The 2N3904 (NPN) and 2N3906 (PNP) are complementary transistor pairs. Top view or PCB layout view is shown in the lower right corner. Part numbers Pinout of 2N3904 in TO-92 package. The complementary PNP transistor is 2N3906. It is a 200 mA, 40 V, 625 mW transistor with a transition frequency of 300 MHz, with a minimum beta, or current gain, of 100 at a collector current of 10 mA.Įlectrically similar devices, such as the MMBT3904, are available in a variety of small through-hole and surface-mount packages, including TO-92, SOT-23, and SOT-223, with package-dependent thermal ratings from 625 milliwatts to 1 watt. Some manufacturers mark "EBC" on the molded part, but all are required to have those connections for a part which is a "2N3904". When looking at the flat side with the leads pointed downward, the three wires emerging from the bottom are connected to, from left to right, the emitter, the base and the collector. This transistor is a low-cost device, widely available and sufficiently robust to be of use by experimenters and electronics hobbyists. The construction of the 2N3904 and 2N3906 in the 1960s represented a significant performance and cost improvement, with the plastic TO-92 case replacing metal cans. Both types were registered by Motorola Semiconductor in the mid-1960s.ĭevice packaging and specifications It is complementary to the 2N3906 PNP transistor. It is designed for low current and power, medium voltage, and can operate at moderately high speeds. The 2N3904 is a common NPN bipolar junction transistor used for general-purpose low-power amplifying or switching applications. A 2N3904 in a TO-92 package on a breadboard (lower left) The pinout from left to right is: Emitter, Base, Collector. *This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.Common NPN bipolar junction transistor A 2N3904 made by Motorola. The specific choice of transistor will depend on the requirements of the circuit, such as gain, collector current, voltage ratings, and frequency response. These are just a few examples of the many alternative transistors that can be used instead of the 2N2222. ![]() PN2222A: This is the PNP complement of the 2N2222, and it can be used in the same applications as the 2N2222, but with opposite polarities. It is commonly used in high-power switching applications, such as controlling DC motors and solenoids.ĥ. TIP120: This is a NPN Darlington transistor that has a much higher gain compared to the 2N2222. It is widely used in a variety of general-purpose applications, including switching, amplification, and oscillator circuits.Ĥ. 2N3904: This is another commonly used NPN transistor that is similar to the 2N2222 in terms of gain, collector current, and voltage ratings. It has a maximum collector current of 800 mA, similar to the 2N2222.ģ. S8050: This is a NPN transistor with a higher gain compared to the 2N2222, making it a good choice for amplification applications. It is widely used in general-purpose switching and amplification applications.Ģ. BC547: This is a commonly used NPN transistor that is similar to the 2N2222 in terms of gain, collector current, and voltage ratings. Some of the most common alternatives include:ġ. There are several alternative transistor types that can be used instead of the 2N2222, depending on the specific requirements of the circuit. It's widely used in different application such as digital and analog circuits, switching circuit, oscillators, and amplifiers. It can also handle a maximum power dissipation of 625mW. The 2N2222 transistor can handle a maximum collector current of 800mA, and a maximum collector-emitter voltage of 40V. The 2N2222 transistor is also known for its switching capabilities, hence it's widely used in digital circuits. The transistor can be used as a switch or an amplifier depending on the bias applied to the base terminal. The emitter is the negative terminal, the base is the control terminal, and the collector is the positive terminal. The 2N2222 transistor has three regions: the emitter, base, and collector. The 2N2222 is known for its reliability and ease of use. ![]() It was one of the first transistors that were widely used, and it is still used today in a wide range of applications. The 2N2222 is a type of bipolar junction transistor (BJT) that is commonly used as a small-signal NPN transistor. Ultra-Fast Transient Response LDO Regulator Silicon NPN transistor in a TO-92 Plastic Package NPN Small Signal General Purpose Amplifiersīipolar NPN Device in a Hermetically sealed TO18 Metal Package. The transistor is subdivded into one group ![]() NPN SMALL SIGNAL GENERAL PURPOSE AMPLIFIER AND SWITCHĬhip Type 2C2222A Geometry 0400 Polarity NPN
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