BUY HE1A4A https://www.utsource.net/itm/p/8936547.html
HE1A4A Bias Resistor NPN 60V 2A R2=10KΩ sot89 MARKING GA
Package: SOT-89 Manufacturer: NEC Description: HE1A4A is a 4-pin SOT-89 package device manufactured by NEC. Features: Low on-resistance Low power consumption High speed switching High reliability Applications: DC-DC converters Motor drivers Power supply circuits Switching regulators Battery charging circuits (For reference only)