BUY MA8920 https://www.utsource.net/itm/p/1408402.html

Description: The MA8920 is a ZIP-7, SANKEN, NPN, high-voltage, high-speed switching transistor. Features: High voltage: VCEO = 600 V High speed: tF = 0.5 μs (typ.) Low saturation voltage: VCE(sat) = 1.5 V (typ.) High current gain: hFE = 100 (min.) High reliability: MTTF = 2.5 × 106 hours (min.) Applications: Switching power supplies DC-DC converters Motor control Lighting control (For reference only)