MMBT3904K

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	200mA
Voltage - Collector Emitter Breakdown (Max):	40V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 5mA, 50mA
Current - Collector Cutoff (Max):	--
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 10mA, 1V
Power - Max:	350mW
Frequency - Transition:	300MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	MMBT3904

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MMBT3904K is a PNP type Bipolar Junction Transistor, commonly known as BJT. It belongs to the family of single transistors and is widely used in a variety of applications in the electronics industry. This junction transistor has a gain of around 500 and can withstand high power dissipation. It is also used in low noise amplifier and switching applications. In this article, we will explore the applications and how the MMBT3904K transistor works.

What is MMBT3904K?

MMBT3904K is a Bipolar Junction Transistor (BJT) from the family of single transistors. It belongs to the PNP type transistors having a collector-to-emitter voltage of 40V, a current gain of 500 at a collector current of 1mA, and a maximum power dissipation of 625mW. The MMBT3904K is particularly useful for low noise amplifier and switching applications. It consists of PN junction connected together and the base region is designed to control the current flow between the collector and the emitter region.

What are MMBT3904K Applications?

MMBT3904K transistors are used in a wide range of applications such as switching, amplification, and low noise amplifiers. It is used in audio/video circuits, power supplies, relays, resistors, and many other applications. In addition, they are also used in medical devices, wearable devices, and sensors. They are used in the automotive electronics industry for the control of fuel pumps, electronic brakes, headlights, and other parts of the car.MMBT3904K transistors can also be used for low noise amplifier applications. These amplifiers are used for a range of applications such as audio receivers, mixers, and digitally modulated signals. The high current gain of these transistors makes them particularly suitable for low noise amplifier designs.

How does MMBT3904K work?

MMBT3904K is an NPN type transistor and when it is biased, the electrons from the base region flow through the collector and emitter region. This produces a current flow which is controlled by the base current. The current gain of the MMBT3904K transistor is determined by the ratio of collector current to the base current. When a small base current is applied, it causes a large collector current. This is due to the current gain effect. The base-emitter junction of the MMBT3904K transistor controls the flow of current and the base-collector junction acts as a current source. The transistor can be biased in either forward or reverse mode, with each having its own advantages. In forward bias mode, the collector current is affected by the changes in the base current, but in reverse bias mode, the collector current is reduced.

Conclusion

MMBT3904K is a widely used PNP type Bipolar Junction Transistor and it is used in a wide range of applications including switching, low noise amplifiers, and audio/video circuits. The high current gain and power dissipation of the MMBT3904K make it suitable for many applications. The transistor works by controlling the current flow between the collector and emitter region and can be biased in either forward or reverse mode.

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