The STP80NF55-06 is an STMicroelectronics STripFET™ II N-channel power MOSFET in a through-hole TO-220-3 package. It is designed for switching applications in motor drives, DC-DC converters, battery management, and power supply output stages where 55 V drain-source voltage (Vdss) and 80 A continuous drain current (Id at 25°C case) provide the headroom for 12 V, 24 V, and 48 V rails with derating margin. At lower gate voltages the Rds(on) climbs; the datasheet specifies a 10 V drive voltage for the rated Rds(on), so a logic-level gate drive at 5 V will not hit this spec. Gate charge is 189 nC at 10 V, which sets the switching energy per cycle and the average gate-drive current required. A driver that can source and sink this charge quickly is needed to keep switching losses in check at higher frequencies.
Gate drive and switching — the 10 V drive requirement
The maximum Rds(on) is specified with Vgs at 10 V. If your gate driver supplies only 5 V, expect the on-resistance to roughly double, increasing conduction loss. Input capacitance (Ciss) is 4400 pF at 25 V Vds. This is moderate — a typical MCU GPIO cannot drive it directly; a dedicated MOSFET driver or a totem-pole stage is necessary for fast switching.
Package and thermal management — TO-220 in production
The supplier device package is TO-220. For pick-and-place, the through-hole package is hand-soldered or wave-soldered; no reflow profile applies.