The 15 nC total gate charge at 10 V keeps switching losses low in hard-switched topologies; a typical gate driver delivering 1 A can charge the gate in about 15 ns.
Thermal and package reality — the SOT223 is the bottleneck
The PG-SOT223 surface-mount package limits maximum power dissipation to 7 W at case temperature. With Rds(on) rising about 50% at 125°C junction, the practical continuous current at elevated ambient is well below the 6 A rating. For a 48 V to 12 V flyback converter at 50 W, the MOSFET sees peak drain current around 1.5 A — well within the SOA, and the 478 pF input capacitance at 400 V Vds means the driver sees a light capacitive load.
Parametric contrast with a 500 V CoolMOS CE sibling
The IPN95R1K2P7ATMA1 offers 950 V Vdss versus 500 V, a higher 6 A continuous drain versus 4.3 A, and a slightly higher 1.2 Ohm Rds(on) versus 950 mOhm. Gate charge is 15 nC versus 10.5 nC. The key difference is voltage class: the 950 V part is for universal-input flybacks and PFC stages where the 500 V part would exceed its drain-source breakdown. Package and footprint differ — the IPN95R1K2P7ATMA1 is in PG-SOT223, while the IPD50R950CEAUMA1 uses a DPAK (TO-252). They are not pin-compatible.