Category: Bi-polar Transistor (BJT)

Introduction The BD240 is a PNP epitaxial-base power transistor designed for medium power linear amplification and switching roles. It is commonly used in circuits where the PNP polarity is needed (for example, in the “upper” side of push-pull amplifier designs or as a high-side switch). Packaged in the TO-220 plastic package, it offers a robust […]

Introduction The BD239 is a silicon epitaxial-base NPN power transistor, commonly used in general-purpose switching and linear amplifier circuits. It’s known for its robustness in power applications and its capacity to handle moderate current and voltage stresses, making it suitable for hobbyist and industrial designs alike. The transistor is packaged in TO-220 plastic form, giving […]

Introduction The BD238 is a PNP silicon epitaxial-base power transistor designed for medium-power linear amplification and switching applications. Its PNP polarity makes it suited for circuits needing negative-side conduction or for use in complementary amplifier stages. It is packaged in a TO-126 / SOT-32 plastic package, providing a compact footprint while still supporting moderate thermal […]

Introduction The BD236 is a medium-power PNP silicon transistor designed for both linear amplification and switching applications in electronic circuits. It belongs to the BD23x PNP family (BD234, BD236, BD238) and is often used in complementary pairs with NPN counterparts (like BD235). The BD236 is built to handle moderate currents and voltages, making it useful […]

Introduction The BD234 is a silicon PNP epitaxial-base power transistor intended for medium power linear amplification and switching applications. It is packaged in the JEDEC SOT-32 (TO-126) plastic package, which provides a balance between compact dimensions and thermal dissipation for low to moderate power levels. Because it is a PNP transistor, BD234 is used in […]

Introduction The BD237 is a medium-power NPN silicon transistor designed for use in linear amplification, switching, and audio driver circuits. It belongs to the BD23x series (BD233, BD235, BD237), but with a higher voltage rating to support more demanding applications. Packaged in the TO-126 (SOT-32 / JEDEC SOT-32) form factor, BD237 offers compact mounting and […]

Introduction The BD233 is a medium-power NPN silicon transistor designed for linear and switching applications. It is often used in audio amplifier stages, driver circuits, and general purpose power switching tasks thanks to its balance of moderate voltage and current handling. The BD233 is designed in a TO-126 plastic package, which offers compactness and reasonable […]

Introduction The BD235 is a medium-power NPN silicon epitaxial-base transistor tailored for both linear amplification and switching applications. It belongs to the BD23x transistor family (BD233, BD235, BD237) and is packaged in the TO-126 (SOT-32 / Jedec SOT-32) plastic package. It is designed for reliable operation in audio driver stages, power amplifiers, and general-purpose switching […]