JANS2N3440UA

Series:	Military, MIL-PRF-19500/368
Packaging:	Bulk
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	1A
Voltage - Collector Emitter Breakdown (Max):	250V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 4mA, 50mA
Current - Collector Cutoff (Max):	2µA
DC Current Gain (hFE) (Min) @ Ic, Vce:	40 @ 20mA, 10V
Power - Max:	800mW
Frequency - Transition:	--
Operating Temperature:	-65°C ~ 200°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	4-SMD, No Lead
Supplier Device Package:	UA

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JANS2N3440UA Application Field and Working PrincipleThe JANS2N3440UA is a PNP general-purpose transistor belonging to the family of Base-Emitter Junction Transistors (BJT), also known as Bipolar Junction Transistors (BJT). It has the ability to amplify signals, allow energy to be transferred from one circuit to another, and also control high-power linear current flow. It is a single-stage class of transistors which are widely used in the field of analog electronics for applications such as audio amplifiers, pre-amps, low-noise amplifiers (LNAs) and switching applications.This commonly used BJT is classified under three main categories. It is a bipolar n-p-n device, which means that the transistor has two active p-n junctions, one between the base and emitter (BE junction) and the other between the collector and emitter (CE junction). Additionally, it is a three-lead device. This device contains three terminals or leads, namely the emitter terminal (E), the base terminal (B) and the collector terminal (C). This type of transistor is a single-stage one, since it contains only one active p-n junction, and as such, it is less susceptible to distortion or parasitic capacitance.The JANS2N3440UA works differently from the traditional two-lead unipolar field-effect transistor (FET). It operates in two stages, with the first stage being a “vacuum” stage and the second stage known as the saturation stage. During the vacuum stage, the base-emitter junction acts as a vacuum, with no current flowing in or out. In the saturation stage, the current at the emitter increases, producing a voltage gain. This voltage gain is determined by the ratio between the base and emitter currents, and is the fundamental difference between BJT and FET operation.The JANS2N3440UA has a maximum DC current gain of 1000, a maximum DC collector current of 800mA, and a maximum DC collector-emitter voltage of 30V. It is capable of providing high-frequency gains of up to 200MHz and features an average noise figure of 0.4dB. It is typically used in applications such as switching circuits, audio amplifiers and general-purpose amplifier circuits.The JANS2N3440UA offers a unique combination of power and precision, making it an ideal choice for a variety of audio and switching applications. Due to its high current gains and low noise figure, it is well suited for use in pre-amp and low-noise amplifier designs. Additionally, it is a relatively low-cost solution for single-stage amplifier circuits, and can be used in both low- and high-voltage applications. In summary, the JANS2N3440UA is a single-stage Base-Emitter Junction transistor, which is a three-lead device that operates in both vacuum and saturation stages. It can provide precision audio or switching applications thanks to its high current gains, wide bandwidth and low noise figures. It is a low-cost solution for dedicated audio and amplifier applications, making it an ideal choice for a variety of applications.

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