What the headline ratings mean for a board-level swap
The AUIRF2807 is an automotive-grade N-channel HEXFET rated for 75 V drain-source and 75 A continuous drain current. The 13 mOhm max Rds(on) at 43 A and 10 V gate drive means conduction losses stay under 0.6 W at that current — the part runs cool enough that the TO-220 tab alone handles the thermal load without forced air in most automotive under-hood environments. A 160 nC gate at 20 kHz draws 3.2 mA from the gate driver — well within the output capability of most automotive half-bridge drivers, but the driver's peak current still needs to charge the gate in the desired dead-time window.
Temperature grade and where it fits
The junction temperature range spans -55°C to 175°C. This is the full automotive-grade band — the part survives cold-crank at -40°C and still has margin at 150°C under-hood ambient. The 175°C absolute maximum junction temperature is the hard ceiling; the Rds(on) roughly doubles from 25°C to 150°C, so the conduction loss budget needs derating for sustained high-temperature operation. Below 10 V the Rds(on) rises sharply — a 5 V gate might see 2-3× the 13 mOhm figure.
No pin-compatible second-source or successor is listed on the official record.