Op amps with either input grounded have a fixed input capacitance parameter, CI, and this device has a 82pF @ 10V maximal input capacitance.To operate this transistor, you will need a 60V drain to source voltage (Vdss).A device like this reduces its overall power consumption when it uses drive voltage (4V 10V).
SSM3J168F,LF Features
a 60V drain to source voltage (Vdss)
SSM3J168F,LF Applications
There are a lot of Toshiba Semiconductor and Storage SSM3J168F,LF applications of single MOSFETs transistors.
Synchronous Rectification for ATX 1 Server I Telecom PSU