Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series • • • • • • Flexible leads for thermal expansion Open-air design reduces PCB heating Values down to 1mΩ Element TCR ±20ppm/ºC Zero-ohm 65A jumper version RoHS compliant Electrical Data Power rating at 25°C Power rating at 85ºC Resistance range Resistance Tolerance Standard Values (Enquire for unlisted values) milliohms Inductance Ambient temperature range Current rating at 25°C Current rating at 85°C Ambient temperature range OARS1 OARS-XP 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 1, 2, 2.5, 5, 7.5, 10, 20, 25 watts watts ohms % 2 4 1 2 R002 to R050 R001 to R025 ≤ R002: 5, > R002: 1, 5 nH °C <10 -55 to +160 OARS-1Z amps amps °C Comments 65 46 -55 to +160 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 T 4.83 ±0.38 11.56 ±0.38 10.7 to 12.0* 3.51 ±0.76 D a nom. b nom. c nom. d nom. 3.18 4.07 ±0.76 ±0.38 4.7 3.56 4.45 6.35 7.24 2.36 ±0.25 ±0.76 2.28 to 4.57* W 4.83 ±0.76 ±0.38 ±0.38 c 9.37 3.07 9.58 3.18 b d 3.23 c a Issue F .09.07 Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series Performance Data (AEC-Q200) OARS1 OARS-XP ppm/ºC ∆R% ∆R% ∆R% ∆R% ∆R% ∆R% ∆R% TCR (-55 to 125ºC) Thermal Shock High Temp. Exposure (125ºC) Temp. Cycling (-40 to 125ºC) Operational Life Biased Humidity Mechanical Shock Vibration Terminal Strength Solvent Resistance Solderability <R004 <R002 240 0.75 1.75 1 2 0.75 1.5 1 R004 to R015 R002 to R007 40 0.75 0.5 1 1 0.5 1 1 Meets JIS-C-6429 Meets MIL-STD-002 Method 215 Meets J-STD-002 Method B Tem perature Derating Pulse Energy Rating 100 Energy (J) % of Rated Power 120 80 60 40 20 120 100 80 60 40 20 0 1 10 0 0 25 50 75 100 125 150 OARS1 Note: For OARS-1Z the above derating graph may be applied to the square of the current rating. Joint Temperature Rise Hot Spot Temperature Rise 7.6mm x 7.6mm pads, 2 oz copper on FR4, still air 50 / 25 30 / 15 150 10 / 5 100 5/- 50 50% 75% Proportion of Rated Power 100% Temperature Rise (K) Temperature Rise (K) Value in m illiohm s OARS1 / OARS-XP 200 0 25% OARS-XP 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 250 100 Value (m illiohm s) 175 Am bient Tem perature (Deg C) 300 >R015 >R007 40 0.75 1 0.75 1 0.5 1 1 100 Value in milliohms OARS1 / OARS-XP 80 5/- 60 10 / 5 30 / 15 40 50 / 25 20 0 25% 50% 75% 100% 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 A 4.32±0.08 7.21±0.1 B 11.7±0.08 11.94±0.1 11.56±0.1 C D E 24±0.3 11.5±0.1 1.75±0.1 F 8±0.1 12±0.1 G 4±0.1 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