UB Series Silicone Coated Power Resistors • • • • • • • Resistances from 0.005 to 260kOhms Power Rating 1 to 18Watts Resistance Tolerances to ± 0.01% Low TCR: ± 20ppm/K Standard MIL-R-26 / MIL-R-39007 Power Ratings Temperature Range: -55°C to +350°C ( “V” Rating ) Non-Inductive Windings Available SPECIFICATIONS Type Wattage Rating ( Watts ) Dimensions Maximum Ohms 2 A B C 1 Maximum Working Voltage MIL-R-26 / MIL-R-39007 Style ±0.062” [±1.6mm] ±0.031” [±0.8mm] ±0.002” [±0.05mm] 3.4k 0.250 [6.4] 0.085 [2.2] 0.020 [0.5] 0.025 [0.6] 33 RW-81 RWR-81 2 7.5k 0.312 [7.9] 0.078 [2.0] 0.020 [0.5] 0.025 [0.6] 42 RWR-82 2 3 10k 0.406 [10.3] 0.094 [2.4] 0.025 [0.6] 0.020 [0.5] 80 RW-80 RWR-80 UB-5 4 5 25k 0.560 [14.2] 0.187 [4.7] 0.032 [0.8] 162 UB-5C 5 7 32k 0.500 [12.7] 0.218 [5.5] 0.032 [0.8] 194 UB-6 6 8 50k 0.625 [15.9] 0.250 [6.4] 0.040 [1.0] 258 UB-10 7 10 95k 0.875 [22.2] 0.312 [7.9] 0.040 [1.0] 425 UB-12 10 12 150k 1.220 [31.0] 0.312 [7.9] 0.040 [1.0] 607 UB-15 15 18 260k 1.780 [45.2] 0.375 [9.5] 0.040 [1.0] 1050 U V UB-1 1 1.5 UB-23 1.5 UB-3 RW-84 Lead Diameter: 18 AWG = 0.040” / 20 AWG = 0.032” / 22 AWG = 0.025” / 24 AWG = 0.020” Where more than one lead is listed / the top value is Standard 2 For non-inductive windings / divide maximum resistance by 2 3 This part does not meet the RoHS directive - call factory for details 1 Ordering Information For Non-Inductive Windings / insert the letter “N” ( i.e. UBN-5 ) Part Number - Resistance - Tolerance - TCR ( If not standard ) Example: UB-3 10 Ohm 1% Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 103 rev. 03/2006A UB Series Silicone Coated Power Resistors SPECIFICATIONS (continued) Specification Value Tolerances ±0.01% to ±10% ( 1% Standard ) Temperature Coefficient >10W : ±20ppm/K 1W to10W : ±50ppm/K <1W : Call Factory Temperature Range -55°C to +250°C : Characteristic U -55°C to +350°C : Characteristic V Dielectric Strength 500 VAC : UB-1 / UB-2 / UB-3 1000 VAC : All Others Constuction Centerless ground ceramic core Tinned copper or copperweld leads High temperature / trivalent / inorganic Silicone coating All welded terminations DR Environmental Performance (MIL-STD 202) Characteristic U Characteristic V Dielectric ±0.2% + 0.05W ±0.2% + 0.05W Load Life to ±1% depending on size and Resistance Value Storage ±0.2% + 0.05W ±2% + 0.05W Moisture Resistance ±0.2% + 0.05W ±2% + 0.05W Thermal Shock ±0.2% + 0.05W ±2% + 0.05W 5X Overload ( 5s ) ±0.2% + 0.05W ±2% + 0.05W Shock ±0.1% + 0.05W ±0.2% + 0.05W Vibration ±0.1% + 0.05W ±0.2% + 0.05W Power Derating Curve 120 Power ( % ) 100 80 CH AR 60 CH AR 40 V U 20 0 0 50 100 150 200 250 300 350 400 Ambient Temperature (°C) Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 104 rev. 03/2006A