50 ns reverse recovery — where it buys you switching margin
The ES2G-E3/52T: The ES2G-/52T is a Vishay general-purpose fast recovery diode rated for 400 V reverse voltage and 2 A average rectified current, with a reverse recovery time of 50 ns.
400 V / 2 A — thermal and electrical sizing
Forward voltage is 1.1 V maximum at 2 A.
Active status — no LTB clock ticking
Vishay lists the ES2G-/52T as Active with ROHS3 compliance.
Package and mounting — SMB footprint check
The SMB footprint is smaller than SMC but larger than SMA; verify the PCB land pattern matches the SMB outline before committing the layout. The 15 pF capacitance at 4 V is low enough that it does not limit switching edge rates in most power circuits.