2SC4957-T1-A

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Voltage - Collector Emitter Breakdown (Max):	6V
Frequency - Transition:	12GHz
Noise Figure (dB Typ @ f):	1.5dB @ 2GHz
Gain:	11dB
Power - Max:	180mW
DC Current Gain (hFE) (Min) @ Ic, Vce:	75 @ 10mA, 3V
Current - Collector (Ic) (Max):	30mA
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-253-4, TO-253AA
Supplier Device Package:	SOT-143

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2SC4957-T1-A Application Field and Working Principle

The 2SC4957-T1-A is a bipolar NPN transistors that is commonly used in RF (Radio Frequency) applications. This transistor is capable of handling high power levels and is robust and reliable with a wide operating range. It is also used to provide amplification and switching in circuits.In this article, we will examine the application field and the working principle of the 2SC4957-T1-A. We will discuss how the transistor works and how it can be incorporated into different electronic systems. We will also talk about the advantages and disadvantages of using this transistor in comparison to other similar devices.The 2SC4957-T1-A is commonly used in RF (Radio Frequency) circuits as an amplifier or switch. It is a rugged transistor and is capable of handling high levels of power, making it suitable for applications where reliability and robustness are important. This transistor is popular for use in a wide range of RF circuits including RF amplifiers, receivers, transmitters, and oscillators. The working principle of the 2SC4957-T1-A follows the same basic concept as any NPN bipolar transistor. It is composed of three layers of semiconductor material: the emitter, the collector, and the base. A positive voltage is applied to the base, which in turn causes electrons to be released from the emitter. These electrons are then attracted to the collector, creating an electric current. The current can be controlled by varying the applied voltage across the base-emitter junction. The gain of the device is determined by the ratio of the collector current to the base current. As with any bipolar transistor, the 2SC4957-T1-A is limited by its input and output capacitances, which in turn limits its frequency response.The 2SC4957-T1-A is a rugged, reliable and robust transistor that is commonly used in many RF applications. It provides a high level of performance, with a wide operating range and low noise figure. This transistor is capable of handling high levels of power and is relatively immune to changes in temperature. Furthermore, it is relatively inexpensive and offers a good return on investment.The main disadvantage of this transistor is its limited frequency range. It is also prone to changes in temperature and the output current is affected by slight variations in the input voltage. Finally, the 2SC4957-T1-A is sensitive to static electricity, meaning that static precautions must be taken when handling it.In summary, the 2SC4957-T1-A is a robust and reliable transistor that is commonly used in RF circuits. It is suitable for a wide range of applications, including RF amplifiers, receivers, transmitters, and oscillators. It is limited in its frequency range and is susceptible to changes in temperature and static electricity. However, it provides excellent performance and is relatively inexpensive, making it a popular choice for many RF applications.

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