BUX22 NPN Silicon Power Transistor

The BUX22 is a high-power NPN silicon multiepitaxial planar transistor designed for heavy-duty switching and linear applications. It is part of a specialized class of transistors capable of handling very high currents—up to 40 Amperes—making it a staple in industrial power control systems. Common applications include high-performance switching regulators, DC-DC converters, motor controls, and high-power audio amplifiers. Its design focuses on robustness and efficiency, featuring fast switching speeds and a low saturation voltage to minimize power loss during operation. The TO-3 metal can package is essential for this device, as it provides the necessary thermal surface area to dissipate the significant heat generated when running at high power levels. This transistor is built for reliability in environments where standard components would fail under high electrical and thermal stress.

Key Features:

Continuous collector current (IC) capability of 40 Amperes.

Peak collector current (ICM) of 50 Amperes.

Total power dissipation (PD) of 250 Watts at 25 degrees Celsius case temperature.

Low collector emitter saturation voltage typically 1.2 Volts at 20 Amperes.

Heavy-duty TO-3 (TO-204AE) metal can package for high power handling.