FPR 2-T218 Precision Shunt Resistors • • • • • • Resistances from 0.002Ohm to 50Ohms Power Rating to 30Watt Resistance Tolerances to ±0.25% TCR to ±15ppm/°C Load Stability to 0.1% TO-218 (TO-247) Housing SPECIFICATIONS Type FPR 2-T218 Resistance Range 0.002 to 50 Ohms Power rating free air 70°C with heatsink 2W 30 W Thermal Resistance Rthj-c 2.5 °C/W Tolerances from 0.002 Ohms from 0.01 Ohms from 0.02 Ohms 1% / 2% / 5% 0.5% / 1% / 2% / 5% 0.25% / 0.5% / 1% / 2% / 5% Stability 0.1% / 0.2% / 0.5% (depends on stress) Temperature Coefficient R > 0.2 Ohms ±15ppm/K (20 to 60°C) R ≤ 0.2 Ohms TCR see table A next page Voltage Proof 300 VDC Thermal EMF < 0.1µV/°C Operating Temperature Range -40 to 130°C Resistor Material CuNiMn-Foil Substrate anodized aluminium Housing PPS Connector Material Cu tinned Terminals 2 Max. Torque 1 Nm Derating Power Rating Notes - Power ( % from nominal power) 120 The FPR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130°C. To specify an appropriate heatsink use the following formula : 0.5% 100 0.2% 80 0.1% 60 RqH = TMAX - ( P x RqR ) - TA P 40 20 0 25 50 85 100 115 Temperature of the backplate (°C) 130 Where: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 ) Ordering Information Part Description: Part Type - Resistance - Tolerance FPR 2-T218 0.068 Ohms 0.5% Riedon Inc. 300 Cypress Avenue 06/13 Alhambra CA 91801 (626) 284-9901 www.riedon.com (626) 284-1704 FPR 2-T218 Precision Shunt Resistors SPECIFICATIONS (continued) Temperature Coefficient 4000 2000 +15ppm/K 0 200 TCR - Shift (ppm/°C) ∆R/R (ppm) table A 250 150 -15ppm/K -2000 Limit 2 (3σ) -4000 Nominal ∆R/R -6000 -8000 100 50 Limit 1 (3σ) -40 -20 0 20 40 60 80 100 120 0 140 Temperature (°C) 2 5 10 20 50 100 200 Resistance Value (mOhm) DIMENSIONS Riedon Inc. 300 Cypress Avenue 06/13 Dimension mm tol. (±mm) inches tol. (±inches) A 21.10 0.2 0.83 0.008 B 15.50 0.2 0.61 0.008 C 4.90 0.1 0.19 0.004 D 4.00 0.1 0.16 0.004 E 12.60 0.2 0.50 0.008 F Ø3.2 0.1 Ø0.13 0.004 G 2.95 0.1 0.12 0.004 H 17.75 0.2 0.70 0.008 I 10.16 0.2 0.40 0.008 J 1.40 0.1 0.06 0.004 K 3.00 0.1 0.12 0.004 L 14.50 0.2 0.57 0.008 M 2.80 0.1 0.11 0.004 N 1.65 0.1 0.06 0.004 O 4.60 0.1 0.18 0.004 P 6.15 0.2 0.24 0.008 Q 0.80 0.1 0.03 0.004 R 2.00 0.1 0.08 0.004 Alhambra CA 91801 (626) 284-9901 www.riedon.com (626) 284-1704