hAP powered from 802.3af port - possible?

Hi,

can I power a hAP using a 802.3af switch port (Cisco SG300-10p)?

Thanks!

No.

Thanks!

You should check the datasheet so it mentions 802.3af/at.
When it only says PoE it is not compatbile with 802.3af/at (in case of MikroTik and other lowcost devices).
802.3af/at capability is only available on newer devices like cAP AC.

You could use converters like these from Ubiquiti:
https://www.ui.com/accessories/instant-8023af-adapters/