Resistors Resistors Open Air Resistor Open Air Resistor Metal Element Sense Metal Current Current Sense OARElement Open AirSeries Resistor OAR & OAR-TP Metal Element OAR & OAR-TP SeriesCurrent Powerratingsof1,3,&5W@85C * * * Sense Superiorsurgeperformance Power ratings of 1, 3, & 5W @ 85C TCR's to 20ppm/C HotspotisolatedfromPCBmaterial Superior surge performance Power ratings of 1, 3, & 5W @ 85C ResistancewireTCR20ppm/C Hot spot isolated from PCB material Resistance range from 2.5m to 100m Tolerancesto1% Resistance wire TCR 20ppm/C * Open air design maximizes thermal performance * Welded Tolerances to leads 1% minimize effects from solder wicking and provide copper AllPb-freepartscomplywithEUDirective2011/65/EU(RoHS2) true 1% performance All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data Part Number Power Rating @ 85C (watts) OAR-1 (TP) 1.0 OAR-3 (TP) 3.0 OAR-5 (TP) 5.0 Resistance Range (m) Tolerance (%) Wire TCR (ppm/C) Inductance (nH) 3, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80, 100 2, 2.5, 3, 4, 5, 6, 7, 10, 15, 20, 25, 30, 40, 45, 50, 60, 70, 100 3, 4, 5, 6, 6.2, 10, 12, 15, 20, 25, 30, 40, 50 1, 2, 5 20 <10 Notes: 2% tolerance available <5m Please contact factory for resistance values not listed Environmental Data Load Life (1000 hours @ 25C) R/R <1% Moisture (no load for 1000 hours) R/R <1% Temperature Cycling (-40C to +125C for 1000 cycles) R/R <1% Operating Temperature -40C to +125C General Note General Note TT thechanges right toin make in without product specification IRCElectronics reserves the reserves right to make productchanges specification notice or liability. without notice or liability. All information is subject to IRC's data and is considered accurate at considered time of going to print. General Note All information is subject to own TT Electronics' own data and is accurate at time of going to print. TT Electronics reserves the right to make changes in product specification without notice or liability. Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA All information subject to TT 361 Electronics' data and is considered accurate at time of going to print. (c) TT Electronics plc Telephone: 361 992is7900 * Facsimile: 992 3377 *own Website: www.irctt.com (c) TT Electronics plc BI Technologies IRC Welwyn A subsidiary of BI Technologies IRC Welwyn http://www.ttelectronics.com/resistors TT electronics plc OAR Series Issue June 2011 Sheet 1 of 3 www.ttelectronics.com/resistors 06.17 02.20 OAR Open AirResistor Resistor Open Air Open Air Resistor Metal Element Current SenseSense Metal Element Current Metal Element OAR &&OAR-TP Series OAR OAR-TP SeriesCurrent Sense OAR Open Air Resistor Physical Data Physical Data Metal Element Current Sense On lower ranges stand-off may be eliminated NOTE: Contact factory for: 1. Variations of "A" dimension. 2. Different lead diameter. B Physical Data C E On lower ranges stand-off may be eliminated F Test Point (Kelvin connection) A B Type A IROAR1 C Type 0.45 +0.04/-0.02 A (11.43 +1.02/-0.51) IRC Type OAR3TP OAR-5 <R005 OAR-1 OAR3TP R005 OAR-3 B0.32 (8.12) 0.27 Typ 0.197 +0.04/-0.03 (11.43 (5.0 +1.020/-0.508) +1.0/-0.8) 0.45max (11.4) 0.32 (8.12) OAR5TP C E E F 0.125 0.030 F 0.065 +0.010/-0.005 0.040 0.002 (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) A Test Point (Kelvin connection) 0.6000.60 +0.040/-0.020 0.65 Typ 0.125 0.030 0.065 +0.010/-0.005 +0.04/-0.02 Dimensions 0.92 (23.4) (Inches and (mm)) (15.24 +1.02/-0.51) 0.92 (23.4) max (15.24 +1.020/0.508) (3.18 0.762) (1.65 +0.254/-0.127) 0.065 +0.01/-0.005 A B C 0.125 0.03 E +0.04/-0.03 0.8000.275 +0.040/-0.020 0.65 Typ 0.125 0.030 (3.18 0.76) 0.065 +0.010/-0.005 (1.65 +0.25/-0.13) 0.450 +0.040/-0.020 0.27 Typ 0.125 0.030 0.065 +0.010/-0.005 (7.0 +1.0/-0.8) (20.32 +1.020/-0.508) 0.88 (22.4) (1.65 +0.254/-0.127) 1.12max (28.5) (3.18 0.762) (11.43 +1.020/-0.508) 0.32 (8.12) max (3.18 0.762) (1.65 +0.254/-0.127) 0.197 +0.04/-0.03 (5.0 +1.0/-0.8) 0.600 +0.040/-0.020 Thermal Image Data OAR5 OAR-5 E 1 0.450 +0.040/-0.020 OAR-1 OAR1TP OAR3 OAR-3 B max Dimensions (Inches andC(mm)) C NOTE: Contact factory for: F 1. Variations of "A" dimension. 2. Different lead diameter. 0.65 Typ 0.125 0.030 0.80 +0.04/-0.02 0.92 (23.4) max (15.24 +1.020/0.508) 0.88 (22.4) (3.18 0.762) (20.32 +1.02/-0.51) 0.800 +0.040/-0.020 0.275 +0.04/-0.03 (20.32 +1.020/-0.508) (7.0 +1.0/-0.8) 0.65 Typ 0.125 0.030 0.88 (22.4)1.14 max(29) (3.18 0.762) 0.040 0.002 (1.02 0.051) F0.04 0.002 0.040 0.002 (1.02 0.05) 0.040 0.002 (1.02 0.051) (1.02 0.051) 0.065 +0.010/-0.005 0.040 0.002 (1.65 +0.254/-0.127) (1.02 0.051) 0.065 +0.010/-0.005 0.040 0.002 (1.65 +0.254/-0.127) (1.02 0.051) Note 1: Nominal height varies with ohmic value. Thermal Image Data OAR-1 5 m @ 1 Watt OAR-3 5 m @ 3 Watt OAR-5 5 m @ 5 Watt Hot Spot: 87C Solder Joint: 45C Hot Spot: 160C Solder Joint: 70C Hot Spot: 230C Solder Joint: 96C The thermal images (not simulations) above are of the OAR products at their respective power rating. Notice the solder joint temperature is much lower than the hotspot. The unique construction of the OAR isolates the temperaOAR-1 5 m @ 1from Wattthe circuit board material OAR-3 5preventing m @ 3 Watt m @ 5 Watt ture of the hotspot damage to the circuitOAR-5 board. 5Additionally, the thermal energy is dissipated to the air instead of being conducted into the circuit board potentially causing a nearby power Hot Spot: 87C Hot Spot: 160C Hot Spot: 230C component to exceed its rating. Solder Joint: 45C Solder Joint: 70C Solder Joint: 96C The thermal images (not simulations) above of layer the OAR their respective power rating. The standard test circuit board consists of aare four FR4products material at with 2 ounce (70m) outer layersNotice and 1 the ounce solder joint temperature is much lower of than theindustry hotspot.designs. The unique of the OAR isolates temperature the tempera(35m) inner layers, which is typical many Theconstruction test conditions were in ambient ture of the hotspot from the circuit board preventing to the circuit board. Additionally, the thermal conditions, approximately 22 C with nomaterial forced air. Contactdamage TT electronics for more details or for other thermal image energy is dissipated to resistance the air instead of being conducted test data for specific values and power levels.into the circuit board potentially causing a nearby power component to exceed its rating. Wire and Film Technologies Division * 4222 South Staples Street * Co rpus ChristiTexas 78411 USA Telephone : 361 992 7900 *Facsimile:361 992 3377 Website * : www.irctt.com OAR Series Issue June 2011 Sheet 2 of 3 The standard test circuit board consists of a four layer FR4 material with 2 ounce (70m) outer layers and 1 ounce (35m) inner layers, which is typical of many industry designs. The test conditions were in ambient temperature conditions, approximately 22 C with no forced air. Contact TT electronics for more details or for other thermal image test data for specific resistance values and power levels. Wire and Film Technologies Division * 4222 South Staples Street * Co rpus ChristiTexas 78411 USA General Note Telephone : 361 992 7900 *Facsimile:361 992 3377 Website * : www.irctt.com General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All All information information isis subject subject to to TT TT Electronics' Electronics' own own data data and and isis considered considered accurate accurate at at time time of of going going to to print. print. OAR Series Issue June 2011 Sheet 2 of 3 BI Technologies IRC Welwyn www.ttelectronics.com/resistors http://www.ttelectronics.com/resistors (c) (c) TT TT Electronics Electronics plc plc 02.20 06.17 OAR Open AirResistor Resistor Open Air Open Air Resistor Metal Element Current SenseSense Metal Element Current Metal Element Current Sense OAR & OAR-TP Series OAR & OAR-TP Series Power Derating The typical power derating curves are based on conservative design concepts that extend from film based products. The OAR is a solid metal alloy construction that can withstand comparably greater operating power levels than conservative design models permit. Typically the resistive alloys can withstand temperatures in excess of 300C. Therefore, system thermal design considerations are a more significant design parameter due to the heat limitations of solder joints and/or circuit board substrate materials. 1400 1400 600 1200 1200 500 400 300 200 1000 800 600 400 100 200 0 0 0 10 20 30 40 50 60 70 80 90 100 Surge Current (Amps) 700 Surge Current (Amps) Surge Current (Amps) Pulse/Surge Chart @ 50 msec duration 1000 800 600 400 200 0 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 Resistance (milli-ohms) Resistance (milli-ohms) Resistance (milli-ohms) OAR-1(TP) OAR-3(TP) OAR-5(TP) 40 45 50 The Surge current charts are approximations of the capabilities of the OAR product and should not be used to the exclusion of actual testing. The relative high surge currents depicted in the charts are as a result of the robust all metal welded construction and the heat carrying capability of metal. Additionally the OAR resistive wire provides large relative cross section for current flow as compared to other resistor technologies, such as thin film, thick film, or metal strip. Ordering Data Sample Part No. OAR 1 R100 F LF IRC Style OAR Power Rating in Watts 1 = 1W, 3 = 3W, 5 = 5W Resistance Range `R' indicates decimal point location Tolerance F = 1%, G = 2%, J = 5% RoHS Indicator LF indicates RoHS compliance Blank indicates Sn/Pb terminal tinning; available on special request 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 General General Note Note TT TT Electronics Electronics reserves reserves the the right right to to make make changes changes in in product product specification specification without without notice notice or or liability. liability. All All information information isis subject subject to to TT TT Electronics' Electronics' own own data data and and isis considered considered accurate accurate at at time time of of going going to to print. print. OAR Series Issue June 2011 Sheet 3 of 3 BI Technologies IRC Welwyn www.ttelectronics.com/resistors http://www.ttelectronics.com/resistors (c) (c) TT TT Electronics Electronics plc plc 02.20 06.17 OAR-1(TP) OAR-3(TP) OAR-5(TP) The Surge current charts are approximations of the capabilities of the OAR product and should not be used to the exclusion of actual testing. The relative high surge currents depicted in the charts are as a Open result ofAir theResistor robust all metal welded construction and the heat carrying capability of metal. Additionally the OAR resistive provides large relative cross section for current flow as compared to other resistor Metal Element wire Current Sense technologies, such as thin film, thick film, or metal strip. OAR &&OAR-TP Series OAR OAR-TP Series Open Air Resistor Metal Element Current Sense Ordering Data Ordering Procedure Sample Part No. OAR 1 R100 F LF This product has two valid part numbers: IRC Style OAR European (Welwyn) Part Number: OAR3-R01JI (OAR3, 10 milliohms 5%, Pb-free) Power Rating in Watts 1 = 1W, 3 = 3W, 5 = 5W O Resistance Range A R `R' indicates decimal point location 3 - 1 Tolerance R 0 2 1 3 J I 4 5 F = 1%, G = 2%, J = 5% RoHS Indicator LF indicates RoHS 1 compliance Blank indicates Sn/Pb terminal tinning; availableType on special request 2 3 4 5 Pitch Value Tolerance Packing F = 1% G = 2% J = 5% I = Bulk OAR1 Omit for standard 3-5 characters OAR3 TP = Tight Pitch See Electrical Data OAR5 R = ohms Wire and Film Technologies Division * 4222 South Staples Street * Corpus Christi Texas 78411 USA OAR Series Issue June 2011 Sheet 3 of 3 Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com USA (IRC) Part Number: OAR3R010JLF (OAR3, 10 milliohms 5%, Pb-free) O A R 3 R 1 2 0 1 0 3 J 4 L F 5 1 2 3 4 Type Pitch Value Tolerance Termination F = 1% G = 2% J = 5% Omit for SnPb LF = Pb-free OAR1 Omit for standard 4/5 characters OAR3 TP = Tight Pitch See Electrical Data OAR5 R = ohms General GeneralNote Note TT TTElectronics Electronicsreserves reservesthe theright rightto tomake makechanges changesininproduct productspecification specificationwithout withoutnotice noticeor orliability. liability. All Allinformation informationisissubject subjectto toTT TTElectronics' Electronics'own owndata dataand andisisconsidered consideredaccurate accurateat attime timeof ofgoing goingto toprint. print. 5 BI BI Technologies Technologies IRC IRC Welwyn Welwyn www.ttelectronics.com/resistors http://www.ttelectronics.com/resistors (c) (c)TT TTElectronics Electronicsplc plc 02.20 06.17