NPR2-T220_13 RIEDON | Alldatasheet

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Technical content

Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 80 NPR NPS 2-T220 NHR NHS 2-T220 T221 Power Resistors Type NPR / NPS NHR / NHS Resistance Range 0.02 Ohms to 100kOhms 0.02 Ohms to 15kOhms Power rating free air 70°C with heatsink 1.5 W 30 W 1.5 W 50 W Thermal Resistance Rthj-c 3.5 K/W 2.1 K/W Tolerances from 0.02 Ohms from 1.0 Ohms 2% / 5% 1% / 2% / 5% Stability 0.5% Temperature Coefficient 0.02 to 0.049 Ohms 0.05 to 0.099 Ohms

0.1 Ohms to 100 kOhms

±600 ppm/°C ±300 ppm/°C ±100 ppm/°C upon request ±50 ppm/°C Voltage Proof 2.0 kVDC 1.5 kVDC Max. Voltage depending on resistance value 100 1000 10000

2 Ohm 10 Ohm 100 Ohm 1 kOhm 5 kOhm 10 kOhm 100 kOhm

max. working voltage (VDC) Operating Temperature Range -40 to 155°C Resistor Material Thick Film Substrate Al2O3 Housing Epoxy or PPS Connector Material Cu tinned Terminals 2 Max. Torque T220: 1 Nm T221: 0.8 Nm SPECIFICATIONS Part Description: Part Type - Resistance - Contact - Tolerance NHR 2-T221 C 1.1 kOhms 1%

Ordering Information

  • Resistances from 0.02Ohm to 100kOhms
  • Power Rating to 50Watt
  • Resistance Tolerances to ±1%
  • TCR to ±50ppm/°C
  • Load Stability to 0.5%
  • TO-220 Housing
  • Convenient SMD D2Pak Available Power Resistors

Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 81 100 120 25 50 85 100 115 130 145 155 Temperature of the backplate (°C) Power ( % from nominal power) Temperature Coefficient SPECIFICATIONS (continued) NPR NPS 2-T220 T221 NHR NHS 2-T220 T221 Derating Power Resistors -8000 -3000 2000 7000 -50 -25 0 25 50 75 100 125 50ppm/°C 100ppm/°C ∆R/R (ppm) Temperature (°C) Dimension mm tol. (±mm) inches tol. (±inches) A 12.70 0.2 0.50 0.008 B 10.16 0.2 0.40 0.008 C 0.76 0.1 0.03 0.004 D 5.08 0.1 0.20 0.004 E 4.00 0.1 0.16 0.004 F 1.20 0.1 0.05 0.004 G 14.60 0.2 0.57 0.008 H 15.00 0.2 0.59 0.008 I 17.33 0.2 0.68 0.008 J 0.40 0.1 0.02 0.004 K 1.85 0.1 0.07 0.004 Dimension mm inches A 12.10 0.476 B 11.16 0.439 C 18.33 0.722 D 5.08 0.200 E 1.76 0.069 F 3.20 0.126 NPS / NHS 2-T220 Dimensions Power Rating Notes - The NPR / NHR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 155°C. 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 )

Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 82 SPECIFICATIONS (continued) NPR NPS 2-T220 T221 NHR NHS 2-T220 T221 Power Resistors NPR / NHR 2-T220 NPR / NHR 2-T221 Dimension mm tol. (±mm) inches tol. (±inches) A 17.30 0.2 0.68 0.008 B 10.16 0.2 0.40 0.008 C 6.00 0.1 0.24 0.004 D Ø3.7 0.1 Ø0.146 0.004 E 16.40 0.2 0.65 0.008 F 5.08 0.1 0.20 0.004 G 0.76 0.1 0.03 0.004 H 1.30 0.1 0.05 0.004 I 13.80 0.2 0.54 0.008 J 2.00 0.1 0.08 0.004 K 1.20 0.1 0.05 0.004 L 4.00 0.1 0.16 0.004 M 2.90 0.1 0.11 0.004 N 0.40 0.1 0.02 0.004 O 1.85 0.1 0.07 0.004 Dimension mm tol. (±mm) inches tol. (±inches) A 18.30 0.2 0.72 0.008 B 10.16 0.2 0.40 0.008 C 3.70 0.1 0.15 0.004 D Ø3.2 0.1 Ø0.126 0.004 E 16.40 0.2 0.65 0.008 F 5.08 0.1 0.20 0.004 G 0.76 0.1 0.03 0.004 H 1.30 0.1 0.05 0.004 I 13.80 0.2 0.54 0.008 J 2.00 0.1 0.08 0.004 K 1.20 0.1 0.05 0.004 L 4.00 0.1 0.16 0.004 M 3.90 0.1 0.15 0.004 N 0.40 0.1 0.02 0.004 O 1.85 0.1 0.07 0.004