ITWissen.info - Tech know how online

power resistor

Power resistors are resistors that can dissipate higher power. They can be designed as wire-wound

resistors

or thick-film resist

ors

.

There are no specific power values above which a resistor is to be classified as a power res istor.The classification is purely subjective and depends on the application. In electronics, resistors with 0.5 W are already classified as power resistors, whereas in power engineering values of 50 W are specified.

Thick-film power resistor for 100 W, photo: Eldis

Thick-film power resistor for 100 W, photo: Eldis

To dissipate the absorbed power, power resistors are equipped with heat sinks or heat dissipationplates or are housed in aluminium cases and are mounted directly on a heat-conducting surface for better heatdissipation. Power resistors are used as heating resistors, discharge resistors or as protective resistors for current and voltage limitation.

Informationen zum Artikel
Englisch: power resistor
Updated at: 19.02.2014
#Words: 157
Links:
Translations: DE