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| Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series * * * * * * Flexible leads for thermal expansion Open-air design reduces PCB heating Values down to 1m Element TCR 20ppm/C Zero-ohm 65A jumper version RoHS compliant Electrical Data Power rating at 25C Power rating at 85C Resistance range Resistance Tolerance Standard Values watts watts ohms % milliohms nH C amps amps C 2 4 1 2 R002 to R050 R001 to R025 R002: 5, > R002: 1, 5 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 <10 -55 to +160 1, 2, 2.5, 5, 7.5, 10, 20, 25 OARS1 OARS-XP (Enquire for unlisted values) Inductance Ambient temperature range Current rating at 25C Current rating at 85C Ambient temperature range OARS-1Z 65 46 -55 to +160 Comments Zero-ohm jumper Physical Data Dimensions (mm) and recommended solder pads Type L H 3.05 OARS1 >R003, OARS-1Z 0.76 11.18 OARS1-R003 OARS1-R002 OARS-XP * Dependent on ohmic value 0.38 T D 0.76 W 0.38 a nom. b nom. c nom. d nom. 4.07 4.45 7.24 9.58 3.18 9.37 3.07 4.83 4.7 3.18 3.56 6.35 11.56 0.38 10.7 to 12.0* 3.51 0.76 2.28 to 4.57* 2.36 0.25 3.23 0.76 0.76 0.38 0.38 4.83 c a b d c Issue F .09.07 Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series Performance Data (AEC-Q200) OARS1 OARS-XP ppm/C R% R% R% R% R% R% R% 0 25 50 75 100 125 150 175 TCR (-55 to 125C) Thermal Shock High Temp. Exposure (125C) Temp. Cycling (-40 to 125C) Operational Life Biased Humidity Mechanical Shock Vibration Terminal Strength Solvent Resistance Solderability >R015 >R007 40 0.75 1 0.75 1 0.5 1 1 Tem perature Derating 120 % of Rated Power 80 60 40 20 0 Am bient Tem perature (Deg C) Energy (J) 100 10 Value (m illiohm s) OARS1 OARS-XP 100 Note: For OARS-1Z the above derating graph may be applied to the square of the current rating. Note: This graph relates to single pulses of short duration ( 100ms). Higher energy limits apply for longer pulses and overloads 7.6m m x 7.6m m pads, 2 oz copper on FR4, still air Hot Spot Temperature Rise 7.6mm x 7.6mm pads, 2 oz copper on FR4, still air Value in m illiohm s OARS1 / OARS-XP Joint Temperature Rise 250 200 150 100 50 0 25% 50% 75% Temperature Rise (K) Temperature Rise (K) 300 100 80 60 40 20 0 25% 50% 75% Value in milliohms OARS1 / OARS-XP 50 / 25 30 / 15 10 / 5 5/- 5/10 / 5 30 / 15 50 / 25 100% 100% Proportion of Rated Power Proportion of Rated Power Note: Temperature rise data are given here for typical mounting conditions. Actual figures depend on PCB copper weight, mounting pad size, track width and substrate type. Also, the open air format responds better to forced air cooling than chip format resistors. For values below 5 milliohms allowance should be made for heat generated in the copper tracks themselves. Application-specific guidance is available on request. Issue F .09.07 Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series Flammability The resistor will not burn or emit incandescent particles under any condition of applied temperature or overload. Marking The parts are legend marked with ohmic value and tolerance code. Packaging Data Dimensions (mm) Type OARS1, OARS-1Z OARS-XP-R001 OARS-XP >R001 4.320.08 7.210.1 A 11.70.08 11.940.1 11.560.1 B C 240.3 D 11.50.1 E 1.750.1 80.1 120.1 F G 40.1 Ordering Procedure Example: OARS1 at 10 milliohms and 5% tolerance on a reel of 1900 pieces OARS1-R01JI Type OARS1 OARS-XP Value (use IEC62 code) Tolerance (use IEC62 code) F J 1% 5% Packing I Tape OARS1 OARS-XP 1900/reel 1200/reel Standard For the zero-ohm link, order OARS-1Z (Pack quantity is 1900/reel) Issue F .09.07 |
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