[Amps] "N, " "TNC" and "BNC" connectors are rated at 500 Watts and work at 1, 000 Watts as log as the load is good..

[Fuqua, Bill L]

The cellular industry like them, as they generate less intermodulation
distortion than N, though the IMD generated by N is not significant
for amateur radio.

Dave

What property of N connectors generate IMD?