KSE172STU

Single Bipolar Transistors Overview

The KSE172STU is a discontinued PNP epitaxial silicon transistor manufactured by onsemi, formerly Fairchild Semiconductor. It features an 80V collector-emitter breakdown voltage and supports a continuous collector current of 3A. The device operates with a junction temperature up to 150°C and provides a DC current gain (hFE) ranging from 12 to 250 at specific test conditions. Packaged in the TO-126-3 through-hole format, it offers a collector dissipation of 1.5W at ambient temperature and 12.5W at case temperature.

Single Bipolar Transistors Feature Summary

• PNP epitaxial silicon construction for reliable switching performance
• High-speed switching capability with a transition frequency of 50MHz
• Robust thermal management supporting high junction temperatures

Single Bipolar Transistors Applications

• Low power audio amplifier circuits
• Low current switching applications
• High speed switching applications

Single Bipolar Transistors Procurement Notes

Verify component authenticity as this part is obsolete. Confirm datasheet revision history and manufacturer lineage, noting the transition from Fairchild Semiconductor to onsemi. Ensure replacement components meet identical electrical specifications and package dimensions for direct integration into existing designs without modification.

Single Bipolar Transistors Selection Notes

Select based on required collector-emitter voltage ratings and maximum current handling capabilities. Evaluate thermal resistance characteristics against system heat dissipation requirements. Verify compatibility with existing PCB footprints and mounting constraints associated with the TO-126-3 package style.

Single Bipolar Transistors Part Context

This component belongs to the KSE17x series of PNP transistors, which includes variants with different voltage ratings such as the KSE170 and KSE171. The series is designed for general-purpose amplification and switching tasks within discrete semiconductor product categories.

Single Bipolar Transistors Replacement Considerations

MJE172G

Single Bipolar Transistors FAQ

What is the maximum collector-base voltage for the KSE172?

The maximum collector-base voltage (VCBO) for the KSE172 is 100V.

What is the typical output capacitance of the KSE172?

The output capacitance (Cob) is typically 50 pF when measured at VCB = -10V and IE = 0.

Is the KSE172 suitable for life support devices?

No, the manufacturer explicitly states that products are not authorized for use as critical components in life support devices without express written approval.