The winding is so done so as to minimize inductive and capacitive effects at high frequencies beyond 200 khz.
Ceramic resistors advantages.
These precision wire wound resistors are available up to 5 w with and 1 tolerances and are useful upto 5 to 10 mhz.
Here are some advantages of a ceramic kilns it durable fire resistant moisture resistant resistant to abration slip resistance frost resistant stain resistant chemical resistant and color.
Ceramic s use however is not limited to the internal components of resistors.
The important characteristics of wirewound resistors is its precision.
Advantages very cheap and easy to replace.
The ceramic resistors offer the advantages of carbon composition resistors pure resistance stability reliability and pulse stability in power electronic applications though these too have poor tolerance levels typically 10.
Wirewound resistors have longer life compared to other types.
They can have very tight resistance tolerances say 0 005 is commonly achieved.
Since they fail open circuit a small low value resistor can be used instead of a more expensive fuse.
Precision wire wound resistors are wound on ceramic tubes and sometimes epoxy moulded tubes are used.
While an excellent electrical insulator ceramic is also an excellent heat conductor.
Sometimes referred to as ceramic power resistors due to their resistance levels ceramic resistors have definite advantages over other resistors.
Wirewound resistors are one of the first practical resistors used since from the beginning.