Open Air Open Air Air Sense Resistors Sense Resistors Resistors Welwyn Components Welwyn Components OAR OAR SeriesSeries OAR Series 1, 3 5and 5 watts 1, * 3 and watts 3 5or watts 1% 5% tolerance 1% or 5% tolerance * 1, * and Resistance wire TCR 20 or 5% tolerance wire TCR ppm/C 20 ppm/C * 1% * Resistance Resistance values down to 0R005 ohmsohms wire values TCR 20 ppm/C Resistance down to 0R005 * Resistance * * * * * * Resistance values down to 0R005 ohms Electrical Data Electrical Data OAR-1 Power rating at 85C watts Resistance range Power rating at 85C watts ohms * Contact factory for values below 0R005 ohms Resistance range ohms OAR-3 OAR-1 1 0R005* to 0.10 1 0R005* to 0.10 OAR-3 3 30R005 to 0.10 OAR-5 OAR-5 5 50R005 to 0.05 0R005 to 0.10 0R005 to 0.05 E F * Contact factory for values below 0R005 ohms Physical Data Physical Data Dimensions (mm) Type (mm) Dimensions Type OAR-1 A B C OAR-1OAR-3 OAR-3OAR-5 11.43 A +1.020/-0.508 B 5.08 2.54 15.24 +1.020/-0.50 25.4 max. 11.43 +1.020/-0.508 5.08 2.54 20.32 +1.020/-0.50 25.4 max. 25.4 max. 15.24 +1.020/-0.50 1.65 E +0.254/-0.127 F 1.02 0.051 3.18 0.762 1.65 +0.254/0.127 1.02 0.051 3.18 0.762 1.65 +0.254/-0.127 1.02 0.051 3.18 0.762 1.65 +0.254/0.127 1.65 +0.254/-0.127 1.02 0.051 1.02 0.051 3.18 0.762 OAR-5 20.32 +1.020/-0.50 3.18 0.762 25.4 max. B B C C A A F F E C3.18 0.762 1.65 +0.254/-0.127 1.02 0.051 On lower ranges stand-off may be eliminated On lower ranges stand-off may be eliminated NOTE: Contact factory for: NOTE:1. Variations of `A' dimension Contact factory for: 2. Different lead diameter 1. Variations of `A' dimension 2. Different lead diameter Test Point (Kelvin connection) Test Point (Kelvin connection) E General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. General AllNote information is subject to Welwyn's own data and is considered accurate at time of going to print. General Note A subsidiary of TT electronics reserves reserves the rightthe to make changes in product without notice or notice liability.or liability. TT electronics plc Welwyn Components right to make changes in specification product specification without (c) Welwyn Northumberland NE22 A subsidiary of All information is subject subjectComponents to TT Welwyn's ownLimited datadata and *and isBedlington, considered accurate at time of going to UK print. to electronics' own is considered accurate at time of7AA, going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com Issue Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com TT electronics plcD * 08.04 (c) TT Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK (c) electronics plc Issue D * 08.04 Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 11. 11 101 101 Open OpenAirAir Sense SenseResistors Resistors OAR Series OAR Series Welwyn Components Height Standards All Resistances are in ohms. All Tolerances are 2.54. Dimensions (mm) OAR-1 Resistance 0.005 - 0.100 Height 5.080 OAR-3 Resistance 0.005 0.010 0.015 0.020 0.025 0.030 0.040 0.050 0.070 0.080 0.10 Height 16.002 16.510 16.510 17.018 22.098 22.860 16.002 18.288 22.860 21.590 22.860 Resistance 0.005 0.010 0.015 0.020 0.025 Height 15.240 19.304 19.304 22.860 22.860 OAR-5 Performance Data Maximum change Load life: 1000 hrs at 25C R% 1 Moisture No Load 100 hrs R% 1 Temperature Cycle at -40C & +125C (1000 cyc): R% 1 Features * Welded Construction * Flameproof * Inductance less than 10 nanohenries * Solderable copper leads Applications * Current Sensing * Feedback * Low inductance * Surge and pulse Ordering Procedure Example: OAR3 at 10 milliohms and 5% tolerance in bulk pack OAR3- R01JI Type Value (use IEC62 code) Tolerance (use IEC62 code) F J 1% 5% Packing I Bulk Standard General Note TT electronics reserves the right to make changes in product specification without notice or liability. (c) Welwyn Limitedown Bedlington, NE22 at 7AA, All information Components is subject to TT electronics' data and Northumberland is considered accurate timeUK of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com Issue D * 08.04 Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 102 (c) TT electronics plc 11. 11