USN UPN 2-0808 Precision Foil Resistors • • • • • • Resistances from 100Ohm to 20kOhms Power Rating to 0.2Watt Resistance Tolerances to ±0.005% TCR to ±0.5ppm/K Load Stability to 0.001% Twin Resistor Construction SPECIFICATIONS Type USN 2-0808 Resistance Range UPN 2-0808 100 Ohms to 20 kOhms Variations Double-resistor with middle-pin (R1-R2) Power rating (70°C) 0.2W (R1+R2) TolerancIes Absolut Ratio from 0.005% from 0.005% from 0.02% from 0.02% Stability (Ratio) 0.001% Shelf Life Stability 25ppm / ∆R after 1 year 50ppm / ∆R after 3 year Temperature Coefficient Absolut Tracking upon request typ. ±3ppm/K < 1.0ppm/K < 0.5ppm/K Insolation Resistance typ. ±5ppm/K < 2.0ppm/K < 1.5ppm/K > 10GOhm Thermal EMF < 0.1µV/K Operating Temperature Range -55 to 155°C Resistor Material NiCr-Foil Substrate Al2O3 Housing Capsule / Epoxy Connector Material Cu tinned Terminals 3 Ordering Information Part Number - Resistance - Tolerance USN 2-0808 2kOhms-4kOhms 0.01% Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 114 rev. 03/2006A USN UPN 2-0808 Precision Foil Resistors SPECIFICATIONS (continued) Derating Power (% from nominal power) 120 100 80 60 40 20 0 25 40 55 70 85 100 115 130 145 155 Am bient Tem perature (°C) Dimensions Dimension mm tol. (±mm) inches tol. (±inches) A 27.20 2.0 1.07 0.079 B 7.49 0.2 0.29 0.008 C 8.13 0.2 0.32 0.008 D 2.00 0.1 0.08 0.004 E 2.54 0.1 0.10 0.004 F 2.54 0.1 0.10 0.004 G Ø0.64 0.1 Ø0.025 0.004 H Riedon Inc. 300 Cypress Avenue Marking of the position of the low ohmic resistor Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 115 rev. 03/2006A