USR 4-1414 Precision Shunt Resistors • • • • • Resistances from 0.5Ohm to 100Ohms Power Rating to 25Watt Resistance Tolerances to ±0.01% TCR to ±1ppm/K Load Stability to 0.01% SPECIFICATIONS Type USR 4-1414 Resistance Range 0.5 to 100 Ohms Power rating free air 70°C with heatsink 0.8 W 25 W Thermal Resistance Rthj-c Tolerances from 0.5 Ohms from 1.0 Ohms < 4.2 K/W 0.1% / 0.25% / 0.5% / 1% 0.01% / 0.02% / 0.05% / 0.1% / 0.25% / 0.5% / 1% Stability 0.01% Temperature Coefficient max. ±5ppm/K (-55 to 155°C) typ. ±3ppm/K (-55 to 125°C) upon request ±1ppm/K (0 to 60°C) Voltage Proof 1.5 kVDC Thermal EMF < 0.1µV/K Operating Temperature Range -55 to 155°C Resistor Material NiCr-Foil Substrate Al2O3 upon request: AlN Housing Plastic / Epoxy Connector Material Cu tinned Terminals 4 Ordering Information Part Number - Resistance - Tolerance - TCR USR 4-1414 0.5Ohms 0.5% 1ppm Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 118 rev. 03/2006A USR 4-1414 Precision Shunt Resistors SPECIFICATIONS (continued) Temperature Coefficient 800 ∆R/R (ppm) 600 +5ppm/K -5ppm/K 400 200 Nominal Spread ±2.3ppm/K 0 -200 Nominal ∆R/R -400 Nominal Spread ±2.3ppm/K -600 -800 -50 0 -25 25 50 100 75 125 Temperature (°C) Derating without Heatsink Power (% from nominal power) Power (% from nominal power) 120 with Heatsink 100 80 60 40 20 0 120 100 80 60 40 20 0 50 70 85 100 115 130 145 155 25 Ambient Temperature (°C) 50 85 100 115 130 145 155 Temperature of the backplate(°C) Dimensions Riedon Inc. 300 Cypress Avenue Dimension mm tol. (±mm) inches tol. (±inches) A 94.00 0.5 3.70 0.020 B 14.00 0.2 0.55 0.008 C 4.50 0.1 0.18 0.004 D Ø0.80 0.1 Ø0.03 0.004 E 6.30 0.2 0.25 0.008 F 1.50 0.2 0.06 0.008 G 14.00 0.2 0.55 0.008 Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 119 rev. 03/2006A