UV Series Ceramic Wirewound Resistors RIEDON Flameproof Inorganic Construction Resistances from 0.01 to 91K Ohms Tolerance to ±0.01% Low Temperature Coefficient Power Rating to 10 Watts All Welded Resistance Element Non-Inductive Windings are available Riedon's high quality UV Series power resistors are used for vertical mounting on PC boards where tolerance, TCR, stability and reliability are important. UV series resistance elements are potted into ceramic cases with a special high temperature, inorganic compound that provides high thermal conductivity and humidity resistance. The construction results in a completely flameproof package. The resistance element is a completely welded assembly. The resistance wire is wound on a centerless ground ceramic core with controlled low tension. Leads are solderable and weldable. Both leads are located at one end of the ceramic case, which has stand-offs for vertical mounting on PC boards. SPECIFICATIONS Type Power Rating Resistance ( 70°C ) Range H ± 0.06 Dimensions (in.) L ± 0.04 D ± 0.04 W ± 0.015 UV-2 2 0.01 to 22K 0.80 0.435 0.275 0.200 UV-3 3 0.01 to 22K 1.00 0.475 0.320 0.200 UV-5 5 0.01 to 45K 1.00 0.520 0.350 0.200 UV-10 10 0.01 to 91K 1.38 0.635 0.480 0.300 Standard Tolerance Dielectric Strength Maximum Working Voltage Operating Temperature - ± 1% L ( Tighter Tolerances Available ) 1500 VAC PR -55°C to +275°C Short Term Overload - 5 X rated power for 5 sec. Temperature Coefficient - Consult Factory ( R < 1W ) H 0.177 ± 50ppm/°C ( 1W <= R <= 10W W ± 20ppm/°C ( R > 10W ) Non-Inductive Windings - D Divide Max. Resistance by 2 Part Number - Resistance - Tolerance - TCR Example: UV-5 - 15 Ohm - 1% - 10ppm Power Level % For Non-Inductive Windings, insert the letter N ( i.e. UVN-5 ) 0.032 ( 20 AWG ) Power Derating Curve Multiply Max. Working Voltage by 0.707 Ordering information: +0.060 -0.030 120 100 80 60 40 20 0 0 50 100 150 200 250 300 350 Ambient Temperature °C Riedon Inc. REV 10/02 300 Cypress Avenue Alhambra CA 91801 www.riedon.com (626) 284-9901 Fax: (626) 284-1704