Truohm knp series 3w wirewound resistors 5 truohm knp 300s 33r a 3r3 wirewound resistor wound on a ceramic former with flame retardant silicone resin coating that offers high resistance stability excellent heat dissipation and low noise truohm knp 300s 33r knp series 3r3 5 3w axial wirewound resistor