2N3904

The 2N3904 is a small, common NPN BJT transistor used for general purpose low-power amplifying or switching applications. It is designed for low current and power, medium voltage, and can operate at moderately high speeds.

It is a 100 milliamp, 50 volt, 300 milliwatt transistor capable of operating up to 100 MHz, with a beta of at least 100. It's used in a variety of analog amplification and switching applications.

It is available in a variety of small through-hole and surface mount packages including TO-92, SOT-23, and SOT-223.

A 2N3906 is a complementary (PNP) transistor for the 2N3904. The 2N2222 is an NPN transistor that can safely switch 10 times as much current as the 2N3904 but has otherwise similar characteristics.

External links

• Datasheet for Fairchild Semiconductor's typical 2N3904 (PDF)
• Datasheet for NXP Semiconductor's 2N3904 (PDF)

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