Gate charge and drive voltage flexibility
The STP200N3LL: The gate charge is 53 nC maximum at 4.5 V. Drive voltages of 4.5 V and 10 V are specified.
175 °C junction — thermal headroom for high-ambient designs
The 176.5 W maximum power dissipation at the case is a theoretical ceiling — real-world dissipation is limited by the heatsink and the 175 °C junction limit.
Package and marking verification
The base product number is STP200. For a counterfeit-detection screen, the laser etch on the top of the TO-220 body should read STP200N3LL with a consistent font and pitch matching ST's factory marking for the production week on the date code.