Key ratings for a field-swap or design-in
Gate charge is 29 nC at 10 V, which means a standard gate driver can switch it without excessive drive current. That saves assembly time in a repair or retrofit.
What to swap it with
No official successor is listed for this obsolete part. For a drop-in replacement, look for an N-channel MOSFET in TO-3PF with 600 V Vdss, 18 A or higher current rating, and similar Rds(on) and gate charge. The MDmesh™ II Plus family has newer generations (MDmesh™ M5, M6) that offer lower Rds(on) per die size — but verify the package and pinout match your layout. If you are sourcing for a repair, an equivalent from another manufacturer (like Infineon's CoolMOS or IXYS) may fit, but check the gate threshold voltage and capacitance curves against the original design.