LTO 100 www.vishay.com Vishay Sfernice Power Resistor Thick Film Technology FEATURES * 100 W at 25 C case temperature heatsink mounted * Direct mounting ceramic on heatsink * Broad resistance range: 0.015 to 1 M * Non inductive * TO-247 package: compact and easy to mount * AEC-Q200 qualified DESIGN SUPPORT TOOLS * Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 click logo to get started Models Available LTO series are the extension of RTO types. We used the direct ceramic mounting design (no metal tab) of our RCH power resistors applied to semiconductor packages. DIMENSIONS in millimeters 5.0 15.76 5.33 20.7 O 3.6 3.6 3.5 14.5 1.5 0.6 2.4 10.16 Note * Tolerances unless stated: 0.3 mm STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE RESISTANCE RANGE LTO 100 TO-247 0.015 to 1 M RATED POWER LIMITING ELEMENT TOLERANCE P25 C VOLTAGE UL % W V 100 500 1, 2, 5, 10 TEMPERATURE COEFFICIENT ppm/C CRITICAL RESISTANCE 200, 350, 900 2.5 K MECHANICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Mechanical Protection Dissipation and Associated Resistive Element Substrate Connections Weight Mounting Torqure Molded Thick film Alumina Tinned copper 3.5 g max. 1 Nm Power Rating and Thermal Resistance of the Component Temperature Coefficient Onto a heatsink 100 W at +25 C (case temp.) RTH (j - c): 1.5 C/W Free air: 3.5 W at +25 C See Performance table 150 ppm/C ENVIRONMENTAL SPECIFICATIONS Dielectric Strength MIL STD 202 3000 VRMS - 1 min 10 mA max. Temperature Range Insulation Resistance 104 M Inductance 0.1 H Climatic Category Flammability Revision: 16-Nov-17 -55 C to +175 C 55 / 175 / 56 IEC 60695-11-5 2 applications 30 s separated by 60 s Document Number: 50051 1 For technical questions, contact: sferfixedresistors@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 LTO 100 www.vishay.com Vishay Sfernice PERFORMANCE TESTS Momentary Overload Load Life High Temperature Exposure Temperature Cycling Biased Humidity Operational Life ESD Human Body Model Vibration Mechanical Shock Terminal Strength CONDITIONS EN 60115-1 1.5 Pr/5 s US < 1.5 UL EN 60115-1 1000 h Pr at +25 C AEC-Q200 REV D conditions: MIL-STD-202 method 108 1000 h, +175 C, unpowered AEC-Q200 REV D conditions: JESD22 method JA-104 1000 cycles, -55 C to +125 C dwell time -15 min AEC-Q200 REV D conditions: MIL-STD-202 method 103 1000 h, 85 C, 85 % RH AEC-Q200 REV D conditions: MIL-STD-202 method 108 2000 h, 90/30, powered, +125 C AEC-Q200 REV D conditions: AEC-Q200-002 25 kVAD AEC-Q200 REV D conditions: MIL-STD-202 method 204 5 g's for 20 min, 12 cycles test from 10 Hz to 2000 Hz AEC-Q200 REV D conditions: MIL-STD-202 method 213 100 g's, 6 ms, 3.75 m/s 3 shocks/direction AEC-Q200 REV D conditions: AEC-Q200-006 2 kgf, 60 sec REQUIREMENTS (0.5 % + 0.005 ) (1 % + 0.005 ) (0.25 % + 0.005 ) (1 % + 0.005 ) (1 % +0.005 ) (1 % +0.005 ) (0.5 % +0.005 ) (0.5 % +0.005 ) (0.5 % +0.005 ) (0.25 % +0.01 ) SPECIAL FEATURES Resistance Values Tolerances Typical Temperature Coefficient (-55 to +175 C) 0.015 0.1 1 % at 10 % > 20 900 ppm/C 350 ppm/C 200 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 175 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: 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. 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 - h) + RTH (h - a) for LTO 100 power rating 10 W at ambient temperature +25 C Thermal resistance RTH (j - c): 1.5 C/W Considering equation (1) we have: T = 175 C - 25 C = 150 C 150 T RTH (j - c) + RTH (c - h) + RTH (h - a) = ------- = ----------- = 15 C/W 10 P RTH (c - h) + RTH (h - a) = 15 C/W - 1.5 C/W = 13.5 C/W with a thermal grease RTH (c - h) = 1 C/W, we need a heatsink with RTH (h - a) = 12.5 C/W. Revision: 16-Nov-17 Document Number: 50051 2 For technical questions, contact: sferfixedresistors@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 LTO 100 www.vishay.com Vishay Sfernice OVERLOADS POWER RATING In any case the applied voltage must 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 case 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. ENERGY CURVE 125 100 10 RATED POWER IN % ENERGY IN JOULES 100 1 0.1 0.01 10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 75 50 25 0 0 20 40 OVERLOAD DURATION IN s 60 80 100 120 140 160 175 CASE TEMPERATURE IN C POWER CURVE 1 000 000 PACKAGING Tube of 30 units POWER IN W 100 000 MARKING 10 000 Model, style, resistance value (in ), tolerance (in %), manufacturing date, Vishay Sfernice trademark. 1000 100 10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 OVERLOAD DURATION IN s Revision: 16-Nov-17 Document Number: 50051 3 For technical questions, contact: sferfixedresistors@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 LTO 100 www.vishay.com Vishay Sfernice ORDERING INFORMATION LTO 100 F 2.7 k 1% xxx TU30 e3 MODEL STYLE CONNECTIONS RESISTANCE VALUE TOLERANCE CUSTOM DESIGN PACKAGING LEAD (Pb)-FREE 1% 2% 5% 10 % Optional on request: special TCR, shape etc. GLOBAL PART NUMBER INFORMATION L T O 1 0 0 F 2 7 0 0 0 J T E 3 GLOBAL MODEL SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING LEAD (Pb)-FREE LTO 100 F = radial leads 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 R4700 = 0.47 27000 = 2700 = 2.7 k F=1% G=2% J=5% K = 10 % T = tube E3 = pure tin Revision: 16-Nov-17 Tube 30 pieces Document Number: 50051 4 For technical questions, contact: sferfixedresistors@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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