UMA 0204, UMB 0207 www.vishay.com Vishay Beyschlag Ultra Precision Thin Film MELF Resistors FEATURES Most advanced thin film technology Long term stability down to 0.02 % TCR down to 5 ppm/K High precision tolerance down to 0.02 % Operating voltage 350 V for UMB 0207 Material categorization: For definitions of compliance please see www.vishay.com/doc 99912 UMA 0204 and UMB 0207 ultra precision thin film MELF resistors combine the proven reliability of precision MELF APPLICATIONS products with the most advanced level of precision and Measuring and calibration equipment stability first achieved with axial thin film precision resistors. Industrial process control systems This unique combination makes the product perfectly suited for all applications with outstanding requirements towards Space and aircraft electronics reliable precision and stability. Medical equipment TECHNICAL SPECIFICATIONS DESCRIPTION UMA 0204 UMB 0207 DIN size 0204 0207 Metric CECC size RC 3715M RC 6123M Resistance range 22 to 332 k 100 to 390 k Resistance tolerance 0.25 % 0.1 % 0.05 % 0.02 % Temperature coefficient 15 ppm/K 10 ppm/K 5 ppm/K (1) Rated dissipation, P 0.25 W 0.4 W 70 Operating voltage, U AC or DC 200 V 350 V max. RMS (1) Permissible film temperature, 125 C max. Operating temperature range -55 C to 125 C Permissible voltage against ambient (insulation): 1 min U 300 V 500 V ins Continuous 75 V 75 V 9 Failure rate: FIT 0.1 x 10 /h observed Note (1) Please refer to APPLICATION INFORMATION below. Revision: 27-Mar-14 Document Number: 28715 1 For technical questions, contact: melf vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 UMA 0204, UMB 0207 www.vishay.com Vishay Beyschlag APPLICATION INFORMATION The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heat flow support of the printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded. Furthermore a high level of ambient temperature or of power dissipation may raise the temperature of the solder joint, hence special solder alloys or board materials may be required to maintain the reliability of the assembly. These resistors do not feature a lifetime limitation when operated within the limits of rated dissipation, permissible operating voltage and permissible film temperature. However, the resistance typically increases due to the resistors film temperature over operating time, generally known as drift. The drift may exceed the stability requirements of an individual application circuit and thereby limits the functional lifetime. MAXIMUM RESISTANCE AT RATED DISSIPATION Operation mode Precision Standard UMA 0204 0.07 W 0.25 W Rated dissipation, P 70 UMB 0207 0.11 W 0.4 W Applied maximum film temperature, 85 C 125 C F max. Max. resistance change at rated dissipation R/R max. , after: 1000 h 0.02 % 0.05 % 8000 h 0.05 % 0.1 % 225 000 h 0.15 % 0.3 % TEMPERATURE COEFFICIENT AND RESISTANCE RANGE TYPE TCR TOLERANCE RESISTANCE RANGE E-SERIES 15 ppm/K 0.05 % 47 to 332 k 0.25 % 22 to 332 k 10 ppm/K 0.1 % 43 to 332 k 0.05 % 75 to 221 k UMA 0204 0.25 % 33 to 221 k 0.1 % 56 to 221 k 5 ppm/K 0.05 % 75 to 150 k 0.02 % 75 to 100 k E192 15 ppm/K 0.05 % 100 to 390 k 0.25 % 100 to 390 k 10 ppm/K 0.1 % 100 to 390 k 0.05 % 100 to 390 k UMB 0207 0.25 % 270 to 390 k 0.1 % 270 to 390 k 5 ppm/K 0.05 % 270 to 390 k 0.02 % 270 to 390 k Notes TCR 10 ppm/K and TCR 05 ppm/K is specified over the temperature range from -10 C to +85 C. UMA 0204: Approval to EN 140401-803, Version A is achieved for TCR 10 ppm/K with 0.25 % and 0.1 %. Revision: 27-Mar-14 Document Number: 28715 2 For technical questions, contact: melf vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000