FNR2E-0R5F1

FPR FNR 2-T227 4-T227 Foil Power Resistors • • • • • Resistances from 0.001Ohm to 100Ohms Power Rating to 80Watt Resistance Tolerances to ±0.1% TCR to ±25ppm/°C Load Stability to 0.1% SPECIFICATIONS Type Terminals Resistance Range Power Rating (with heatsink) Thermal Resistance Rthj-c FPR 2-T227 FPR 4-T227 FNR 2-T227 FNR 4-T227 2 4 (kelvin connection) 2 4 (kelvin connection) 0.01 to 100 Ohms 0.001 to 50 Ohms 0.01 to 100 Ohms 0.001 to 50 Ohms 60W 80W 1.3 K/W 1.0 K/W 0.1%1 / 1% / 2% / 5% (others upon request) Tolerances (depends on resistance) Stability 0.1% / 0.2% / 0.5% (depends on stress) Temperature Coefficient ² ±25 ppm/K (20 to 60°C) ±50 ppm/K (- 40 to 130°C) FPR 2-T227 / FNR 2-T227 TK Shift depends from resistance value (see graph next page) Voltage Proof 1.5 kV DC ( higher upon request ) Thermal EMF < 1 µV/K Max. Current 45A (85A on request) 50A (100A on request) Operating Temperature -40°C to 130°C Resistor Material Substrate Metalfoil CuNiMn (DIN 17471) Al2O3 Housing AlN Epoxy Connector Material Cu / tinned or nickel plated Max. Torque backplate: 1.5Nm terminals: 1.3 Nm MSL Level MSL 1 1 2 Please inquire for low ohm values Contact office for additinal TCR values Ordering Information Part Description: Part Type - Resistance - Tolerance FPR 2-T227 1.1 Ohms 1% Riedon Inc. © Riedon, Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 www.riedon.com sales@riedon.com (626) 284-1704 Revised: 201801_002 FPR FNR 2-T227 4-T227 Foil Power Resistors SPECIFICATIONS (continued) Temperature Coefficient table A 4000 250 +15ppm/°C 200 TCR - Shift (ppm/K) ∆R/R (ppm) 2000 0 -15ppm/°C -2000 Limit 2 (3σ) -4000 Nominal ∆R/R 150 100 50 -6000 Limit 1 (3σ) 0 -8000 -40 -20 0 20 40 60 80 100 120 140 2 5 10 20 50 100 200 Resistance Value (mOhm) Temperature (°C) Derating and Stability Power Rating Notes - 120 100 Power ( % from nominal power) The FPR/FNR Series Foil Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130°C for a 0.5% stability part. 0.5% 0.2% 80 To specify an appropriate heatsink use the following formula : 0.1% 60 RθH = TMAX - ( P x RθR ) - TA P 40 20 Where: 0 25 50 85 100 115 RθH = Thermal Resistance of Heatsink ( K/W ) RθR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) 130 Tem perature of the backplate (°C) Dimensions and Attachment Variations Dimension FPR/FNR 2-T227 Riedon Inc. © Riedon, Inc. FPR/FNR 4-T227 mm tol. (±mm) inches tol. (±inches) A 26 0.5 1.02 0.020 B 38 0.5 1.50 0.020 C 12.7 0.2 0.50 0.008 D 4 0.2 0.16 0.008 E 30 0.2 1.18 0.008 F 15 0.2 0.59 0.008 G 4.1 0.2 0.16 0.008 H 10 0.2 0.39 0.008 I 8 0.2 0.31 0.008 J 4 0.2 0.16 0.008 K 2 0.2 0.08 0.008 L 0.8 0.1 0.03 0.004 M M4 N 10 0.2 0.39 0.008 O 11.9 0.2 0.47 0.008 M4 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 www.riedon.com sales@riedon.com (626) 284-1704 Revised: 201801_002