KNP Flame-Proof Type Wirewound Resistors YAGEO KNP Flame-Proof Type Wirewound Resistors feature a power rating range of 1/4W to 7W and a resistance tolerance range of ±1% to ±5%. The resistor element is a resistive wire which is wound in a single layer on a ceramic rod, with tinned connecting wires of electrolytic copper welded to the end-caps. The ends of the resistive wire and the leads are connected to the caps by welding. YAGEO KNP Series Flame-Proof Type Wirewound Resistors are coated with layers of green color flame-proof lacquer.