BUY 2SK2139 https://www.utsource.net/itm/p/1146941.html
DC-DC Converter, 1Watt, Input VDC: 12, Output VDC: 3.3, MaxOutput CurrentA: 0.3, Package: SIP4, IsolationVDC: 1000, Operating Temp. -40??C to +85??C, Low Ripple & Noise, High Efficiency up to 80%, Low Profile Plastic Case, Single Output
Description: 2SK2139 is a N-channel MOSFET manufactured by NEC. Features: Low on-resistance Low gate charge High speed switching High voltage rating High avalanche energy Applications: DC-DC converters Motor control Switching power supplies High voltage switching (For reference only)