Moisture Sensitivity Level

[UStol.1]

I’m a bit confused by the conflicting information regarding the STM part VN21-E.

There is no MSL specified on the STM label – which makes sense given that it is a Pentwatt package (through-hole mounting = wave soldering = no real risk of MSL damage).

However, STMs official partner DigiKey (and others) specify an MSL 3.

That can’t actually be right, can it?

[Peter BENSCH]

The VN21 was a High Side Smart Power SSR, which has already been discontinued, so no information is available from ST anymore. I can only assume that Digikey entered some MSL value, as this was indeed not usual for this package variant.

Hope that answers your question?

Regards
/Peter