STP6NK50Z - STF6NK50Z STD6NK50Z N-CHANNEL 500V - 0.93Ω - 5.6A TO-220/TO-220FP/DPAK Zener-Protected SuperMESH™ MOSFET is a high performance MOSFET device from ST, with a typical RDS(on) of 0.93Ω. It is ideal for high current, high speed switching applications such as offline power supplies, adaptors and PFC.