MMBT3904T-7

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The MMBT3904T-7 is a NPN transistor built on a silicon substrate, typically used in a variety of consumer electronics applications. This transistor type, also known as a BJT (Bipolar Junction Transistor) or a ‘Single’ transistor is ideal for use in low voltage, low power applications. It is typically used to switch currents or signals in audio circuits and general purpose switching, allowing a relatively low power-input to operate numerous signals. They are most commonly found in low-noise amplifiers, voltage regulators, and parallel switching applications.

The MMBT3904T-7 has a maximum collector current of 200mA, with a maximum power dissipation of 500mW. It is designed for operation in the 15V to 40V range. The capacitance on the collector is approximately 15pF, and 6pF on the base-emitter junction. It features a maximum operating frequency of over 1MHz and a maximum transition frequency of 100MHz. The input noise current of the MMBT3904T-7 is extremely low, making it one of the best NPN transistors for signal switching and audio applications.

The working principle of the MMBT3904T-7 transistor is based on the movement of charge carriers between two terminals when exposed to an electric field. The first terminal is called the base and the second terminal is the collector. When a voltage is applied to the base, it triggers the movement of electrons from the collector to the base. This triggers a chain reaction which results in the flow of current from the collector to the Emitter which is connected to the ground. This flow of current continues until the base voltage is removed.

The MMBT3904T-7 transistor is often used in amplifier and switching circuits due to its low noise and high switching speeds. In an amplifier circuit, the MMBT3904T-7 is used to amplify a small electrical signal, allowing it to drive a larger current and thus producing more power. In a switching application, it is used to quickly switch a signal between two points. This can be done by controlling the base voltage, thereby determining how much current is allowed to flow.

The MMBT3904T-7 transistor also has multiple uses in the automotive industry, mainly due to its high power ratings and its ability to withstand extreme temperatures. Its wide operating range also makes it ideal for use in low voltage applications where its low power consumption can be beneficial. In addition, its ability to accurately track analog signals makes it a great choice for use in voltage regulators or power converters.

Overall, the MMBT3904T-7 transistor is an excellent choice for any electronics application requiring low noise or power, fast switching speeds and high reliability. Its wide range of uses, from audio circuits to power converters, ensures that it can be used in a variety of applications.

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