BCX17

Overview

The BCX17 is a small signal PNP silicon bipolar junction transistor designed for general-purpose amplification and switching applications. It features a single-element configuration housed in a surface-mount SOT-23 package. The device supports a maximum collector current of 0.5 A and a collector-emitter breakdown voltage of 45 V. It operates within a temperature range up to 150 °C, ensuring reliability in standard electronic circuits requiring compact form factors.

Feature Summary

• PNP polarity configuration suitable for complementary circuit designs
• Surface-mount SOT-23 packaging for automated assembly
• Silicon construction for stable thermal performance

Applications

• General-purpose amplifier stages
• Electronic switching circuits
• Complementary output stages

Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor's discrete semiconductor division was acquired by ON Semiconductor. Confirm that the specific part number corresponds to the original Fairchild production specifications rather than subsequent ON Semiconductor revisions. Ensure the component matches the required SOT-23 footprint and electrical ratings for your design.

Selection Notes

Select this component when a PNP small-signal transistor with a 0.5 A continuous collector current rating is required. The 45 V breakdown voltage provides adequate headroom for low-voltage logic and analog interfaces. The SOT-23 package is ideal for space-constrained PCB layouts compared to through-hole alternatives.

Part Context

This component belongs to the BCX series of small signal transistors manufactured by Fairchild Semiconductor. The series includes both NPN and PNP variants optimized for audio and general-purpose applications. The BCX17 specifically serves as the PNP counterpart in these complementary pairs, widely used in consumer electronics and industrial control modules during its production lifecycle.