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ElectroComponent Science and Technology
Volume 7, Issue 1-3, Pages 131-135

A Rating Criterion for Film Resistors

University of Edinburgh, Princess Margaret Rose Hospital, Fairmilehead, Scotland, Edinburgh, UK

Received 13 February 1980

Copyright © 1980 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


After experimental work has been carried out to determine the required constants, the resistor film temperature may be calculated from its dimensions and power dissipation using an expression which takes account of, and makes a reasonably good approximation for, the heat dissipated by lateral conduction. The arithmetic is simple and well suited to rapid processing using a programmed electronic calculator.