The BUL1203E is manufactured using diffused collector in planar technology to enhance switching speeds and tight hFE range while maintaining a wide RBSOA. Thanks to his enhanced high voltage structure 1 (EHVS1) it has an intrinsic ruggedness which enables the transistor to withstand a high collector current level during breakdown condition, without using the transil protection usually necessary in typical converters for lamp ballast. https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2021-04-22 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2021-05-18 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2021-12-06 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2022-04-09 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2022-06-10 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2022-06-23 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2024-01-13 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2024-07-08 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2025-07-10 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2026-05-02 https://elecena.pl/product/17817428/bul1203e-high-voltage-fast-switching-npn-power-transistor 2026-05-30