NPR2-T126 RIEDON | Alldatasheet
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Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 781.01 NPR NPP 2-T126 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
1 Power rating based on 25°C Flange Temperature
2 Power rating based on 25°C Ambient Temperature
3 Consult Factory for Higher or Lower Values
Temperature Range -55°C to +155°C : NPP 2T126 -55°C to +120°C : NPR 2-T126 Dielectric Strength 2000 VAC Max. Operating Voltage 500 V Insulation Resistance >1000 Meg-Ohm Environmental Performance DR Test Conditions Load Life ±1% 25°C / 90 min ON / 30 min OFF / 1000 hr Humidity Resistance ±1% 40°C / 90-95% RH / DC 0.1W / 1000 hr Temperature Cycle ±0.25% -55°C for 30 min / +155°C for 30 min / 1000 hr Solder Heat ±0.1% +350°C / 3s Vibration ±0.25% Type Power Rating Heatsink1 Free Air2 Thermal Resistance Resistance Range3 Min Max Tolerances Temperature Coefficients NPR 2-T126 20W 1W 5.9K/W 0.01W 51KW ±1% ( R>0.1 W ) ±5% ±50ppm/K ( R>10 W ) ±100ppm/K ( R>0.1 W ) ±250ppm/K NPP 2-T126 5W 0.5W 6.0K/W 0.1W 51KW ( R>5 W ) ±0.5% ( R>1 W ) / ±1% ( R>0.1 W ) ±2% / ±5% ±5 / ±10ppm/K ( R>1 W ) ±25ppm/K ( R>0.1 W ) ±100ppm/K TO-126 Power Film Resistors
Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 791.01 Part Number - Resistance - Tolerance - TCR Example: NPR 2-T126 0.5 Ohm 1% 100ppm SPECIFICATIONS (continued) Power Rating Notes - The NPR 2-T126 Series Foil Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 155°C (120°C for the NPP 2-T126). To specify an appropriate heatsink use the following formula : RqH = TMAX - ( P x RqR ) - TA P Where: R qH = Thermal Resistance of Heatsink ( K/W ) R qR = Thermal Resistance of Resistor ( K/W ) T MAX = Maximum Temperature of Resistor T A = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) -25 0 25 50 75 100 125 150 175 100 120 Power ( % ) Ambient Temperature (°C) NPP 2-T126 NPR 2-T126 Power Derating Curve Mounting Notes - The NPR 2-T126 Series Film Resistors must be attached to a suitable heatsink. Mount resistor using thermal grease to a clean / flat surface. Use a compression washer to provide 150 to 300 pounds ( 665 to 1330N ) of mounting force. Torque mounting screw to 8 in-lbs ( 0.9 Nm ). NPR NPP 2-T126 TO-126 Power Film Resistors