2N3507

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2N3507 is a small signal bipolar junction transistor (BJT), also known as a general purpose diode (NPN). Developed in the 1970s, it has been widely used in a variety of applications due to its low cost and reliable performance. From amplifying signals to driving power applications, 2N3507 has earned its place as one of the most widely used transistors in the world.

In terms of its physical characteristics, 2N3507 is a relatively small transistor with a maximum power rating of 0.2 watts. It is housed in a TO92 plastic package, with the collector, base, and emitter pins arranged in a line. Despite its small size, this transistor is capable of handling currents of up to 500mA, making it suitable for a wide range of applications. It can also operate in temperatures between -55℃ and +150℃.

2N3507’s most common application is as a switching transistor. Due to its high gain and low cost, it is well-suited for use as a signal amplifier, or driver. It is also often used as an amplifier in operations such as signal mixing and signal gating. Other applications include relay drivers and tone controls.

The working principle of 2N3507 is based on the familiar three-layer transistor structure. An NPN transistor consists of two P regions and an N region between them. When a small current is passed through the base, it switches from an OFF state to an ON state, allowing current to flow from the collector to the emitter. This process is known as switching, and is the basis for many of the applications for which 2N3507 is most commonly used.

Due to its low cost, small size, and reliable performance, 2N3507 has become one of the most popular transistors in the world. Its most common applications are as a signal amplifier, driver, or switching transistor, and its working principle is based on the three-layer transistor structure. Despite its relative simplicity, 2N3507 is capable of handling currents of up to 500mA, making it suitable for a wide variety of applications.

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