Specifications:

Internal 650V avalanche-rugged smart power VDMOSFET
interallY Start-up Circuit
se ontimizes with IS outout nonsisolated anolication
Semi enclosed steady output power 5.4 W @230VAC. DIP
Frequency modulation for low EMI
Excellent constant voltage regulation and High efficiency
Excellent Protection Coverage:
Adinstable Over Current Protection COOP
Over 'Temperature Profection (OTP)