RTO 50 www.vishay.com Vishay Sfernice 50 W Power Resistor, Thick Film Technology, TO-220 FEATURES • 50 W at 25 °C heatsink mounted • Adjusted by sand trimming • Leaded or surface mount versions • High power to size ratio • Non inductive element • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 Because of the knowledge and experience in Thick Film technology, Vishay Sfernice has been able to develop a high power resistor in a TO-220 package called RTO 50. The special design of this component allows the dissipation of 50 W when mounted on a heatsink. The ohmic value is adjusted by sand trimming. This process does not generate hot spots as in laser trimming, which could lead to microcracks on each side of the curve. This process improves the reliability and the stability of the resistor and at the same time gives a good overload capability. DIMENSIONS in millimeters RTO 50F - LEADED RTO 50C - FOR SURFACE MOUNTING 4.5 4.5 10.1 Ø 3.6 12.5 10.1 1.3 15 Ø 3.6 12.5 8.8 1.3 15 8.8 2 3 13.7 0.3 1.6 5.08 Ø 0.8 2.5 • Only for RTO 50 version C = during surface mount soldering, the soldering temperature profile must not cause the metal tab of this device to exceed 220 °C. 5.08 STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE RESISTANCE RANGE RATED POWER P25 °C W LIMITING ELEMENT VOLTAGE UL V TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C CRITICAL RESISTANCE RTO 50 TO-220 0.010 to 550K (1) 50 500 1, 2, 5, 10 150 5K Note (1) E24 series MECHANICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Mechanical Protection Resistive Element Connections Weight Dissipation and Associated Molded Thick film Tinned copper alloy 2.2 g max. Onto a heatsink Thermal Resistance and Nominal Power 50 W at +25 °C RTH (j - c): 2.6 °C/W Free air: 2.25 W at +25 °C ENVIRONMENTAL SPECIFICATIONS Dielectric Strength MIL STD 202 (301) 2000 VRMS - 1 min 10 mA max. Temperature Range Insulation Resistance 106 M Inductance 0.1 μH Climatic Category Sealing Flammability -55 °C to 155 °C 55/155/156 Sealed container, solder immersion IEC 60695-11-5, 2 applications 30 s separated by 60 s DIMENSIONS Standard Package TO-220 insulated case Note • Not compatible with RoHS reflow profile. Revision: 18-Sep-15 Document Number: 50035 1 For technical questions, contact: [email protected] 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 RTO 50 www.vishay.com Vishay Sfernice PERFORMANCE TESTS CONDITIONS REQUIREMENTS EN 60115-1 2 Pr 5 s for R < 2 1.6 Pr 5 s for R 2 US < 1.5 UL ± (0.25 % + 0.05 ) EN 60115-1 60 068-2-14 5 cycles -55 °C to +155 °C ± (0.5 % + 0.05 ) EN 60115-1 Pr at +25 °C, 1000 h CEI 115_1 ± (1 % + 0.05 ) EN 60115-1 56 days RH 95 % ± (0.5 % + 0.05 ) Vibration MIL STD 202 method 204 C test D ± (0.2 % + 0.05 ) Terminal Strength MIL STD 202 method 211 test A1 ± (0.2 % + 0.05 ) Momentary Overload Rapid Temperature Change Load Life Humidity (Steady State) RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR 0.01 Resistance Values 0.015 Tolerances Temperature Coefficient (-55 °C to +155 °C) 0.1 0.5 ± 250 ppm/°C ± 150 ppm/°C ± 1 % at ± 10 % Standard ± 900 ppm/°C ± 700 ppm/°C CHOICE OF THE HEATSINK The user must choose according to the working conditions of the component (power, room temperature). Maximum working temperature must not exceed 155 °C. The dissipated power is simply calculated by the following ratio: 1 T P = ------------------------------------------------------------------------------------------R TH (j - c) + R TH (c - h) + R TH (h - a) P: T: RTH (j - c): RTH (c - h): RTH (h - a): Expressed in W Difference between maximum working temperature and room temperature Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal resistance of the component: (Special Features Table) Thermal resistance value measured between outer side of the resistor and upper side of the heatsink. This is the thermal resistance of the interface (grease, thermal pad), and the quality of the fastening device Thermal resistance of the heatsink Example: RTH (c - a): For RTO 50 power rating 13 W at ambient temperature +30 °C Thermal resistance RTH (j - c): 2.6 °C/W Considering equation (1) we have: T 155 °C - 30 °C = 125 °C T -------- = 9.6 °C/W RTH (j - c) + RTH (c - h) + RTH (h - a) = ------- = 125 P 13 RTH (c - a) + RTH (h - a) 9 .6 °C/W - 2.6 °C/W 7 °C/W Revision: 18-Sep-15 Document Number: 50035 2 For technical questions, contact: [email protected] 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 RTO 50 www.vishay.com Vishay Sfernice OVERLOADS POWER RATING The applied voltage must always be lower than the maximum overload voltage of 750 V. The values indicated on the graph below are applicable to resistors in air or mounted onto a heatsink. The temperature of the heatsink should be maintained within the limits specified. To improve the thermal conductivity, surfaces in contact should be coated with a silicone grease and the torque applied on the screw for tightening should be around 1 Nm. MARKING Model, style, resistance value (in ), tolerance (in %), manufacturing date, Vishay Sfernice trademark. RATED POWER IN % ENERGY CURVE 100 ENERGY IN JOULES 100 10 1 80 60 40 20 0.1 0 0 25 0.01 0.001 10-7 50 100 150 200 HEATSINK TEMPERATURE IN °C 10-6 10-5 10-4 10-3 10-2 10-1 OVERLOAD DURATION IN s PACKAGING Tube of 50 units POWER CURVE POWER IN W 100 000 10 000 1000 100 10-7 10-6 10-5 10-4 10-3 10-2 10-1 OVERLOAD DURATION IN s Revision: 18-Sep-15 Document Number: 50035 3 For technical questions, contact: [email protected] 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 RTO 50 www.vishay.com Vishay Sfernice ORDERING INFORMATION RTO 50 F 100K ± 1% XXX TU50 e1 MODEL STYLE CONNECTIONS RESISTANCE VALUE TOLERANCE CUSTOM DESIGN Optional on request: Special TCR, shape, etc. PACKAGING LEAD (Pb)-FREE ± 1% ± 2% ± 5% ± 10% F: Radial leads C: Surface mount GLOBAL PART NUMBER INFORMATION R T O 0 5 0 F R 6 8 0 0 J T E 1 GLOBAL MODEL SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING RTO 050 F = Radial leads C = Surface mount The first four digits are significant figures and the last digit specifies the number of zeros to follow. R designates decimal point. 48R70 = 48.7 48701 = 48 700 10002 = 100 000 R0100 = 0.01 R6800 = 0.68 27000 = 2700 = 2.7 k F=1% G=2% J=5% K = 10 % T = Tube Revision: 18-Sep-15 Size 30 and 50: Tube 50 pieces Document Number: 50035 4 For technical questions, contact: [email protected] 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 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. 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