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 stability first achieved with axial thin film precision resistors. Measuring and calibration equipment This unique combination makes the product perfectly suited Industrial process control systems 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 size code RC3715M RC6123M 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 /DC 200 V 350 V max. RMS (1) Permissible film temperature, 125 C max. (1) Operating temperature range -55 C to 125 C Permissible voltage against ambient (insulation): 1 min U 300 V 500 V ins 9 Failure rate: FIT 0.05 x 10 /h observed Note (1) Please refer to APPLICATION INFORMATION below APPLICATION INFORMATION When the resistor dissipates power, a temperature rise above the ambient temperature occurs, dependent on the thermal resistance of the assembled resistor together with the printed circuit board. The rated dissipation applies only if the permitted film temperature is not exceeded. These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime. Revision: 30-Sep-2021 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 MAXIMUM RESISTANCE CHANGE 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 Operating temperature range -55 C to 85 C -55 C to 125 C Permissible film temperature, max. 85 C 125 C F UMA 0204 22 to 332 k 22 to 332 k UMB 0207 100 to 390 k 100 to 390 k Max. resistance change at P for 70 1000 h 0.02 % 0.05 % resistance range, R/R after: 8000 h 0.05 % 0.1 % 225 000 h 0.15 % 0.3 % (1) TEMPERATURE COEFFICIENT AND RESISTANCE RANGE TYPE / SIZE TCR TOLERANCE RESISTANCE 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 E24 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 (1) For the approved IECQ-CECC resistance range, please refer to www.vishay.com/doc 28945 PACKAGING PACKAGING TYPE / SIZE CODE QUANTITY PACKAGING STYLE WIDTH PITCH DIMENSIONS AU 100 Box A1 1000 Antistatic blister tape acc. UMA 0204 8 mm 4 mm 180 mm / 7 IEC 60286-3, Type 2a A3 = AL 3000 A0 10 000 330 mm / 13 BU 100 Box B1 1000 Antistatic blister tape acc. UMB 0207 12 mm 4 mm 180 mm / 7 IEC 60286-3, Type 2a B2 2000 B7 7000 330 mm / 13 Revision: 30-Sep-2021 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