Open Air Sense Resistors Metal Alloy Strip OARS XP OARS XP *Open Zero ohm jumper available Airvalues Sense Resistors * Resistance 1 m to 25 m Alloy *Metal Open air designStrip provides cooler operation * Lead Free RoHS compliant construction available Zero ohm jumper * * Extended poweravailable surface mount current sense resistor * Resistance values 1 m: to 25 m: * * Unique form factor provides TCE compliant termination Open air design provides cooler operation * Lead Free RoHS compliant construction available * Extended power surface mount current sense resistor * Unique form factor provides TCE compliant termination Electrical Data Resistance Value (:) Absolute TCR (ppm/C) 0.001 240 0.002, 0.0025, 0.005, 0.010, 0.015, 0.020, 0.025 40 Available Tolerances (%) Rated Power (W) 1, 5 5 1 Non-Standard resistance values can be made available, subject to engineering charges and/or minimum order requirements. Features: * Superior thermal expansion cycling * Inductance less than 10 nanohenries * Flameproof * Lead flexible for thermal expansion Applications: * Current sensing * Feedback * Power Supplies * Motor Controllers Electrical Data Test Spec: AEC Q200 1m: 2m: - 7m: >7m: TCR +125 to -55C 240ppm 40ppm 40ppm Thermal Shock <0.75% <0.75% <0.75% High Temperature Exposure 125C <1.75% <0.5% <1.0% Temperature Cycling: -40 to +125C <1.0% <1.0% <0.75% Operational Life <2.0% <1.0% <1.0% Biased Humidity <0.75% <0.5% <0.5% Mechanical Shock <1.5% <1.0% <1.0% Vibration <1.0% <1.0% <1.0% <1.0 <2.5% <2.0 Moisture Resistance Terminal Strength Solvent Resistance Solderability Meets JIS-C-6429 Meets MIL-STD-202 Method 215 Meets J-STD-002 Method B General Note General Notereserves the right to make changes in product specification without notice or liability. TT electronics IRC reserves the right to make changes in product specification without notice or liability. All information is subject electronics' ownaccurate data and is considered accurate at time of going to print. All information is subject to IRC's to ownTT data and is considered at time of going to print. Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA (c) TT electronics plc 361 992 3377 * Website: www.irctt.com Telephone: 361 992 7900 * Facsimile: www.bitechnologies.com www.irctt.com www.welwyn-tt.com A subsidiary of TT electronics plc OARS-XP Issue March 2010 Sheet 1 of 3 08.12 OARS XP Open Air Sense Resistors OpenAlloy AirStrip Sense Resistors Metal Metal OARS XP Alloy Strip Physical Data L W H D T Dimensions (Inches and (mm)) IRC Type OARS-XP L (Resistance Dependant) H (Resistance Dependant) 0.425 - 0.470 0.090 - 0.180 0.093 0.010 0.190 0.030 (10.7 - 12.0) (2.28 - 4.57) (2.36 0.25) (4.83 0.76) * 0.250 0.015 (6.35 0.38) * 0.250+0.045/-0.015(6.35+1.14/-0.38) for R001 Power Derating Curve 6.0 Note: The power derating curve is a guidance based on a conservative design model. The OARS XP is a solid metal alloy construction that can withstand significantly greater operating temperatures than conservative design models permit. The resistive alloys can withstand temperatures in exess of 350C. Therefore, the system thermal design is a more significant design parameter due to the heat limitations of solder joints and/or circuit board substrate materials. Refer to additional information below. Power Rating (watts) 5.0 4.0 3.0 2.0 0.0 25 60 95 130 165 195 225 Ambient Temperature (C) The thermal image (not a simulation) to the left is of an OARS XP 2.5 m running at 5 Watts. Notice the hotpsot is nearly 205C, but the solder joint is approximately 115C (FR4 is rated for 130C). The unique construction of the OARS XP isolates the hotspot from the circuit board material preventing damage. Additionally, the thermal energy is dissipated to the air instead of being conducted into the circuit board potentially causing a nearby power component to exceed its rating. OARS XP R0025 Thermal Image @ 5 Watts Ambient conditions, No forced air. The standard test circuit board consists of a four layer FR4 material with 2 ounce outer layers and 1 ounce inner layers, which is typical of many industry designs. Contact IRC for more details or for other thermal image test data for specific resistance values and power levels. Wire and Film Technologies Division s 3OUTH 3TAPLES 3TREET s #ORPUS #HRISTI TEXAS 53! TELEPHONE: s FACSIMILE: s WEBSITE: WWWIRCTTCOM O!23 80 )SSUE -ARCH 3HEET OF 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 (c) TT electronics plc 08.12 OARS XP Open Air Sense Resistors Metal OpenAlloy AirStrip Sense Resistors OARS XP Metal Alloy Strip Pulse/Surge Chart Note: The high pulse surge capability of the OARS parts is attributed to the solid metal alloy construction. In many applications the cross-section of the OARS is greater than the cross-section of the board traces connecting the parts to the circuit board. Joules (watts-second) 120 100 80 60 Cross-Sectional area ranges from approximately 1375 mils to 7250 mils. 40 20 0 0 5 10 15 20 25 30 Resistance (milli ohms) Recommended Pad Layout OARS XP PAD (4 TERMINAL) 0.377 (9.58) 0.418 (10.57) 0.125 (3.18) 0.125 (3.18) 0.145 (3.67) 0.110 (2.79) 0.280 (7.11) 0.020 (0.51) 0.020 (0.51) OARS XP PAD (2 TERMINAL) 0.145 (3.67) 0.280 (7.11) 0.060 (1.52) 0.127 (3.23) 0.110 (2.79) 0.125 (3.16) 0.020 (0.51) 0.127 (3.23) Note: Recommended voltage sense pads for Kelvin connection Note: Recommended pad layout is based on the dimensional requirements to electrically attach to the component. Further minimum pad requirements should account for the total thermal performance characteristics of the system; such as operating currents, thermal dissipation capabilities of the circuit board, environmental considerations, nearby heat generating components... Ordering Data Sample Part No. OARS - XP R005 J LF IRC Type OARS Size Resistance Range (ohms) Tolerance (F = 1%, J = 5%) RoHS Indicator Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com OARS-XP Issue March 2010 Sheet 3 of 3 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 (c) TT electronics plc 08.12