Surface Mount Sense Surface Mount Sense Resistors Resistors OARS, OARS-XP, OARSZ Series Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series Flexible leads for thermal expansion Flexible leads for thermal expansion Open-air design reduces PCB heating Open-air design reduces PCB heating Values down to 1m Values down to 1m OARS, OARS-XP, OARSZ Series Element TCR 20ppm/C Element TCR 20ppm/C Flexible leads for thermal expansion Zero-o hmZer6o-ohm 65A jumper version5A jumper version Open-air design reduces PCB heating RoHS compliant RoHS compliant Values down to 1m Element TCR 20ppm/C Zero-ohm 65A jumper version RoHS compliant Electrical Data OARS1 OARS-XP Power rating at 25C watts 2 4 Electrical Data Power rating at 85C watts 1 2 OARS1 OARS-XP Resistance range ohms R002 to R050 R001 to R025 watts 2 4 Power rating at 25C Resistance Tolerance % R002: 5, > R002: 1, 5 Power rating at 85C watts 1 2 Standard Values milliohms 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 1, 2, 2.5, 5, 7.5, 10, 20, 25 Resistance range ohms R002 to R050 R001 to R025 (Enquire for unlisted values) Inductance Resistance Tolerance nH % R0<0120: 5, > R002: 1, 5 Standard Values Ambient temperature range C -55 to +160 milliohms 2, 3, 4, 5, 10, 15, 20, 22, 25, 30, 40, 50 1, 2, 2.5, 5, 7.5, 10, 20, 25 (Enquire for unlisted values) Inductance nH <10 OARS-1Z Comments Ambient temperature range C -55 to +160 Current rating at 25C amps 65 Zero-ohm jumper Current rating at 85C amps 46 OARS-1Z Comments Ambient temperature range C -55 to +160 Current rating at 25C amps 65 Zero-ohm jumper Current rating at 85C amps 46 Physical Data Ambient temperature range C -55 to +160 Dimensions (mm) and recommended solder pads Physical Data Type L H T D W a nom. b nom. c nom. d nom. Dimensions (mm) and recommended solder pads 3.05 OARS1 >R003, OARS-1Z Type L H T D W a nom. b nom. c nom. d nom. 0.76 11.18 4.83 3.18 4.07 3.05 0.38 0.76 0.38 OARS1 >R003, OARS-1Z OARS1-R003 0.76 9.37 3.07 11.18 4.83 3.18 3.51 2.36 4.07 3.23 0.38 0.76 0.38 0.76 0.25 OARS1-R003 9.37 3.07 11.56 4.7 3.56 3.51 OARS1-R002 2.36 4.45 3.23 0.38 0.76 0.38 0.76 0.25 11.56 4.7 3.56 OARS1-R002 4.45 10.7 to 2.28 to 4.83 6.35 0.38 0.76 0.38 OARS-XP 7.24 9.58 3.18 12.0* 4.57* 0.76 0.38 10.7 to 2.28 to 4.83 6.35 OARS-XP 7.24 9.58 3.18 * Dependent on ohmic value 12.0* 4.57* 0.76 0.38 * Dependent on ohmic value b c b c d c c d a a 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 TT electronics plc 07.11 07.11 11. 11Surface Mount Sense Resistors Surface Mount Sense Resistors OARS, OARS-XP, OARSZ Series OARS, OARS-XP, OARSZ Series Performance Data (AEC-Q200) OARS1 <R004 R004 to R015 >R015 OARS-XP <R002 R002 to R007 >R007 TCR (-55 to 125C) ppm/C 240 40 40 Thermal Shock R% 0.75 0.75 0.75 High Temp. Exposure (125C) R% 1.75 0.5 1 Temp. Cycling (-40 to 125C) R% 1 1 0.75 Operational Life R% 2 1 1 Biased Humidity R% 0.75 0.5 0.5 Mechanical Shock R% 1.5 1 1 Vibration R% 1 1 1 Terminal Strength Meets JIS-C-6429 Solvent Resistance Meets MIL-STD-002 Method 215 Solderability Meets J-STD-002 Method B Temperature Derating Pulse Energy Rating 120 120 100 100 80 80 60 40 60 20 40 0 20 1 10 100 0 Value (milliohms) 0 25 50 75 100 125 150 175 OARS1 OARS-XP Ambient Temperature (Deg C) Note: For OARS-1Z the above derating graph may be applied to Note: This graph relates to single pulses of short duration ( 100ms). the square of the current rating. Higher energy limits apply for longer pulses and overloads Joint Temperature Rise Hot Spot Temperature Rise 7.6mm x 7.6mm pads, 2 oz copper on FR4, still air 7.6mm x 7.6mm pads, 2 oz copper on FR4, still air 300 100 Value in milliohms Value in milliohms OARS1 / OARS-XP OARS1 / OARS-XP 250 80 50 / 25 5 / - 200 60 10 / 5 30 / 15 150 10 / 5 30 / 15 40 100 5 / - 50 / 25 20 50 0 0 25% 50% 75% 100% 25% 50% 75% 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. 07.11 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 TT electronics plc 11. 11 % of Rated Power Temperature Rise (K) Temperature Rise (K) Energy (J)