LPS 300 www.vishay.com Vishay Sfernice Power Resistor for Mounting onto a Heatsink Thick Film Technology FEATURES • 300 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 • Material categorization: For definitions of compliance please see www.vishay.com/doc?99912 DIMENSIONS in millimeters 25.8 ± 1 LPS 300 6K8 5 % V2 60 25.2 21.2 15.2 ± 0.5 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 STANDARD ELECTRICAL SPECIFICATIONS MODEL RESISTANCE RANGE Ω RATED POWER P85 °C W LIMITING ELEMENT VOLTAGE UL V TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C CRITICAL RESISTANCE (Ω) LPS 300 0.3 to 900K 300 5K 1, 2, 5, 10 150, 300, 500 83.33K MECHANICAL SPECIFICATIONS Mechanical Protection Resistive Element Substrate Insulated case UL 94 V-0 Thick film Alumina End Connections Screws M4 Tightening Torque Connections 2 Nm Tightening Torque Heatsink Maximum Torque Weight 2 Nm 2.5 Nm 83 g ± 10 % ENVIRONMENTAL SPECIFICATIONS Temperature Range Climatic Category Revision: 24-Oct-13 - 55 °C to 120 °C 55/120/56 TECHNICAL SPECIFICATIONS Power Rating and Thermal Resistance Temperature Coefficient - 55 °C/120 °C Standard IEC 60115-1 Dielectric Strength IEC 60115-1, 1 min, 10 mA max. Lightning test 1.2/50 μs IEC 61000-4-5 Insulation Resistance Inductance Partial Discharge (for LPS 300 D only) 300 W at + 85 °C bottom case temperature RTH (j - c): 0.112 °C/W R ≤ 1 Ω: ± 500 ppm/°C 1 Ω < R ≤ 10 Ω: ± 300 ppm/°C 10 Ω < R: ± 150 ppm/°C 7 kVRMS or 12 kVRMS Until 12 kV ≥ 104 MΩ ≤ 0.1 μH ≤ 100 pC/7 kV ≤ 10 pC/5 kV Other cases: Consult us Document Number: 50052 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 300 www.vishay.com Vishay Sfernice PERFORMANCE TESTS CONDITIONS REQUIREMENTS IEC 60115-1 4 x Pr/10 s Umax. ≤ UL = 5000 V ± (0.25 % + 0.05 Ω) IEC 60115-1/IEC 30068-2-14 Test Na 50 cycles - 55 °C to + 120 °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 (55/120/56) ± (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 Bluesil Past 340 from BlueStar Silicones) 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. 2 off CHC M4 x 16/16 class 8. 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 120 °C. The dissipated power is simply calculated by the following ratio: ΔT P = ------------------------------------------------------------------------------------------R TH (j - c) + R TH (c - h) + R TH (h - a) P: Expressed in W ΔT: 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 specifications environmental paragraph). 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 LPS 300 power dissipation 180 W at + 50 °C room temperature. ΔT ≤ 120 °C - 50 °C = 70 °C ΔT P 70 180 RTH (j - c) + RTH (c - h) + RTH (h - a) = ------- = -------- = 0.388 °C/W RTH (j - c) = 0.112 °C/W RTH (c - h) + RTH (h - a) = 0.388 °C/W - 0.112 °C/W = 0.276 °C/W Revision: 24-Oct-13 Document Number: 50052 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 300 www.vishay.com Vishay Sfernice OVERLOADS MARKING In any case the applied voltage must be lower than UL = 5000 V. Series, style, ohmic value (in Ω), tolerance (in %), manufacturing date, Vishay Sfernice trademark. Short time overload: 4 x Pr/10 s Accidental overload: The values indicated on the following graph are applicable to resistors in air or mounted onto a heatsink. ENERGY CURVE POWER RATING 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. 10 000 RATED DISSIPATION IN % ENERGY IN J 1000 100 10 1 0.1 0.0001 0.001 0.01 0.1 1 10 100 1000 OVERLOAD DURATION IN ms 100 80 60 40 20 0 0 50 85 100 120 150 200 BOTTOM CASE TEMPERATURE IN °C POWER CURVE 10 000 PACKAGING Box of 15 units POWER IN kW 1000 100 10 1 0.0001 0.001 0.01 0.1 1 10 100 1000 OVERLOAD DURATION IN ms Revision: 24-Oct-13 Document Number: 50052 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 300 www.vishay.com Vishay Sfernice ORDERING INFORMATION LPS 300 100 kΩ ±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. GLOBAL PART NUMBER INFORMATION L GLOBAL MODEL LPS 300 Revision: 24-Oct-13 P S 0 3 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 D = Partial discharge ≤ 100 pC/7 kV and ≤ 10 pC/5 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 Ω 47R0 = 47 Ω 1001 = 1 kΩ 4R70 = 4.7 Ω R240 = 0.24 Ω F=1% G=2% J=5% K = 10 % B = Box 15 pieces As applicable ZAx Document Number: 50052 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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We confirm that all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU. Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as Halogen-Free follow Halogen-Free requirements as per JEDEC JS709A standards. Please note that some Vishay documentation may still make reference to the IEC 61249-2-21 definition. We confirm that all the products identified as being compliant to IEC 61249-2-21 conform to JEDEC JS709A standards. Revision: 02-Oct-12 1 Document Number: 91000