BC338-40

Single Bipolar Transistors Overview

The BC338-40 is an NPN silicon small signal transistor manufactured by Taiwan Semiconductor Corporation. It is housed in a TO-92 plastic package and designed for switching and audio frequency amplifier applications. The device features a collector-emitter breakdown voltage of 45V, a continuous collector current rating of 800mA, and a total power dissipation of 625mW at 25°C ambient temperature. The -40 suffix indicates a specific DC current gain group with a minimum hFE of 100. It supports junction temperatures up to 150°C and includes lead-free, halogen-free construction.

Single Bipolar Transistors Feature Summary

• Suitable for general-purpose switching and audio frequency amplifier circuits
• Lead-free and RoHS compliant construction with halogen-free green compound
• Matte tin plated terminals ensuring solderability per MIL-STD-208 standards
• Capable of withstanding high-temperature soldering conditions

Single Bipolar Transistors Applications

• General-purpose switching applications
• Audio frequency (AF) amplifier circuits

Single Bipolar Transistors Procurement Notes

Verify the component marking code matches the BC33x-40 designation on the physical device. Confirm the presence of the 'G' prefix in the date code or suffix in the packing code to ensure compliance with the halogen-free green compound specification. Check terminal plating for matte tin finish to guarantee solderability requirements are met.

Single Bipolar Transistors Selection Notes

Select this variant when a higher minimum DC current gain is required compared to the -16 or -25 groups. Ensure the application operates within the 45V collector-emitter voltage limit and does not exceed the 800mA continuous current rating. Verify that the thermal management allows for 625mW dissipation within the specified temperature range.

Single Bipolar Transistors Part Context

This component belongs to the BC337/BC338 series of NPN transistors produced by Taiwan Semiconductor. The series is categorized into three gain groups (-16, -25, and -40) based on DC current gain performance. The BC338 variant specifically offers an 800mA collector current capability, distinguishing it from the lower-current BC337 model.

Single Bipolar Transistors Replacement Considerations

Compatible substitutes include other BC338-40 variants from different manufacturers. Cross-referencing with BC337-40 is possible if the application current requirements do not exceed 500mA.