| Allicdata Part #: | 2N2221CS-ND |
| Manufacturer Part#: |
2N2221 |
| Price: | $ 0.00 |
| Product Category: | Discrete Semiconductor Products |
| Manufacturer: | Central Semiconductor Corp |
| Short Description: | THROUGH-HOLE TRANSISTOR-SMALL SI |
| More Detail: | Bipolar (BJT) Transistor NPN 30V 800mA 250MHz 1.2W... |
| DataSheet: |  2N2221 Datasheet/PDF |
| Quantity: | 1000 |
| Series: | -- |
| Packaging: | Bulk |
| Part Status: | Active |
| Transistor Type: | NPN |
| Current - Collector (Ic) (Max): | 800mA |
| Voltage - Collector Emitter Breakdown (Max): | 30V |
| Vce Saturation (Max) @ Ib, Ic: | 1.6V @ 50mA, 500mA |
| Current - Collector Cutoff (Max): | 10nA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce: | 40 @ 150mA, 10V |
| Power - Max: | 1.2W |
| Frequency - Transition: | 250MHz |
| Operating Temperature: | -65°C ~ 200°C (TJ) |
| Mounting Type: | Through Hole |
| Package / Case: | TO-206AA, TO-18-3 Metal Can |
| Supplier Device Package: | TO-18 |
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Introduction
2N2221 is an NPN silicon bipole commonly used in general applications. It is one of the most commonly used transistors in industrial, consumer and commercial electronics. In this article, we will explore the application field and working principle of 2N2221.
Application Field
2N2221 is primarily used as a general electronic switch require small current from 50 micro-Amp to 800 milli-Amp which allows both digital systems (logic switching) and small audio signals to be amplified.2N2221A is an epitaxial PNP silicon complement transistor for general-purpose applications. Its applications include driver and output stages of audio amplifiers, switching transistors in DTL and TTL applications, and DC and VHF amplifiers.2N2222 is an NPN silicon bipole transistor general-purpose low-power amplifying and switching applications. Its typical applications include driver stages of audio amplifiers, relay, oscillator, and timer circuits, input and output stages factory-automation and test-measurement equipment.
Working Principle
2N2221 consists of three layers of semiconductor materials which are doped with impurities to create a controlled number of charge carriers. The outer layers are generally doped with a N-type dopant and the inner layer is doped with a P-type dopant. This creates three p-n junctions in which each junction has a unique electrical charge distribution.The basic principle of 2N2221 is that when a small current is passed through the base, it reduces the total amount of resistance in the transistor, allowing current from the collector to the emitter. This type of transistor is often called a "current amplifier" because the current signal from the collector can be much greater than the current from the base.The opposite type of transistor is known as a "voltage amplifier", which acts as a impedance reduction device, lowering the voltage from the collector to the emitter. This type of transistor is especially useful for generating high voltage signals with a low current signal.
Conclusion
2N2221 is a versatile and reliable NPN silicon bipole transistor used in various applications such as audio, video, switching and logic circuits. It is widely used in industrial, consumer and commercial electronics, making it one of the most widely used transistors in the world. The working principle is simple, yet very powerful, allowing for current or voltage amplification depending on the type of transistor. Thanks to its simple and reliable design, 2N2221 is a popular choice for many electronics engineers.
The specific data is subject to PDF, and the above content is for reference
| Part Number | Manufacturer | Price | Quantity | Description |
|---|
| 2N2221A | ON Semicondu... | 0.0 $ | 1000 | NPN MED PWR GP AMP TRANSI... |
| 2N2222AE3 | Microsemi Co... | 0.0 $ | 1000 | SMALL-SIGNAL BJTBipolar (... |
| 2N2219AL | Microsemi Co... | 0.0 $ | 1000 | TRANS NPN 50V 0.8A TO-39B... |
| CP191V-2N2222A-CT | Central Semi... | 0.0 $ | 1000 | TRANS NPN AMP/SWITCH CHIP... |
| 2N2218A | Central Semi... | -- | 567 | TRANS NPN 40V 0.8A TO-39B... |
| 2N2221 | Central Semi... | -- | 1000 | THROUGH-HOLE TRANSISTOR-S... |
| 2N2218 | Central Semi... | -- | 1000 | THROUGH-HOLE TRANSISTOR-S... |
| 2N2222AE4 | Microsemi Co... | 3.03 $ | 1000 | TRANS NPN 50V 0.8A TO-18B... |
| 2N2222AL | Microsemi Co... | 6.11 $ | 1000 | TRANS NPN 50V 0.8A TO-18B... |
| 2N2219AE4 | Microsemi Co... | 6.74 $ | 1000 | TRANS NPN 40V 0.8A TO-39B... |
| 2N2221AUB | Microsemi Co... | 6.78 $ | 1000 | TRANS NPN 50V 0.8ABipolar... |
| 2N2218AL | Microsemi Co... | 7.29 $ | 1000 | TRANS NPN 50V 0.8A TO5Bip... |
| 2N2221AL | Microsemi Co... | 7.34 $ | 1000 | TRANS NPN 50V 0.8A TO18Bi... |
| 2N2221AUA | Microsemi Co... | 12.06 $ | 1000 | TRANS NPN 50V 0.8ABipolar... |
| 2N2222AUBTX | TT Electroni... | 13.77 $ | 1000 | TRANS NPN 50V 0.8A SMTBip... |
| 2N2222AUATX | TT Electroni... | 13.78 $ | 1000 | TRANS NPN 50V 0.8A SMTBip... |
| 2N2222AUBTXV | TT Electroni... | 13.94 $ | 1000 | TRANS NPN 50V 0.8A SMTBip... |
| 2N2222AUATXV | TT Electroni... | 16.81 $ | 1000 | TRANS NPN 50V 0.8A SMTBip... |
| 2N2222 | Central Semi... | -- | 3427 | TRANS NPN 30V 0.8A TO-18B... |
| 2N2219A | Central Semi... | -- | 1180 | TRANS NPN 40V 0.8A TO-39B... |
| 2N2219 | Central Semi... | -- | 1122 | TRANS NPN 30V 0.8A TO-39B... |
| 2N2222AUA | TT Electroni... | 13.65 $ | 364 | TRANS NPN 50V 0.8A SMDBip... |
| 2N2222A | Central Semi... | -- | 85421 | TRANS NPN 40V 0.8A TO-18B... |
| 2N2222AUB | Microsemi Co... | -- | 1505 | TRANS NPN 50V 0.8A 3PIN S... |
| 2N2223 | Central Semi... | 0.0 $ | 1000 | TRANS 2NPN 500MA 60V TO78... |
| 2N2223A | Central Semi... | -- | 1000 | TRANS 2NPN 500MA 60V TO78... |
| KT5G-2N2211 | SICK, Inc. | 278.54 $ | 1000 | NPN PERP 20MM |
| 2N2270 | Central Semi... | -- | 661 | TRANS NPN 45V 1A TO-39Bip... |
| CP191V-2N2222A-CT20 | Central Semi... | 105.51 $ | 11 | TRANS NPN 1=20PCSBipolar ... |
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