10-10-2017, 08:14 AM
No, it is not the way a resistor is used, with the exception of special "fusible" resistors.
And, most of the time, if the resistor starts heating unreasonably, this means some other components have already been damaged in the first place to make it overheat.
The wattage rating is not there to melt at certain point, but to provide a compromise between the space needed and acceptable heating. It is always better to have a resistor that heats less, meaning higher power rating, but then one might not have enough space to accommodate it, so a compromise is reached between "this heat should not damage this resistor and things around it" and "this resistor needs this much space" by using a resistor of 2W rating, which is sufficient instead of 1W, which would not be sufficient (damage to resistor or nearby components) or 5W, which is acceptable but too big.
And, most of the time, if the resistor starts heating unreasonably, this means some other components have already been damaged in the first place to make it overheat.
The wattage rating is not there to melt at certain point, but to provide a compromise between the space needed and acceptable heating. It is always better to have a resistor that heats less, meaning higher power rating, but then one might not have enough space to accommodate it, so a compromise is reached between "this heat should not damage this resistor and things around it" and "this resistor needs this much space" by using a resistor of 2W rating, which is sufficient instead of 1W, which would not be sufficient (damage to resistor or nearby components) or 5W, which is acceptable but too big.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
