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Principles of Analog Electronics
book

Principles of Analog Electronics

by Giovanni Saggio
January 2014
Intermediate to advanced content levelIntermediate to advanced
567 pages
23h 13m
English
CRC Press
Content preview from Principles of Analog Electronics
Two-Terminal Components
103
4.4.4 Power Resistors
When choosing a resistor, it is wrong to consider only its “ohmic” value. The maxi-
mum power that it can dissipate without damage must also be considered. For the
standard resistors, typical power values that can be dissipated are 1/8 W, 1/4 W,
and 1/2 W.
This is generally dened as nominal power—the value of power that the resistor
can dissipate, when at room temperature of 25°C, without permanently altering its
structure. A power resistor is able to dissipate nominal powers equal to 1 W, 2 W
and more. Commonly, it has a parallelpiped shape (rather than cylindrical) and a
ceramic body. The resist ...
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Publisher Resources

ISBN: 9781466582026