What rail voltage does this TVS protect?
It clamps transients to a maximum of 146V at a peak pulse current of 3.4A (10/1000µs waveform). The 500W peak pulse power rating gives a reasonable energy-handling margin for 90V rails in industrial or telecom equipment.
Package and mounting for reflow
The SMA footprint is standard for 500W TVS diodes; reflow profile follows typical lead-free solder curves for the package body.
Microchip lists the SMAJ90CAE3/TR13 as Active.
