BF420,112

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	50mA
Voltage - Collector Emitter Breakdown (Max):	300V
Vce Saturation (Max) @ Ib, Ic:	600mV @ 5mA, 30mA
Current - Collector Cutoff (Max):	10nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	50 @ 25mA, 20V
Power - Max:	830mW
Frequency - Transition:	60MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package:	TO-92-3
Base Part Number:	BF420

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The BF420,112 transistor is a type of bipolar junction transistor (BJT) that is commonly used in many types of electronic applications. It is a single-channel, NPN (negative-positive-negative) type, and is characterized by its balance, high-gain and low-noise. A bipolar junction transistor consists of two PN-junction diodes connected in series. A voltage applied to the "base" of the transistor produces a current flow through the other two terminals, the "collector" and the "emitter". This current flow can be relatively small, depending on the characteristics of the transistor and the applied signal, or it can be relatively large, depending on the signal applied to the transistor. As the collector current changes, the voltage across it also changes, and this induces a current in the emitter that produces an equivalent voltage across the emitter. The total current of the transistor is the sum of the current flowing between the collector and the emitter, a phenomenon known as "current gain". The BF420,112 transistor is an NPN-type transistor with a current gain of approximately 200, meaning that it is capable of amplifying an input signal by a factor of 200. It has a high input impedance, meaning that it is capable of detecting an extremely minute signal, while its very low output impedance enables it to drive a load of any size without significant signal loss. This makes it an ideal choice for a wide range of signal processing, amplifying, and monitoring applications. The BF420,112 transistor is commonly used in audio or communication applications, since its low noise and high fidelity make it an ideal choice for such applications. Its wide current gain also makes it suitable for use in RF circuits, such as oscillators, mixers, and amplifiers. In addition to its uses in audio and RF circuits, the BF420,112 transistor is also quite capable of operating in digital applications. It is often used as a low-side switch, as its low current draw and low-on-resistance facilitate quick switching and low power dissipation. In this type of application, the transistor is typically combined with a transistor driver and is used to control the speed of motors, dim lights, and control individual components. Because of its high current gain and low noise, the BF420,112 transistor can be used in a wide variety of applications. Its ability to handle a wide input and output load, makes it suitable for use in audio and communications applications, while its low power dissipation makes it a great choice for digital signals and power switch circuits. The performance, reliability and versatility of this device make it a popular choice for many types of electronic applications.

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