LPS 1100 www.vishay.com Vishay Sfernice Power Resistor for Mounting onto a Heatsink Thick Film Technology FEATURES • LPS high power: 1100 W • Wide resistance range: 1 to 1.3 k E24 series • Non inductive • Easy mounting • Low thermal radiation of the case • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 DIMENSIONS in millimeters 25.8 ± 1 LPS 1100 I5U 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 Notes • Tolerances unless stated: ± 0.2 mm • Power dissipation is 1100 W by using a water cooled heatsink at Twater = 15 °C of Rth = 0.059 °C/W (25 °C to the nearest point of the resistor onto heatsink) and Rth contact estimated at 0.07 °C/W. STANDARD ELECTRICAL SPECIFICATIONS MODEL RESISTANCE RANGE RATED POWER P25 °C W TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C 1 to 1.3K 1100 1, 2, 5, 10 150 LPS 1100 MECHANICAL SPECIFICATIONS Mechanical Protection TECHNICAL SPECIFICATIONS Insulated case and resin for potting UL 94 V-0 Resistive Element Thick film End Connections Screws M4 Tightening Torque Connections Tightening Torque Heatsink Maximum Torque Weight 2 Nm 2 Nm 2.5 Nm 79 g ± 10 % ENVIRONMENTAL SPECIFICATIONS Temperature Range Climatic Category Revision: 05-Sep-12 - 55 °C to + 200 °C Power Rating and Thermal Resistance Temperature Coefficient (- 55 °C to + 200 °C), IEC 60115-1 Dielectric Strength IEC 60115-1, 1 min, 10 mA max. 1100 W at + 25 °C On heatsink Rth(j-c): 0.039 °C/W ± 150 ppm/°C 7 kVRMS or 12 kVRMS Insulation 104 M Inductance 0.1 μH 55/200/56 Document Number: 50059 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 LPS 1100 www.vishay.com Vishay Sfernice PERFORMANCE TESTS Momentary Overload CONDITIONS REQUIREMENTS IEC 60115-1: 2 x Pr/10 s for heatsink with Rth(h-a) 0.26 °C/W (maximum power: 700 W) 1.6 x Pr/1 s for heatsink with 0.26 °C/W >Rth(h-a) 0.059 °C/W (maximum power: 1800 W) ± (0.25 % + 0.05 ) AEC-Q200 conditions: IEC 60115-1/IEC 60068-2-14, Test Na 50 cycles (- 55 °C to + 200 °C) ± (0.5 % + 0.05 ) for all the ohmic values 1000 cycles (- 55 °C to + 200 °C) ± (5 % + 0.05 ) for R < 38 U ± (0.5 % + 0.05 ) for R 38 U AEC-Q200 conditions: IEC 60115-1 2000 h (90/30) Pr ± (5 % + 0.05 ) for R < 38 U ± (0.5 % + 0.05 ) for R 38 U Rapid Temperature Change Load Life AEC-Q200 conditions: IEC 60115-1, 1000 h RH 85 %/85 °C ± (0.5 % + 0.05 ) Mechanical Shock AEC-Q200 conditions: MIL-STD-202 method 213 condition D (100 g’s/6 ms 3.75 m/s) ± (1 % + 0.05 ) Vibration AEC-Q200 conditions: MIL-STD-202 method 204 condition D (5 g, 20 min 10/2000 Hz) ± (1 % + 0.05 ) AEC-Q200 conditions: IEC 60115-1 (55/200/56) ± (1 % + 0.05 ) Humidity (Steady State) 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 (ceramic, heatsink) should be coated with a silicone grease (type SI 340 from Blue Star Silicones). Thermal film (type Q-pad II from Berquist) is also possible, easier and faster to install than grease but with a lower efficiency for the power dissipation. • The fastening of the resistor to the heatsink is under pressure control of two screws tightened at 2 Nm for full power availability. LPS 1100 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. 2 off CHC M4 x 16/16 class 8 CHOICE OF THE HEATSINK AND THE THERMAL INTERFACE The user must choose the heatsink according to the working conditions of the component (power, room temperature). Maximum working temperature must not exceed 200 °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 or fluid cooling 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: 0.039 °C/W. 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 LPS 1100 power dissipation 850 W at + 18 °C fluid temperature. T 200 °C - 18 °C = 182 °C T 182 R th (j - c) + R TH (c - h) + R TH (h - a) = ------- = ---------- = 0.214 °C/W P 850 R th (j - c) = 0.039 °C/W R th (c - h) + R th (h - a) = 0.214 °C/W - 0.039 °C/W = 0.175 °C/W Revision: 05-Sep-12 Document Number: 50059 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 LPS 1100 www.vishay.com Vishay Sfernice CONFIG. 4: CONFIG. 3: CONFIG. 2: CONFIG. 1: AIR COOLING WATER COOLING AIR COOLING WATER COOLING HEATSINK P207/250 AND HEATSINK CP15 AND HEATSINK P207/250 AND HEATSINK CP15 AND THERMAL GREASE SI340 THERMAL GREASE SI340 THERMAL PAD Q-PAD II THERMAL PAD Q-PAD II Power Dissipation (W) 1100 350 650 285 T° Resistive Element (°C) 200 200 200 200 Rth(j-c) max. (°C/W) 0.039 0.039 0.039 0.039 Rth(c-h) typ. (°C/W) 0.070 0.201 0.187 0.315 Rth(h-a) max. (°C/W) Fluid T° (°C) 0.059 0.260 0.059 0.260 15 (water) 25 (air) 15 (water) 25 (air) Note • Configuration 1: Water cooling heatsink (CP15 from Lytron (304 mm x 95.3 mm x 8 mm) with water flow rate 4LPM and thermal grease Si340 from BlueStar Silicones Configuration 2: Air cooling heatsink P207/250 from Semikron (250 mm x 200 mm x 72 mm) and thermal grease Si340 from BlueStar Silicones Configuration 3: Water cooling heatsink (CP15 from Lytron (304 mm x 95.3 mm x 8 mm) with water flow rate 4LPM and thermal pad Q-pad II from Berquist Configuration 4: Air cooling heatsink P207/250 from Semikron (250 mm x 200 mm x 72 mm) and thermal pad Q-pad II from Berquist OVERLOAD POWER RATING In any case the applied voltage must be lower than UI = 6600 V. Short time overload: 2 x Pr/10 s for heatsink with Rth(h-a) 0.26 °C/W (maximum power: 700 W) and 1.6 x Pr/1 s for heatsink with 0.26 °C/W > Rth(h-a) 0.059 °C/W (maximum power: 1800 W). 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 limit 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. RATED POWER IN % 100 ENERGY CURVE 10 000 ENERGY IN J 1000 100 80 60 40 20 10 0 1 0 25 50 75 100 125 150 175 200 HEATSINK TEMPERATURE IN °C 0.1 0.01 10-7 10-6 10-5 10-4 10-3 10-2 10-1 PACKAGING 1 Box of 15 units OVERLOAD DURATION IN s MARKING Series, style, ohmic value (in ), tolerance (in %), manufacturing date, Vishay Sfernice trademark. ORDERING INFORMATION LPS 1100 1 k ±1% xxx BO15 e MODEL STYLE RESISTANCE VALUE TOLERANCE CUSTOM DESIGN PACKAGING LEAD (Pb)-FREE ±1% ±2% ±5% ± 10 % Optional on request: special TCR, shape, etc. Revision: 05-Sep-12 Document Number: 50059 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 LPS 1100 www.vishay.com Vishay Sfernice GLOBAL PART NUMBER INFORMATION L GLOBAL MODEL LPS 1100 Revision: 05-Sep-12 P S 1 1 0 0 H 4 7 R 0 J B DIELECTRIC OHMIC VALUE TOLERANCE PACKAGING SPECIAL L = Dielectric strengh 7 kV H = Dielectric strengh 12 kV 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 47R0 = 47 1001 = 1 k 4R70 = 4.7 R240 = 0.24 F=1% G=2% J=5% K = 10 % B = Box 15 pieces N = Box 15 pieces n/a As applicable ZAx Document Number: 50059 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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