STP80NF55-06FP — 55 V, 60 A N-channel STripFET II MOSFET in TO-220FP
The 55 V Vdss rating sets the maximum drain-to-source voltage the part can block; in practice you should derate to around 44 V for reliable switching in a hard-switched converter with 20% voltage margin. The 60 A continuous drain current is specified at a case temperature of 25°C — real-world current capability drops as the case heats up, and the 45 W maximum power dissipation (Tc) becomes the limiting factor in continuous operation. The 6.5 mOhm Rds(on) at 40 A, 10 V gate drive is a strong figure for this voltage and package class, keeping conduction losses under 1.6 W at 40 A. Gate charge is 189 nC at 10 V, which is moderate; the driver must be sized to deliver that charge without excessive switching losses at the target frequency.
For BOM lines that still specify this exact part, the available channel is independent distribution — new-old-stock and surplus inventory sourced from distributors' overstock, contract manufacturer excess, or qualified brokers.
Package and mounting — TO-220FP through-hole
The TO-220-3 Full Pack (TO-220FP) is a fully isolated through-hole package. The metal tab is electrically isolated from the die, so it can be bolted directly to a grounded heatsink or chassis without an insulating pad.