C Min. Max. Min. Max. Equivalent Power Rating AS Standard Range NAS Non-inductive Available Tolerance (%) 1/4 (N)AS500R 1R0 4K0 1 0R2 RW81 0.25 Range (ohms) MIL-R-26 (watts) (ohms) 1/2 (N)AS3K0 1R0 6K0Min. 1 Min. 0R24 0.525C <1R0 1R0 Style 125C Max. Max. (N)AS-1 3K8 0R1 7K5 2 0R1 1 RW70U 500R 1R0 4K0 1 0R2 RW81 0.25 (N)AS-1C 1K0 10R3K0 2K01R0 2 0R24 R056K0 1 1 0.5 MIL-R-26 Electrical Data Type (N)AS-1/4 (N)AS-1/2 (N)AS-2 RW70U (N)AS-1C (N)AS-2B RW79U (N)AS-2 (N)AS-2C RW79U1 (N)AS-2B (N)AS-3 (N)AS-2C (N)AS-5 (N)AS-3 (N)AS-7 3 RW74U2 (N)AS-1 (N)AS-10 RW74U (N)AS-5 1 2 3 RW78U5 7 (N)AS-7 Physical Data (N)AS-10 RW78U 10 2 2 3 2 3 0R1 4 R05 0R17K5 0R12K0 20K0R1 33K10R 0R53K8 0R51K0 10K 12K 3, 5 2 3 3 4 3 0R1 5 0R1 0R120K 0R133K 18K0R5 30K0R5 0R210K 0R512K 7K5 15K3, 5 0.5, 1, 3, 5 5 3 7 5 7 0R1 9 0R1 0R118K 0R130K 60K0R2 90K0R5 0R87K5 1R015K 30K 10 7 14 0R1 0R160K 150K 0R8 0R330K 51K 9 0R1 90K 1R0 45K 14 0R1 150K 0R3 51K 0.5, 1, 3, 5 45K Dimensions Inches (mm) Physical Type Data A 0.032 (0.81) 1/4 (N)AS0.250(6.4) Dimensions Inches (mm) 1/2 (N)AS0.312(7.9) Type B (max) A 0.032 (0.81) B (max) C (max) 0.094 (2.4) 0.312 (7.9) D (nom) E (min) 0.020 (0.5) 1.50 (38.1) 0.094 (2.4) 0.375 (min) 1.50 (38.1) D (9.5) (nom) 0.020E (0.5) C (max) (N)AS-1 0.020 (0.5) 0.429 (10.9) 0.125 (3.2) 0.367(9.3) 0.094 (2.4) 0.312 (7.9) 0.020 (0.5) 1.50 (38.1) 1.50 (38.1) 0.250(6.4) (N)AS-1C 1 (0.64) (7.7) (2.9) (N)AS- /2 1.50 (38.1) 1.50 (38.1) 0.020 (0.5)0.025 0.375 (9.5) 0.303 0.094 (2.4) 0.115 0.312(7.9) 0.256(6.5) (15.2) (N)AS-1 (N)AS-2 1.50(0.8) (38.1) 1.50 (38.1) 0.020 (0.5) 0.032 0.429(6.3) (10.9)0.600 0.125 (3.2) 0.250 0.367(9.3) 0.480(12.2) (16.6) (5.6) (N)AS-1C (N)AS-2B 1.50(0.8) (38.1) 1.30 (33.0) 0.025 (0.64) 0.032 0.303 (7.7)0.663 0.115 (2.9) 0.219 0.256(6.5) 0.540(13.7) (N)AS- 1/4 (N)AS-2C (15.1) 1.50(0.8) (38.1) 1.30D(33.0) 0.032 (0.8) 0.032 0.600(4.0) (15.2)0.594 0.250 (6.3) 0.157 0.480(12.2)0.489(11.0) 0.040 (1.0) 0.812 (20.6) 0.282 (7.2) 0.687(17.5) (N)AS-2B (N)AS-3 0.219 (5.6) 0.663 (16.6) 0.032 (0.8) 1.30 (33.0) 1.50 (38.1) 0.540(13.7) (N)AS-5 (24.9) 0.875(22.2) (N)AS-2C 1.30(1.0) (33.0) 1.50 (38.1) 0.032 (0.8) 0.040 0.594(8.8) (15.1)0.980 0.157 (4.0) 0.344 0.489(11.0) E D E A B A (N)AS-2 (N)AS-3 (N)AS-5 C B C (N)AS-7 (35.0) 1.50(1.0) (38.1) 1.50 (38.1) 0.040 (1.0) 0.040 0.812(8.8) (20.6)1.375 0.282 (7.2) 0.344 0.687(17.5)1.250(31.8) (N)AS-10 0.040 (1.0) 1.937 (49.2) 0.385 (9.8) 1.812(46.0) 0.344 (8.8) 0.980 (24.9) 0.040 (1.0) 1.50 (38.1) 1.50 (38.1) 0.875(22.2) (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) General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. GeneralNote Note General (c) Welwyn Limited Northumberland 7AA, UK Welwyn Components reservesComponents the right to make changes *inBedlington, product specification withoutNE22 notice or liability. A subsidiary of TT electronics plc BI Technologies IRC Welwyn TT Electronics reserves the right to in product specification without notice or liability. +44 (0)make 1670changes 822181 Facsimile: +44 (0)accurate 1670 829465 info@welwyn-tt.com * Website: www.welwyn-tt.com All informationTelephone: is subject to Welwyn's own data *and is considered at time* Email: of going to print. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK (c) TT Electronics Telephone: +44 (0) plc 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com A subsidiary ofIssue D * 03.06 TT electronics plc www.ttelectronics.com/resistors Issue D * 03.06 05.20 91 9 Semi-Precision Power Wirewound Resistor Semi-Precision Power Semi-Precision Power (N)AS Series WirewoundStandard Resistor winding (AS...) OBSOLETE Wirewound Resistor Welwyn Components AS Series AS Series Performance Welwyn Components Data Power Derating Power Derating 150 150 AS-1/4, 1/2, 1, 1C AS-1/4, 1/2, 1, 1C AS-3, 2 AS-3, 2 AS-2C AS-2C AS-5, 10 125 125 AS-2B AS-2B 100 100 250 Spot Temperature HotHot Spot Temperature (C) (C) 175 175 275 275 250 AS-5, 10 AS-7 AS-7 75 75 0 025 25 75 75 125 175 125 175(C) Ambient Temperature Ambient Temperature (C) 225 225 275 275 Temperature Rise @ 125C Temperature Rise @ 125C Spot Temperature HotHot Spot Temperature ( (C) C) 275 275 250 250 AS-7, 10 AS-7, 10 AS-3, AS-5 AS-3, AS-5 AS-2C AS-2C 200 200 150 150 AS-7, 10 AS-7, 10 AS-1,2 AS-1,2 AS-3, AS-5 AS-3, AS-5 AS-1/2 AS-1/2 100 100 50 50 25 25 0 0 AS-1C AS-1C AS-2B AS-2B AS-2C AS-2C AS-1/4 AS-1/4 40 80 120 40 Percent of 8025C Power120 Rating Percent of 25C Power Rating 160 160 200 200 Selected Pulse-Handling Capability @ 125C Selected Pulse-Handling Capability @ 125C AS-1,2 AS-1,2 AS-2B AS-2B 200 200 AS-1C AS-1C AS-1/2 AS-1/2 AS-1/4 AS-1/4 Energy (watts-second) Energy (watts-second) Percent of 125C Power Rating Percent of 125C Power Rating 200 200 Temperature Rise @ 25C Temperature Rise @ 25C 14 14 12 12 10 10 8 8 125 1250 0 0 00.1 0.1 Environmental Testing Testing at 25C Environmental Environmental Testing at 25C AS-2C AS-2C 4 4 2 2 200 200 AS-2B AS-2B 6 6 150 150 40 80 120 160 40Percent of80 120 Rating 160 125 C Power Percent of 125 C Power Rating AS-3 AS-3 AS-2 AS-2 AS-1/2 AS-1/2 AS-1/4 AS-1/4 0.2 0.2 AS-1 AS-1 0.5 1 2 0.5Resistance 1 (ohms) 2 Resistance (ohms) Test Condition Test Condition Load Life 1000 hours Max R Max 1.0%R Load LifeResistance 1000 hours Moisture Moisture Resistance Temperature Cycle 1.0% 1.0% 1.0% 0.5% Temperature Cycle Short Time Overload Short Time Overload Low Temperature Operation 0.5% 0.5% 0.5% 0.5% Low Temperature Operation Solder Heat Solder Heat Shock 0.5% 0.25% 0.25% 0.5% Shock Vibration Vibration 0.5% 0.5% 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. 5 5 10 10 BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK 05.20 Semi-Precision Power Wirewound Resistor (N)AS Series Standard winding (AS...) OBSOLETE Ordering Procedure Ordering Procedure This product has two valid part numbers: European (Welwyn) Part Number: AS3-27KFI (AS3, 27 kilohms 1%, Pb-free) A 1 S 3 - 2 7 2 K 3 F I 4 5 1 2 3 4 5 Winding Type Value Tolerance Termination & Packing1 Omit for standard N = noninductive D = 0.5% I = Pb-free, Standard pack (73mm tape & reel) F = 1% Tape & reel pack quantities H = 3% AS-1/4 to AS-7 1000/reel J = 5% AS-10 500/reel E24 = 3/4 AS1/4, AS1/2 characters AS1, AS1C R = ohms AS2, AS2B K = kilohms AS2C, AS3 AS5, AS7, AS10 Note 1: For alternative packing options, use USA part number format. USA (IRC) Part Number: AS32702FLF (AS3, 27 kilohms 1%, Pb-free) A 1 S 3 2 2 7 0 2 F 3 4 L F 5 6 1 2 3 4 5 6 Winding Type Value Tolerance Termination Packing1 D = 0.5% F = 1% H = 3% J = 5% Omit for SnPb Omit for standard (73mm) tape & reel LF = Pb-free BLK All sizes Bulk AS-1/4, Non-standard (63.5mm) TAF AS-1C tape & reel AS-1, Non-standard (52.4mm) TAE AS-1C tape & reel Non-standard (63.5mm) TBD AS-2 tape & reel AS-2, Non-standard (52.4mm) TBC AS-2B tape & reel Tape & reel pack quantities AS-1/4 to AS-7 1000/reel AS-10 500/reel AS1/4, AS1/2 3 digits + AS1, AS1C multiplier AS2, AS2B R = ohms for N = nonAS2C, AS3 values <100 inductive AS5, AS7, AS10 ohms Omit for standard Note 1: For full details see PS002 - Packing Specification Axial Resistors (IRC Origin): https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Resistors/ApplicationNotes/PS002-Packing-of-Axial-Resistors-IRC-Origin.pdf 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. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 05.20