2N4403 – FSC

Overview

The Diotec Semiconductor 2N4403 is a general-purpose PNP bipolar junction transistor (BJT) designed for switching and amplification applications. Its primary function is to control a larger current flow with a smaller input signal, characterized by a maximum continuous collector current (Ic) of 600 mA. A critical design consideration when utilizing the 2N4403 in high-frequency circuits is its gain-bandwidth product (fT) of 200 MHz; while capable, achieving optimal linearity at the upper end of this spectrum often necessitates careful biasing and impedance matching to mitigate distortion and ensure stable operation, a trade-off common in discrete transistor designs.

Key Features

• PNP Bipolar Junction Transistor (BJT)
• Maximum DC Collector Current (Ic): 600 mA
• Collector-Emitter Voltage (VCEO): 40 V
• Power Dissipation (Pd): 625 mW
• Gain Bandwidth Product (fT): 200 MHz
• Through-Hole Mounting, TO-92 Package

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Low-power audio amplification stages
• General-purpose switching in control circuits
• Signal inversion in discrete logic gates
• Bias current generation for active components