The STFI260N6F6: Its headline figure is the 3 mOhm max Rds(on) at 60 A with 10 V gate drive — that single-digit milliohm number keeps conduction losses under a watt even at 20 A RMS, which matters when you are sizing the heatsink or the PCB copper area. The 80 A continuous drain rating at 25°C case temperature gives you headroom for peak loads, but the 41.7 W power dissipation ceiling (Tc) is the real thermal limit: at 80 A you would hit that limit before the silicon current rating, so derate aggressively.
Obsolete — last-time-buy and sourcing reality
The STFI260N6F6 is therefore available only through independent distribution channels — surplus stock, overstock, or last-time-buy inventory already in the pipeline. If your design can tolerate a different package or a surface-mount device, a parametric alternative from the same 60 V DeepGATE family may be a better long-term fit, but no pin-compatible drop-in replacement is documented.
Package and thermal — I2PAKFP through-hole
TO-262 full-pack (I2PAKFP, supplier device package I2PAKFP (TO-281)) — through-hole with encapsulated tab. 41.7 W power dissipation rating reflects higher thermal resistance.