LPS 600 Vishay Sfernice Power Resistor for Mounting onto a Heatsink Thick Film Technology FEATURES • 600 W at 85 °C bottom case temperature • Wide resistance range: 0.3 Ω to 900 kΩ E24 series • Non inductive • Easy mounting • Low thermal radiation of the case • Compliant to RoHS directive 2002/95/EC DIMENSIONS in millimeters 25.8 ± 1 LPS 600 6K8 5 % V2 60 25.2 21.2 15.2 36 64.7 2 x M4 useful depth: 8 2 x Ø 4.2 Ø 20 13.6 34 57 Note • Tolerances unless stated: ± 0.2 mm MECHANICAL SPECIFICATIONS Mechanical Protection Resistive Element Substrate End Connections Tightening Torque - On Connections - On Heatsink Maximum Torque Weight Insulated case UL 94 V-0 Thick film Alumina Screws M4 2 Nm 2 Nm 2.5 Nm 83 g ± 10 % ELECTRICAL SPECIFICATIONS Resistance Range 0.3 Ω to 900 kΩ Tolerances (Standard) ± 1 % to ± 10 % 600 W at + 85 °C bottom case temperature RTH (j - c): 0.112 °C/W Power Rating and Thermal Resistance Temperature Coefficient - 55 °C/155 °C IEC 60115-1 Standard Limiting Element Voltage UL ENVIRONMENTAL SPECIFICATIONS Temperature Range Climatic Category www.vishay.com 64 - 55 °C to 155 °C 55/155/56 Dielectric Strength IEC 60115-1, 1 min, 10 mA max. R ≤ 1 U: ± 500 ppm/°C 1 U < R ≤ 10 U: ± 300 ppm/°C 10 U < R: ± 150 ppm/°C 5 kV 7 kVRMS or 12 kVRMS Insulation Resistance ≥ 104 MΩ Inductance ≤ 0.1 µH Critical Resistance 41.66 kΩ For technical questions, contact: [email protected] Document Number: 50053 Revision: 27-Oct-10 LPS 600 Power Resistor for Mounting onto a Heatsink Thick Film Technology Vishay Sfernice PERFORMANCE TESTS CONDITIONS REQUIREMENTS IEC 60115-1 2 x Pr/10 s Umax. ≤ UL = 5000 V ± (0.25 % + 0.05 Ω) IEC 60115-1/IEC 60068-2-14 Test Na 50 cycles - 55 °C to + 155 °C ± (0.5 % + 0.05 Ω) IEC 60115-1 1000 h (90/30) Pr at 85 °C ± (0.5 % + 0.05 Ω) IEC 60115-1 56 days RH 95 %/40 °C ± (0.5 % + 0.05 Ω) MIL STD 202 Method 204 Cond. D (10 g; 5/500 Hz) ± (0.25 % + 0.05 Ω) IEC 60115-1 (55/155/56) ± (1 % + 0.05 Ω) Momentary Overload Rapid Temperature Change Load Life Humidity (Steady State) Vibration Climatic Sequence 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) or a thermal film (type Q Pad II) easier and faster to install than the grease. • The fastening of the resistor to the heatsink is under pressure control of two screws tightened at 2 Nm for full power availability. LPS 300 Tightening Torque on Heatsink 2 Nm • The following accessories are supplied with each product: 2 screws CHC M4 x 25 class 8.8 and 2 M4 contact lock washers for heatsink mounting, 2 screws TH M4 x 6/6 and 2 M4 contact lock washers for connections. 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 155 °C. The dissipated power is simply calculated by the following ratio: ΔT P = ---------------------------------------------------------[ R TH (j - c) + R TH (c - a) ] P: ΔT: RTH (j - c): RTH (c - 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: (see specifications environmental paragraph). Thermal resistance value measured between outer side of the resistor and room temperature. It is the thermal resistance of the thermal interface, the heatsink (type, shape) and the quality of the fastening device. Example: RTH (c - a) for LPS 600 power dissipation 180 W at + 50 °C room temperature. ΔT ≤ 155 °C - 50 °C = 105 °C ΔT 105 RTH (j - c) + RTH (c - a) = ------- = ---------- = 0.58 °C/W P 180 RTH (j - c) = 0.112 °C/W RTH (c - a) = 0.58 °C/W - 0.112 °C/W = 0.468 °C/W Document Number: 50053 Revision: 27-Oct-10 For technical questions, contact: [email protected] www.vishay.com 65 LPS 600 Power Resistor for Mounting onto a Heatsink Thick Film Technology Vishay Sfernice OVERLOADS POWER RATING In any case the applied voltage must be lower than UL = 5000 V. Short time overload: 2 x Pr/10 s Accidental overload: The values indicated on the following graph are applicable to resistors in air or mounted onto a heatsink. The temperature of the case should be maintained within the limits specified in the following figure. To optimize the thermal conduction, contacting surfaces should be coated with silicone grease or thermal film, and heatsink mounting screws tightened to 2 Nm. ENERGY CURVE 10 000 RATED DISSIPATION IN % ENERGY IN J 1000 100 10 1 0.1 10-6 100 80 60 40 20 0 10-5 10-4 10-3 10-2 10-1 1 0 50 85 100 150 155 200 BOTTOM CASE TEMPERATURE IN °C OVERLOAD DURATION IN s MARKING PACKAGING Series, style, ohmic value (in Ω), tolerance (in %), manufacturing date, Vishay Sfernice trademark. Box of 15 units ORDERING INFORMATION LPS 600 100 kΩ ±1% xxx BO15 e MODEL STYLE RESISTANCE VALUE TOLERANCE CUSTOM DESIGN Optional on request: Special TCR, shape etc. PACKAGING LEAD (Pb)-FREE ±1% ±2% ±5% ± 10 % GLOBAL PART NUMBER INFORMATION L GLOBAL MODEL LPS 600 P S 0 6 0 0 H 4 7 R 0 J B DIELECTRIC OHMIC VALUE TOLERANCE PACKAGING SPECIAL L = Dielectric strength 7 kV H = Dielectric strength 12 kV The first three digits are significant figures and the last digit specifies the number of zeros to follow. R designates decimal point. F=1% G=2% J=5% K = 10 % B = Box 15 pieces As applicable ZAx 48R7 = 48.7 Ω 47R0 = 47 Ω 1001 = 1 kΩ 4R70 = 4.7 Ω R240 = 0.24 Ω www.vishay.com 66 For technical questions, contact: [email protected] Document Number: 50053 Revision: 27-Oct-10 Legal Disclaimer Notice 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. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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