PRELIMINARY DATA SHEET MODEL BPR SERIES Noninductive Planar Shock / Vibration Proof Thick Film, High Power Resistor Network STANDARD TYPES BPR 3 3 Watts BPR 5 5 Watts BPR 7 7.5 Watts BPR 10 10 Watts BPR 20 20 Watts BPR 30 30 Watts BPR 40 40 Watts BPR 50 50 Watts FEATURES 5 High power density Power is dissipated above circuit board Low temperature solder Nonammable Noninductive planar Ideal for high shock and vibration environments APPLICATIONS Inrush current suppression and limiters Switching power supplies Snubber circuits Specications subject to change without notice. Consult factory for custom products, nonstandard values and tolerances. Last update: 6/24/2002. 5-11 Model BPR SeriesELECTRICAL Resistance Range, Ohms 1 to 200K Resistance Tolerances 5% Optional: 1%, 2% Operating Temperature Range -55C to +155C Temperature Coefcient of Resistance, Maximum 100ppm/C Power Ratings, Watts 3W, 5W, 7.5W, 10W, 20W, 30W, 40W, 50W at 70C Operating Voltage, Maximum 500 Vdc or PR , whichever is less Peak Current 15 x rated current up to 8 ms ( R 0.5% Dielectric Strength 750 V MECHANICAL Lead Material Solder Tinned phosphor bronze Substrate Material 96% Alumina Resistor Material Ruthenium Oxide ENVIRONMENTAL (PER MIL-R-83401) Thermal Shock R 0.50% Terminal Strength R 0.25% Short Time Overload, Maximum 2 x rated voltage for 5 seconds, R 0.25% Moisture Resistance R 0.50% Mechanical Shock 100G s, R 0.25% Vibration 20G s, 10 Hz to 2 kHz, R 0.25% Low Temperature Storage R 0.25% High Temperature Exposure R 0.25% Load Life, 1,000 Hours R 2.00% Resistance to Solder Heat R 0.25% Dielectric Withstanding Voltage, Minimum 1,000 Vdc Marking Permanency MIL-STD-202, Method 215 Lead Solderability MIL-STD-202, Method 208 Flammability UL 94V-0 Rated Storage -55C to +155C 5-12 Model BPR Series