RTOP www.vishay.com Vishay Sfernice Power Resistors for Mounting onto a Heatsink Thick Film Technology FEATURES • 1 % tolerance available • High power rating = 200 W • Wide ohmic value range = 0.046 to 1 M • Non inductive • Easy mounting • Low thermal radiation of the case • Standard isotop case (SOT-227 B) • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 This series of thick film power resistors include modules which can incorporate up to 2 different resistor values in the same SOT-227B package. Two types of terminations are available along with a 4 terminal device for measurement applications in the case of the single resistor version. This product range benefits from Vishay Sfernice’s experience in thick film power resistor technology i.e. high power: volume ratio, low tolerance or individual resistors and excellent overload capabilities (due to the trimming technique). DIMENSIONS in millimeters RTOP V Connections 10 12.6 4 15 ± 0.3 12.6 25 30 38 Ø 4.2 Note • Tolerances unless otherwise specified: ± 0.3 mm STANDARD ELECTRICAL SPECIFICATIONS MODEL DRTOP50 RTOP100 DRTOP100 RTOP200 SIZE SOT-227B RATED POWER P25 °C W TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C 0.091 to 1M 50 1, 2, 5, 10 150, 300 0.046 to 1M 100 1, 2, 5, 10 150, 300 0.046 to 1M 200 1, 2, 5, 10 150, 300 RESISTANCE RANGE MECHANICAL SPECIFICATIONS ENVIRONMENTAL SPECIFICATIONS Mechanical Protection Insulated case Resistive Element Cermet Substrate Alumina on insulated base End Connections V connections: screw M4 x 6 Tightening Torque Connections 1 Nm Tightening Torque Heatsink 2 Nm Weight 30 g max. Temperature Range Revision: 09-Nov-15 -55 °C to +125 °C Climatic Category 55/125/56 TECHNICAL SPECIFICATIONS Temperature Coefficient (-55 °C to +125 °C) Insulation Resistance Standard ± 300 ppm/°C (R < 1) ± 150 ppm/°C (R > 1) > 106 M Document Number: 50045 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 RTOP www.vishay.com Vishay Sfernice PERFORMANCE TESTS CONDITIONS REQUIREMENTS IEC 60115-1 2.5 Pr/5 s US < 2 UL < ± (0.25 % + 0.05 ) IEC 60115-1 5 cycles -55 °C +125 °C < ± (0.25 % + 0.05 ) IEC 60115-1 Pr at 25 °C 1000 h < ± (0.5 % + 0.05 ) IEC 60115-1/IEC 60068-2-3 Test Ca 56 days 95 % RH/40 °C < ± (0.5 % + 0.05 ) Momentary Overload Rapid Temperature Change Load Life Humidity (Steady State) SPECIAL FEATURES MODEL RTOP 200 RTOP 100 DRTOP 100 DRTOP 50 200 W 5W 100 W 5W 100 W 3.5 W 50 W 3.5 W 0.5 °C/W 1 °C/W 0.5 °C/W 1 °C/W 1500 V 1500 V 500 V 500 V Dielectric Strength (1) Connections/Chassis 2500 V, 1 min 10 mA max. 2500 V, 1 min 10 mA max. 2500 V, 1 min 10 mA max. 2500 V, 1 min 10 mA max. Dielectric Strength (1) Connections/Resistors - - 2500 V, 1 min 10 mA max. 2500 V, 1 min 10 mA max. Power Rating at +25 °C Chassis Mounted Resistors Unmounted Resistors Thermal Resistance (per Resistor) Limiting Voltage UL Ohmic Value Range 0.046 to 1 M 0.091 to 1 M Tolerance ± 1 % to ± 10 % ± 1 % to ± 10 % R R2 R1 Electrical Diagrams R Shunt version Note (1) MIL-STD-202 Method 301 Revision: 09-Nov-15 Document Number: 50045 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 RTOP www.vishay.com Vishay Sfernice RECOMMENDATIONS FOR MOUNTING ONTO A HEATSINK • Surfaces in contact must be carefully cleaned. • The heatsink must have an acceptable flatness: From 0.05 mm to 0.1 mm/100 mm. • Roughness of the heatsink must be around 6.3 μm. In order to improve thermal conductivity, surfaces in contact (alumina, heatsink) should be coated with a silicone grease (type SI 340 from Rhône-Poulenc or Dow 340 from Dow Corning). RTOP Tightening Torque on Heatsink 2 Nm • For the electrical connections, it is recommended to use M4 x 6 screws and if necessary a washer of 1mm thickness. The recommended screw tightening torque is 1 Nm. CHOICE OF THE HEATSINK The user must choose the heatsink according to the working conditions of the component (power, room temperature). Maximum working temperature must not exceed 125 °C. The dissipated power is simply calculated by the following ratio: T P = ------------------------------------------------------------------------------------------R TH (j - c) + R TH (c - h) + R TH (h - a) P: Expressed in W T: Difference between maximum working temperature and room temperature. RTH (j - c): Thermal resistance value measured between resistive layer and outer side of the resistor. It is the thermal resistance of the component (see table Special Features). RTH (c - h): 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. RTH (h - a): Thermal resistance of the heatsink. Example: RTH (c - a): For RTOP 200 power rating 130 W at ambient temperature + 30 °C. Thermal resistance (see table 1) RTH (j - c): 0.5 °C/W T = 125 °C - 30 °C 95 °C T 95 RTH (j - c) + RTH (c - h) + RTH (h - a) = ------- = ------- = 0.73 °C/W P 130 RTH (j - c) = 0.112 °C/W RTH (c - h) + RTH (h - a) = 0.73 °C/W - 0.5 °C/W 0.23 °C/W Revision: 09-Nov-15 Document Number: 50045 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 RTOP www.vishay.com Vishay Sfernice OVERLOADS POWER RATING The applied power is 2.5 x rated power for 5 s with a max. voltage of 2 x nominal voltage. Accidental overload: The values indicated in the graph below are applicable to resistors in air or mounted onto a heatsink. In case of multi-resistor devices, (DRTOP, TROP and QROP) the results apply to each resistor value in the device. The temperature of the heater should be maintained in the limit specified. To improve the thermal conductivity, surfaces in contact should be laid on with a silicon grease and the torque applied on the screw for tightening should be around 2 Nm. 100 RATED POWER IN % ENERGY CURVE ENERGY IN JOULES 1000 100 RTOP 10 DRTOP 1 80 60 40 20 0.1 0 0 0.01 10-7 20 40 60 80 100 120 140 HEATSINK TEMPERATURE IN °C 10-6 10-5 10-4 10-3 10-2 10-1 100 OVERLOAD DURATION IN s PACKAGING POWER CURVE Box of 10 units 1 000 000 POWER IN W 100 000 10 000 RTOP DRTOP 1000 100 10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 OVERLOAD DURATION IN s MARKING Series, style, ohmic value (in), tolerance manufacturing date, Vishay Sfernice trademark. Revision: 09-Nov-15 (in %), Document Number: 50045 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 RTOP www.vishay.com Vishay Sfernice ORDERING INFORMATION RTOP 200 5U ±1% DRTOP 50 150U 5% ±% 15U 5% R1 MODEL STYLE RTOP DRTOP 100 50 OHMIC VALUE V T1 ABSOLUTE TOLERANCE PER RESISTOR Optional ±1% ±2% ±5% ± 10 % V XXX BO10 e CONNECTIONS CUSTOM DESIGN PACKAGING LEAD (Pb)-FREE V: screw VS: RTOP shunt Optional R2 To be precise for each resistor GLOBAL PART NUMBER INFORMATION R GLOBAL MODEL RTOP Revision: 09-Nov-15 T O P 1 0 0 V 5 R 0 0 K B SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING SPECIAL 100 200 V = screw VS = RTOP shunt The first three digits are significant figures and the last digit specifies the number of zeros to follow. R designates decimal point. 48R7 = 48.7 4871 = 4870 1002 = 10 000 R010 = 0.01 R680 = 0.68 2701 = 2.7 k F=1% G=2% J=5% K = 10 % B = box 10 pieces As applicable Ex = UA1 Document Number: 50045 5 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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