The FSP Aurum Gold 500 would be compatible, yes. However, it is a slightly lower-quality model (compared with other FSP models and other brands). It's not a "bad" PSU, just a mediocre one, and since it seems you have limited choices of PSUs to choose from in your location, it would be sufficient for your needs (though, not a highly recommended model).
If you want better quality models of the brands available in your location, you might want to check these models (and its prices/availability):
FSP Hydro X HGX450 (450W), Non-modular, 5-year warranty (OEM: FSP)
FSP Hydro X HGX550 (550W), Non-modular, 5-year warranty (OEM: FSP)
Thermaltake Tough Power Gold TPD-0550M, Semi-Modular, 7-year warranty (OEM: CWT)
Thermaltake Tough Power DPS Gold TPG-0450D-G (450W), Fully Modular, 7-year warranty (OEM: CWT)
Thermaltake Tough Power DPS Gold TPG-0550D-G (550W), Fully Modular, 7-year warranty (OEM: CWT)
Cooler Master V550 RS-550-AFBA-G1 (550W), Fully Modular, 5-year warranty (OEM: Enhance Electronics)
Cooler Master V450 Semi-Modular RS-450-AMAA-G1 (450W), Semi-Modular, 5-year warranty (OEM: Enhance)
Cooler Master V550 Semi-Modular RS-550-AMAA-G1 (550W), Semi-Modular, 5-year warranty (OEM: Enhance)
If the above PSU models cost way above your budget or are not available, then the FSP Aurum Gold 500 would still be a better alternative to the Thermaltake Smart SE 730W you originally selected.