Description
2N Series General Purpose Transistors – TO-92 NPN/PNP Package
The 2N Series General Purpose Transistors in TO-92 package are versatile and widely used in low-power switching and amplification circuits. These transistors are suitable for a variety of applications including signal processing, small load switching, hobby electronics, and educational projects.
Popular models include 2N2222, 2N2907, 2N3904, 2N3906, and others, available in NPN and PNP variants, making them an essential component in any electronics toolkit.
Key Features
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General-purpose NPN/PNP transistors
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TO-92 plastic package for compact circuits
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Suitable for low to medium current switching & amplification
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Widely used in DIY electronics, education, and prototyping
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Available in multiple models: 2N2222, 2N3904, 2N3906, 2N2907, etc.
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Easy to use in breadboard & PCB projects
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Cost-effective and reliable
| Part No. | Polarity | Ic (max) | Vceo (max) | Pd (max) | hFE Range | fT (typ) | Notes |
|---|---|---|---|---|---|---|---|
| 2N3904 | NPN | 200 mA | 40 V | 625 mW | 100–300 | 300 MHz | Very common small-signal NPN |
| 2N3906 | PNP | 200 mA | 40 V | 625 mW | 100–300 | 300 MHz | Complement to 2N3904 |
| 2N2222 (PN2222) | NPN | 600–800 mA | 40 V | 500 mW | 100–300 | 150–300 MHz | Popular general-purpose switch |
| 2N2907A | PNP | 600 mA | 60 V | 600 mW | 100–300 | 200 MHz | Complement to 2N2222 |
| 2N4401 | NPN | 600 mA | 40 V | 625 mW | 100–300 | 250 MHz | Higher current NPN |
| 2N4403 | PNP | 600 mA | 40 V | 625 mW | 100–300 | 250 MHz | Complement to 2N4401 |
| 2N3704 | NPN | 500 mA | 30 V | 300 mW | 30–150 | 100 MHz | General-purpose NPN |
| 2N3703 | PNP | 200 mA | 30 V | 300 mW | 30–150 | 100 MHz | Complement to 2N3704 |
| 2N5401 | PNP | 600 mA | 150 V | 625 mW | 80–200 | 100 MHz | High-voltage PNP |
| 2N5551 | NPN | 600 mA | 160 V | 625 mW | 80–200 | 100 MHz | High-voltage NPN |