2SD12800SL Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	1A
Voltage - Collector Emitter Breakdown (Max):	20V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 50mA, 1A
Current - Collector Cutoff (Max):	1µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	180 @ 500mA, 2V
Power - Max:	1W
Frequency - Transition:	150MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-243AA
Supplier Device Package:	MiniP3-F1
Base Part Number:	2SD1280

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2SD12800SL, also known as the 2SB1405, is a bipolar (BJT) single transistor with wide application field. It is usually used as amplifier, switch and rectifier. This device can be used from its low voltage to high voltage and widely used in audio amplifier and record player motors.

Description of 2SD12800SL

The 2SD12800SL transistor is a bipolar (BJT) single transistor with collector-emitter voltage of up to 1000 V, collector current up to 15 A, emitter-collector voltage up to 5 V and current gain of up to 100. It has the characteristics of large current transfer ratio hFE, low noise, and high-function characteristics, making it widely suitable for radio frequency (RF) circuits, high frequency amplifying circuits, low frequency amplifying circuits, switching power supplies and DC motors, etc. It has strong anti-interference performance and wide operating range.

Application Field

2SD12800SL is one of the most widely used single transistors and its application fields include:

• Amplifier Circuit: 2SD12800SL is suitable for audio amplifier, low frequency amplification, RF amplifying circuit, and high frequency amplifying circuit.
• Switching Power Supplies: The 2SD12800SL transistor is widely used in power supplies because it has small switching loss and can handle high switching speed.
• DC Motors: 2SD12800SL is widely used in record player motors, as it has excellent switching performance and can handle large voltage.
• Rectifier Circuit: 2SD12800SL is suitable for rectifier circuits in various electrical equipment.

Working Principle

2SD12800SL is a bipolar (BJT) single transistor. It consists of three main components, the collector, the emitter and the base. When a small current is sent to the base, a larger current passes through the collector and emitter, making the device act as an switch or amplifier. The collector-emitter current is called the saturation current, which determines the current gain of the device. The working principle can be described as follows: when the base current is increased, a large current starts to flow through the collector-emitter terminal. This current is large enough to saturate the transistor and the collector current reaches a maximum value until the voltage between the collector and the emitter is the same as the base voltage. Therefore, when the base current is increased, the collector current increases exponentially, and when the base current is decreased, the collector current quickly decreases to a very small value.

Conclusion

The 2SD12800SL is a bipolar (BJT) single transistor which is widely used in audio amplifiers, switching power supplies, record player motors and rectifier circuits. It has excellent switching performance, high current transfer efficiency, low noise and high-function characteristics. It is ideal for many electronic applications and can handle large voltage and current.

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