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| NPR NPP 2-T126 TO-126PowerFilmResistors * * * * * * * Resistances from 0.01 to 51K Ohms Power Rating to 20Watt Resistance Tolerances to 0.05% TCR to 5ppm/K TO-126 Housing Convenient SMD DPak Available Low Inductance ( <50nH ) SPECIFICATIONS Type Heatsink1FreeAir2 PowerRating Thermal Resistance ResistanceRange3 MinMax 0.01W 51KW Tolerances 1%(R > 0.1W ) 5% 0.05%/0.1%/0.25% (R > 5W ) 0.5%(R > 1W ) / 1%(R > 0.1W ) 2%/5% 1 2 Temperature Coefficients 50ppm/K(R>10W ) 100ppm/K(R>0.1W ) 250ppm/K 5/10ppm/K(R>1W ) 25ppm/K(R >0.1W ) 100ppm/K NPR 2-T126 20W 1W 5.9K/W NPP 2-T126 5W 0.5W 6.0K/W 0.1W 51KW Powerratingbasedon25CFlangeTemperature Powerratingbasedon25CAmbientTemperature 3 ConsultFactoryforHigherorLowerValues Specification MaximumCurrent TemperatureRange DielectricStrength Max.OperatingVoltage InsulationResistance Value 25A -55Cto+155C:NPP2T126 -55Cto+120C:NPR2-T126 2000VAC 500V >1000Meg-Ohm EnvironmentalPerformance LoadLife HumidityResistance TemperatureCycle SolderHeat Vibration DR 1% 1% 0.25% 0.1% 0.25% TestConditions 25C/90minON/30minOFF/1000hr 40C/90-95%RH/DC0.1W/1000hr -55Cfor30min/+155Cfor30min/1000hr +350C/3s Riedon Inc. 1.01 300CypressAvenue AlhambraCA91801 www.riedon.com (626)284-9901 (626)284-1704 Page78 NPR NPP 2-T126 TO-126PowerFilmResistors SPECIFICATIONS (continued) PowerDeratingCurve 120 100 PowerRatingNotesThe NPR 2-T126 Series Foil Resistors must be attached to a suitableheatsink.Themaximuminternalresistortemperatureis 155C(120CfortheNPP2-T126). Tospecifyanappropriateheatsinkusethefollowingformula: Power(%) 80 60 40 20 0 NP NP P 2 -T 12 R 2-T 12 6 RqH=TMAX-(PxRqR)-TA 6 P 125 150 175 -25 0 25 50 75 100 AmbientTemperature(C) Where: RqH=ThermalResistanceofHeatsink(K/W) RqR=ThermalResistanceofResistor(K/W) TMAX=MaximumTemperatureofResistor TA=AmbientTemperatureofHeatsink(C) P=PowerThroughResistor(W) MountingNotes- TheNPR2-T126SeriesFilmResistorsmustbeattachedto asuitableheatsink.Mountresistorusingthermalgreaseto a clean / flat surface. Use a compression washer to provide 150to300pounds(665to1330N)ofmountingforce.Torque mountingscrewto8in-lbs(0.9Nm). Ordering Information PartNumber-Resistance-Tolerance-TCR Example:NPR2-T1260.5Ohm1%100ppm Riedon Inc. 1.01 300CypressAvenue AlhambraCA91801 www.riedon.com (626)284-9901 (626)284-1704 Page79 |
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