250 V, 14 A N-channel — TO-220 Full Pack isolation
The STF16NF25: It comes in the TO-220 Full Pack (TO-220FP) — the plastic body fully isolates the metal tab, so no insulating washer or pad is needed between the device and the heatsink. That saves a BOM line and a manual assembly step, and it eliminates the thermal resistance of the interface pad.
235 mOhm Rds(on) and 18 nC gate charge — conduction and switching budget
At 14 A the Rds(on) will be higher — the datasheet curve shows the normalised increase with current and junction temperature — so the designer should budget around 300 mOhm hot for the worst-case conduction loss. Input capacitance is 680 pF at 25 V drain-source. That is a moderate figure — the gate-drive rise time will be a few tens of nanoseconds with a typical driver, so the part is well suited for hard-switched topologies like flyback converters, PFC boost stages, and two-switch forward converters in the 50–150 kHz range.
For a production BOM this means no urgent obsolescence risk — the part can be qualified into a new design with confidence that the supply channel will remain open for the foreseeable future.