RCEC 750

RCEC 750

RCEC 750

Product catalog summary
Overview: The document provides technical specifications for the RCEC 750 power resistors by Vishay MCB, utilizing thick film technology and designed for cooling with an auxiliary heatsink. It highlights features, specifications, and testing conditions.
Features: The resistors offer a high power-to-volume ratio, are non-inductive, and have M4 screw-on outputs with an option for M5. They are easy to assemble with self-calibrated pressure and comply with material categorization standards.
Electrical Specifications: The RCEC 750 model covers a resistance range from 0.15 to 1M ohms with a maximum rated power of 800W. Tolerances are available at ±10% and ±5%, with a temperature coefficient of ±700 ppm/°C for lower resistance values.
Mechanical Specifications: The resistors are made with a cermet resistive element, alumina substrate, and resin encapsulation. They comply with UL 94 V-0 flame classifications.
Technical Specifications: Operating temperature ranges from -55°C to +155°C, with a maximum operating voltage of 5000 VDC. Dielectric strength is 7000 V, and insulation resistance exceeds 100 GΩ at 1000 VDC.
Performance Tests: The resistors undergo various tests including damp heat, climatic sequence, rapid temperature changes, shock, and vibrations, maintaining performance within specified tolerances.
Cooling and Assembly: Cooling can be achieved through forced air or liquid circulation. The document provides guidelines for heatsink surface conditions and mounting recommendations.
Ordering Information: The document outlines the global part number system, specifying model, terminal, ohmic value, tolerance, and packaging options.
Disclaimer: Vishay disclaims liability for errors or inaccuracies in the document and emphasizes the customer's responsibility to validate product suitability for specific applications.
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Catalog excerpts

RCEC 750-1

VISUAL _ www.vishay.com Power Resistors Cooled by Auxiliary Heatsink (Not Supplied) Thick Film Technology FEATURES • System without external radiation • High power / volume ratio RoHS COMPLIANT • Non-inductive • M4 screw-on outputs (M5 on option) • Easy assembly, self-calibrated pressure (400 N) • Material categorization: for definitions of compliance please see www.vishav.com/doc?99912 DESIGN SUPPORT TOOLS AVAILABLE STANDARD ELECTRICAL SPECIFICATIONS Notes (1) ± 2 % or ± 1 % on special request for limited resistance value and with reduction of maximum power and pulse rating (contact us for details) (2) Current limitation for 0.15 Q: 30 ARMS max. (3) Other on request MECHANICAL SPECIFICATIONS TECHNICAL SPECIFICATIONS Revision: 05-Jul-2019 1 Document Number: 32509 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

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RCEC 750-2

www.vishay.com RCEC 750 Vishay MCB Revision: 05-Jul-2019 2 Document Number: 32509 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

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RCEC 750-3

Note (1) All tests were done in Vishay MCB laboratory conditions Temperature (°C) Permanent Applicable Power (W) as a Function of Bottom Case Temperature (°C) 1 10 100 1000 Time (s) Intermittent Overload (Exceptional Operation) Bottom Case Temperature +85 °C 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

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RCEC 750-4

M4 min. depth 10 Thermal compound see note below Tightening torque for mechanical fixation Tightening torque for electrical connections COOLING The temperature of the heatsink may be maintained at the specified values with: • Forced air ventilation or internal circulation of a liquid cooling • Heatsink contact surface: < Ra 6.3 μ • Evenness defect: 0.05 mm max. • Surface temperature gradient (isotherm): 20 °C max. • Thermal compound not supplied (resistance < 0.025 °C/W / 0.05 mm preconized) • Mounting recommendation: www.vishay.com/doc?32558 The user must select the thermal resistance of the...

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RCEC 750-5

www.vishay.com RCEC 750 Vishay MCB GLOBAL PART NUMBER INFORMATION 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

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RCEC 750-6

Legal Disclaimer Notice www.vishay.com 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...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.