The STP80NF70 is a 68 V, 98 A N-channel power MOSFET from ST's STripFET™ II generation, packaged in a through-hole TO-220-3. This is a device that was designed for medium-voltage switching applications where on-resistance and current handling matter more than switching speed. The 75 nC gate charge and 2550 pF input capacitance are moderate — a 10 V gate drive rail is mandatory to achieve the rated Rds(on); driving it from a 5 V logic-level output will leave the channel partially enhanced and dissipation will climb.
NRND — plan your supply line
This is not an immediate discontinuation, but the part is on a path toward end-of-life. New designs should select a pin-compatible replacement; existing production lines should qualify a second source or stock a last-time-buy quantity. The TO-220 package is common across many ST MOSFETs in the 60-75 V range, so a drop-in alternate with similar Rds(on) and gate charge is achievable.