NPR NHR NPS NHS 2-T220 T221 Powertron * * * * * * * Resistances from 0.02Ohm to 100kOhms Power Rating to 50Watt Resistance Tolerances to 1% TCR to 50ppm/K Load Stability to 0.5% TO-220 Housing Convenient SMD D2Pak Available SPECIFICATIONS Type Resistance Range NPR / NPS NHR / NHS 0.02 Ohms to 100kOhms 0.02 Ohms to 15kOhms 1.5 W 30 W 1.5 W 50 W 3.5 K/W 2.1 K/W Power rating free air 70C with heatsink Thermal Resistance Rthj-c 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/K 300 ppm/K 100 ppm/K upon request 50 ppm/K Voltage Proof 2.0 kVDC Max. Voltage depending on resistance value max. working voltage (VDC) 10000 1000 100 10 1 2 Ohm Operating Temperature Range Resistor Material 1.5 kVDC 10 Ohm 100 Ohm Connector Material 10 kOhm 100 kOhm Thick Film Al2O3 Epoxy or PPS Cu tinned Terminals Max. Torque 5 kOhm -40 to 155C Substrate Housing 1 kOhm 2 T220: 1 Nm T221: 0.8 Nm Ordering Information Part Number - Resistance - Contact - Tolerance: NHR 2-T221 C 1.1 kOhms 1% Document Number: 64213 Revision: 20-09-10 For technical questions, contact: powertron@vishaypg.com www.powertron.de 1 NPR NHR NPS NHS 2-T220 T221 Powertron SPECIFICATIONS (continued) Temperature Coefficient 100ppm/K R/R (ppm) 7000 50ppm/K 2000 -3000 -8000 -50 -25 0 25 Derating 120 Power ( % from nominal power) 50 75 Temperature (C) 100 125 Power Rating Notes - The NPR / NHR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 155C. To specify an appropriate heatsink use the following formula : 100 80 60 RqH = TMAX - ( P x RqR ) - TA P 40 20 0 25 50 85 100 115 130 145 155 Where: Temperature of the backplate (C) RqH = Thermal Resistance of Heatsink ( K/W ) RqR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( C ) P = Power Through Resistor ( W ) Dimensions NPS / NHS 2-T220 Dimension mm tol. (mm) inches tol. (inches) A 12.70 0.2 0.50 0.008 Dimension mm inches 0.008 A 12.10 0.476 11.16 0.439 B www.powertron.de 2 10.16 0.2 0.40 C 0.76 0.1 0.03 0.004 B D 5.08 0.1 0.20 0.004 C 18.33 0.722 E 4.00 0.1 0.16 0.004 D 5.08 0.200 F 1.20 0.1 0.05 0.004 E 1.76 0.069 G 14.60 0.2 0.57 0.008 F 3.20 0.126 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 For technical questions, contact: powertron@vishaypg.com Document Number: 64213 Revision: 20-09-10 NPR NHR NPS NHS 2-T220 T221 Powertron SPECIFICATIONS (continued) NPR / NHR 2-T220 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 O3.7 0.1 O0.146 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 10.00 0.2 0.39 0.008 I (C-Contact) 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) NPR / NHR 2-T221 Document Number: 64213 Revision: 20-09-10 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 O3.2 0.1 O0.126 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 10.00 0.2 0.39 0.008 I (C-Contact) 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 For technical questions, contact: powertron@vishaypg.com www.powertron.de 3 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay Precision Group"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. 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Please contact authorized Vishay Precision Group personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document No.: 63999 Revision: 27-Apr-11 www.vishaypg.com 1