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VNC Vitreous Wirewound Power Resistors

VNC Vitreous Wirewound Power Resistors

VNC Vitreous Wirewound Power Resistors

Product catalog summary
Overview: The document provides technical specifications for Vishay MCB's vitreous wirewound power resistors, highlighting their features, specifications, and performance characteristics.
Features: These resistors are noted for high dissipation, embedded collars, and insulated mounting. They comply with the NFC 93214 standard and have specific material categorizations for compliance.
Specifications: The resistors come in various models with different power ratings, resistance ranges, and tolerances. For example, the VNC 30 x 250 model has a power rating of 320W, a resistance range of 4.7 to 470K ohms, and a tolerance of ±5%.
Technical Specifications: The resistors have a typical temperature coefficient of 75 ppm/°C and an operating temperature range from -55°C to +450°C. They are constructed with a ceramic core, NiCr alloy winding, and vitreous enamel coating.
Performance: The document details performance under various conditions such as overloads, climatic conditions, damp heat, thermal shocks, and vibrations. For instance, under overload conditions, the resistors can handle 10 times the nominal power for 5 seconds with a typical deviation of 0.4%.
Options and Ordering: Custom designs and packaging options are available upon request. The document provides a detailed guide on ordering information, including model, style, resistance value, tolerance, and packaging.
Legal Disclaimer: Vishay disclaims liability for errors or inaccuracies in the document and emphasizes that product specifications are subject to change without notice. The suitability of products for specific applications must be validated by the customer.
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Catalog excerpts

VNC Vitreous Wirewound Power Resistors-1

Vitreous Wirewound Power Resistors FEATURES • High dissipation • Embedded collars RoHS COMPLIANT • Insulated mounting • Applicable standard: NFC 93214 • Material categorization: for definitions of compliance please see www.vishav.com/doc799912 Revision: 08-Aug-16 1 Document Number: 32504 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.vishav.com/doc791000

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VNC Vitreous Wirewound Power Resistors-2

GENERAL CHARACTERISTICS Revision: 08-Aug-16 2 Document Number: 32504 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.vis

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VNC Vitreous Wirewound Power Resistors-3

Note (1) The higher of either value. DISSIPATION Power PW as a Function of Surface Temperature P(W) = f (Temperature Surface) Derating in Power as a Function of Ambient Temperature Repetitive Operation Energy as a Function of Rn Pulse Duration < 100 ms E = f(R) Intermittent Overloads Exceptional Operation Initial Temperature < 70 °C k x Pn = f(t) Revision: 08-Aug-16 3 Document Number: 32504 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...

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VNC Vitreous Wirewound Power Resistors-4

OPTIONS (Consult us) - Other values than E12 series - Intermediate terminals RESISTANCE VALUE TOLERANCE CUSTOM DESIGN MODEL STYLE NON-INDUCTIVE WINDING Optional Other on request special value, tolerance, terminals, etc. 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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VNC Vitreous Wirewound Power Resistors-5

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.