RPH 100 www.vishay.com Vishay Sfernice Power Resistor for Mounting onto a Heatsink Thick Film Technology FEATURES • • • • • • • High power rating Low thermal radiation of the case Wide ohmic value range Easy mounting High overload capabilities Reduced size and weight Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 This new style has been developed as an extension to RCH range. Through the use of thick film technology, a non-inductive solution for power resistors is available which are rated up to 100 W at +25 °C. The terminations position prevents any risk of an electrical arc to the heatsink. This resistor series can replace and offer advantages to standard wirewound devices. DIMENSIONS in millimeters V Connections 42.4 ± 0.5 4 16.6 18.5 ± 0.4 21.15 ± 0.7 65.2 ± 0.4 35 Ø 4.2 25.6 ± 0.4 37 46.7 Ø 4.2 Note • Tolerances unless stated: ± 0.2 mm. STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE RESISTANCE RANGE RATED POWER P25 °C W LIMITING ELEMENT VOLTAGE UL V TOLERANCE ±% TEMPERATURE COEFFICIENT ± ppm/°C RPH 100 100 0.092 to 1M (1) 100 1900 1, 2, 5, 10 150 Note (1) E24 series. MECHANICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Mechanical Protection Resistive Element Power Rating Substrate End Connections Tightening Torque Connections Tightening Torque Heatsink Weight Insulated case UL 94 V-0 Cermet Alumina on metallic base of nickel coated aluminum V connections: Screws M4 x 6 1 Nm 3 Nm 60 g ± 10 % Continuous Momentary Temperature Standard Coefficient Thermal Resistance Dielectric Strength MIL STD 202 Insulation Resistance Inductance 100 W at 25 °C chassis mounted 0.45 °C/W 10 W at 25 °C free air ± 300 ppm/°C < 1 ± 150 ppm/°C > 1 0.55 °C/W 5 kVRMS, 1 min, 10 mA max. 106 M 0.1 μH ENVIRONMENTAL SPECIFICATIONS Thermal Resistance Temperature Range Climatic Category Revision: 04-Mar-16 Rth (j - c) 0.55 °C/W -55 °C to +125 °C 55 / 125 / 56 Document Number: 50046 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 RPH 100 www.vishay.com Vishay Sfernice PERFORMANCE TESTS CONDITIONS REQUIREMENTS NF EN 140 000 CEI 115_1 4 Pr / 5 s US < 2 UL < ± (0.25 % + 0.05 ) NF EN 140000 CEI 68214 Test Na 5 cycles, -55 °C, +125 °C < ± (0.25 % + 0.05 ) NF EN 140 000 Pr at 25 °C, 1000 h < ± (0.5 % + 0.05 ) MIL STD 202 Method 103 B Test D 56 days, 95 % RH < ± (0.5 % + 0.05 ) Short Time Overload Rapid Temperature Change Load Life (Chassis Mounted 0.45 °C/W) Humidity (Steady State) RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR Ohmic Value <1 >1 Standard Tolerance ±5% ±5% Standard TCR ± 300 ppm/°C Tolerance On Request ± 150 ppm/°C ± 1 % to ± 2 % 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). • The fastening of the resistor to the heatsink is under pressure control of two screws (not supplied). RPH 100 Tightening Torque on Heatsink 3 Nm • In order to improve the dissipation, either forced-air cooling or liquid cooling may be used. • Do not forget to respect an insulation value between two resistors (dielectric strength in dry air 1 kV/mm). 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: 0.55 °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 - a) for RPH 100 power rating 80 W at ambient temperature +40 °C. T 125 °C - 40 °C 85 °C T ----- = 1.06 °C/W RTH (j - c) + RTH (c - h) + RTH (h - a) = ------- = 85 P 80 RTH (c - h) + RTH (h - a) 1.06°C/W - 0.55 °C/W 0.51 °C/W Revision: 04-Mar-16 Document Number: 50046 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 RPH 100 www.vishay.com Vishay Sfernice OVERLOADS POWER RATING In any case the applied voltage must be lower than 2 Un. Umax. < 2 Un < 3800 V. For resistor mounted onto a heatsink with thermal resistance of 0.45 °C/W. Accidental overload: The values indicated on the following graph are applicable to resistors in air or mounted onto a heatsink. MARKING Series, style, ohmic value (in ), tolerance (in %), manufacturing date, Vishay Sfernice trademark. RATED POWER IN % 100 Short time overload: 4 x Pr/5 s 80 60 40 20 ENERGY CURVE 1000 0 ENERGY IN JOULES 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE IN °C 100 10 1 0.1 10-7 10-6 10-5 10-4 10-3 10-2 10-1 OVERLOAD DURATION IN s POWER CURVE 10 000 000 POWER IN W 1 000 000 100 000 10 000 1000 100 10-7 10-6 10-5 10-4 10-3 10-2 10-1 OVERLOAD DURATION IN s Revision: 04-Mar-16 Document Number: 50046 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 RPH 100 www.vishay.com Vishay Sfernice ORDERING INFORMATION RPH 100 3.3 k ±5% V xxx MODEL STYLE RESISTANCE VALUE TOLERANCE CONNECTIONS ±1% ±2% ±5% V: M4 screw CUSTOM DESIGN optional on request: special TCR, shape etc. GLOBAL PART NUMBER INFORMATION R P H 1 0 0 V 1 0 0 0 0 J B GLOBAL MODEL SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING SPECIAL RPH 100 V = M4 screw 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 k R0100 = 0.01 R6800 = 0.68 27000 = 2700 = 2.7 k F=1% G=2% J=5% K = 10 % B = Box 5 pieces As applicable Ex = XXX RELATED DOCUMENTS APPLICATION NOTES Pulse Capabilities for Thick Film Power Resistors www.vishay.com/doc?50060 Guidelines for Vishay Sfernice Resistive and Inductive Components www.vishay.com/doc?52029 Revision: 04-Mar-16 Document Number: 50046 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. 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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