BC238

Single Bipolar Transistors Overview

The BC238 is an NPN epitaxial silicon transistor designed for switching and amplifier applications. It features a collector-emitter voltage (VCEO) of 25 V, a continuous collector current (IC) of 100 mA, and a total device dissipation (PC) of 500 mW at 25°C ambient temperature. The component exhibits a DC current gain (hFE) ranging from 120 to 800 depending on the classification grade, with a transition frequency (fT) up to 250 MHz. It operates within a junction temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• Epitaxial planar construction utilizing NPN silicon technology
• Designed for low noise performance in general-purpose amplifier circuits
• Capable of high-speed switching operations with defined saturation voltages

Single Bipolar Transistors Applications

• General purpose small signal amplification
• Low noise audio pre-amplifier stages
• Electronic switching circuits

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer source, as the BC238 is produced by multiple vendors including Fairchild Semiconductor and onsemi. Confirm that the received components match the required hFE classification grade (A, B, or C) specified in your design, as gain ranges vary significantly between these bins. Ensure the package type corresponds to TO-92 specifications.

Single Bipolar Transistors Selection Notes

Select this component when a low-noise NPN transistor with moderate voltage ratings is required. The BC238 offers a balance of current handling and bandwidth suitable for audio and RF signal processing. Consider the BC237 if higher voltage tolerance is needed, or the BC239 for optimized low-noise characteristics in sensitive input stages.

Single Bipolar Transistors Part Context

The BC238 belongs to the BC23x family of NPN epitaxial silicon transistors, which also includes the BC237 and BC239. These devices share similar physical packages and basic electrical structures but differ in breakdown voltage ratings and noise figure optimizations. This family is widely used in consumer electronics and industrial control systems requiring reliable small-signal amplification.

Single Bipolar Transistors Replacement Considerations

BC238BU

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage for the BC238?

The maximum collector-emitter voltage (VCEO) for the BC238 is 25 V.

How does the DC current gain vary across different grades?

The DC current gain (hFE) is classified into three grades: Grade A ranges from 120 to 220, Grade B from 180 to 460, and Grade C from 380 to 800.

Is the BC238 suitable for low-noise applications?

Yes, the datasheet specifies the BC238 as having low noise characteristics, making it suitable for amplifier applications where signal integrity is important.