950 V N-channel MOSFET for high-voltage power stages
The STP20N95K5 is an N-channel MOSFET from STMicroelectronics' SuperMESH5™ series, rated for a drain-to-source voltage of 950 V and continuous drain current of 17.5 A at 25°C case temperature.
On-resistance and gate charge — conduction and switching trade-offs
This Rds(on) at the 9 A test point is the figure to use for conduction loss calculations at full load; the 17.5 A continuous rating is a package-limited maximum, not a recommended operating point for low-loss conduction. Total gate charge is 40 nC at 10 V Vgs, which keeps switching losses manageable in hard-switched topologies at frequencies up to 100 kHz.
Temperature range and package — mounting and environment
The TO-220-3 package with through-hole mounting allows heatsink attachment via the metal tab; maximum power dissipation is 250 W at case temperature, derated above 25°C per the datasheet curve.