PN4249

Single Bipolar Transistors Overview

The PN4249 is a PNP silicon small-signal bipolar junction transistor manufactured by Fairchild Semiconductor. It is designed for low-level and low-noise amplifier applications. The device features a maximum collector current of 0.5 A and a collector-emitter breakdown voltage of 60 V. It utilizes a TO-92 cylindrical plastic package with three terminals. The component operates at a maximum junction temperature of 150 °C and meets RoHS compliance standards.

Single Bipolar Transistors Feature Summary

• Designed for low-level signal amplification
• Optimized for low noise performance
• Utilizes standard TO-92 through-hole packaging

Single Bipolar Transistors Applications

• Low noise audio pre-amplifiers
• General purpose signal amplification circuits
• Small signal processing stages

Single Bipolar Transistors Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor assets were acquired by onsemi. Confirm the specific datasheet version to ensure parameter alignment with design requirements. Check for lead-free (Pb-free) markings to verify environmental compliance status against project specifications.

Single Bipolar Transistors Selection Notes

Select this component for circuits requiring PNP topology with moderate current handling capabilities. Ensure the application voltage does not exceed the 60 V collector-emitter rating. Consider the thermal characteristics and package size constraints when integrating into the printed circuit board layout.

Single Bipolar Transistors Part Context

This component belongs to the family of general-purpose PNP transistors intended for analog signal processing. It serves as a discrete semiconductor solution for amplifying weak signals in consumer electronics and industrial control systems where low noise figures are critical for signal integrity.

Single Bipolar Transistors Replacement Considerations

Verify compatibility with equivalents such as the BC327 series or generic 2N-series PNP transistors. Confirm pinout alignment and electrical parameter margins before substitution.