2SC3851A

Series:	--
Packaging:	Bulk
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	4A
Voltage - Collector Emitter Breakdown (Max):	80V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 200mA, 2A
Current - Collector Cutoff (Max):	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	40 @ 1A, 4V
Power - Max:	25W
Frequency - Transition:	15MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Full Pack
Supplier Device Package:	TO-220F

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Introduction

2SC3851A is a single bipolar (BJT) transistor that operates in the NPN configuration. This type of transistor is a three-terminal device commonly used as an amplifier, switch, or an oscillator in a variety of applications. This article will discuss the 2SC3851A application field and working principle.

Application Fields

2SC3851A transistors have been used in a wide range of applications including:

• Amplifier applications
• Switched-mode power supplies (SMPS)
• Lighting circuits
• Solid State Relays (SSRs)
• Audio amplifiers
• Motor speed control circuits
• RF amplifiers
• Mode circuitry

The 2SC3851A transistor is generally considered a superior choice when used in audio amplifiers and switching power applications due to its high speed capabilities and extremely low noise levels, making it a reliable component for use in those circuits.

Working Principle

The 2SC3851A transistor is a type of NPN, or negative-positive-negative, bipolar junction transistor (BJT) that uses semiconductor material such as silicon and germanium. As a three-terminal device, it is commonly used as amplifiers, switches, and oscillators.In the NPN configuration, the transistor needs to be biased in such a way that the base-emitter junction is forward biased and the collector-emitter junction is reverse biased. By applying a current to the base, an amplified current is generated at the collector, which is then fed to the load. The amount of current generated is determined by the resistance of the resistor that connects the base-emitter bias and the current flowing through it.The 2SC3851A transistor can be used for amplification or switching purposes. As an amplifier, it provides excellent amplification characteristics with low noise and high speed. As a switch, it offers high speed when operating with a low on/off ratio. This makes it useful in power control or lighting applications.

Conclusion

The 2SC3851A transistor is a single bipolar (BJT) transistor with applications in a wide variety of circuit designs. It is capable of providing excellent performance with low noise and high speed when operated in an amplifier configuration, or a high on/off ratio when used as a switch. The transistor is a reliable device for use in amplifiers, switching power supplies, lighting circuits, audio amplifiers, motor speed control circuits, RF amplifiers, and mode circuitry.

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