FMB3946

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The FMB3946 from Fairchild Semiconductor is an array package of two To-39 style PNP transistors. It consists of a mechanically linked pair of discrete transistors combined into a single package, thus providing identical electrical characteristics for both transistors. The FMB3946 provides low collector-emitter saturation voltage and low capacitance. It is specially designed for use in power amplifier and linear applications.

The FMB3946 transistors have a relatively high breakdown voltage of 80V, which makes them well suited for high voltage applications. This type of transistor is particularly well suited for use in low power amplifier circuits, such as those found in audio amplifiers. It is also used extensively in switching circuits, as the bipolar transistors’ current gain and collector-emitter voltage rating of 80V are both suitable for this type of application.

The FMB3946 transistors work on the basic principle of junction transistor current flow. The transistors contain two terminals, the base and the collector both linked to each other, and the emitter. The current from the collector to the emitter is controlled by the current flowing from base to emitter. This current controls the voltage applied to the collector and therefore the amount of current flowing from collector to emitter.

The two transistors of the FMB3946 array are connected in common-base configuration and are bridged between two points on a PCB. This provides an extremely low on-resistance, high drive capability and good thermal stability. The FMB3946 transistors also have a low voltage drop between collector-emitter and base-collector. This minimizes voltage losses and ensures optimal output power.

The FMB3946 is a preferred choice for applications due to its high reliability and uniformity, small size and low on-resistance. It is a cost-effective solution for use in applications that require a low voltage, low current, and high current capacity. It is ideal for use in power amplifier and linear applications. Some common applications of the FMB3946 transistors include switching circuits, audio amplifiers, linear regulators, and small power transformers.

Due to its highly efficient, reliable and uniform performance, the FMB3946 is an ideal choice for a wide range of power amplifier and linear applications, as well as for use in switching circuits. It is a very popular choice for designers who are looking for an affordable and reliable transistor array solution.

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