PCB spacing of TO220 FET legs in offline Flyback SMPS PCB

[ocset]

As you know, it is illegal to have an offline 230VAC flyback SMPS which uses a   TO220 FET in the PCB without legs bent to get the clearance above 1.5mm from drain to source.

…But I have taken apart an offline  flyback SMPS, which is sold throughout the EU. It comprises a TO220 FET which is soldered into the PCB with legs not bent. There is just 1.09mm clearance (also creepage) between the bare metal of the drain and source pins  along the PCB. This is illegal.
It is sold by a huge European corporation,  throughout the EU,  though the SMPS was designed in China.
How is this allowed? The volume sales of these product are enormous.

[ocset]

Thanks, there is no con coat.
Also, this is a consmer product.

[Circlotron]

Post a picture.

[floobydust]

Ultimately it's the pin space on the package that is the limiting factor, so TO-220 and D2PAK same issue.
App note has good info: AN-4179.pdf

[ebastler]

Ultimately it's the pin space on the package that is the limiting factor, so TO-220 and D2PAK same issue.
App note has good info: AN-4179.pdf

Thanks for that reference. It is enlightening, although (or because?) I find it to be suprisingly hand-waving: "From various sources on the internet ... this can be defined as following."  "The entire industry sells optoisolators with 320 mil spacing..."  "This seems to agree with the industry rule of thumb..."

I had expected the manufacturers to consistently refer to ISO/EN standards, if only to cover their behinds. Apparently this is a less well-defined area than I had thought.

[floobydust]

It's the safety issue arising from having a creepage/clearance breakdown.

If the TO-220 and PCB do not meet regulatory spacings requirements, it is assumed to breakdown and short.
On a flyback converter, this just arcs and hopefully blows the mains fuse.
It does not endanger anyone as would an arc between hazardous live and ground/or the secondary, breakdown between the D-S pins.

[Mattylad]

As you know, it is illegal to have an offline 230VAC flyback SMPS which uses a   TO220 FET in the PCB without legs bent to get the clearance above 1.5mm from drain to source.

What law makes it illegal?
Very poor design practise maybe, but what law are you referring to that makes it illegal?