Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Diode Type:	Standard
Voltage - DC Reverse (Vr) (Max):	75V
Current - Average Rectified (Io):	150mA
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 100mA
Speed:	Small Signal =
Reverse Recovery Time (trr):	4ns
Current - Reverse Leakage @ Vr:	100µA @ 100V
Capacitance @ Vr, F:	4pF @ 0V, 1MHz
Mounting Type:	Surface Mount
Package / Case:	SOD-123
Supplier Device Package:	SOD-123
Operating Temperature - Junction:	150°C (Max)
Base Part Number:	1N4148W

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1N4148W-E3-08 Application Field and Working Principle

Diodes – Rectifiers – Single

The 1N4148W-E3-08 is a high-speed switching diode specifically designed for fast switching applications in low current, low voltage (less than 200 volts) circuits. It is frequently used as a rectifier, voltage regulator, and switching diode. It is a special type of diode that has a low forward voltage drop and a low capacitance. This article will focus on the application field and working principle of 1N4148W-E3-08 diodes.

Application Field

1N4148W-E3-08 diodes are widely used in a variety of electronic circuits such as:

• AC to DC rectification circuits
• Voltage clamping circuits
• Open-collector output circuits
• Transistor switching circuits
• Voltage-mode logic circuits
• Oscilloscope fast response circuits
• High-speed logic circuits

1N4148W-E3-08 diodes are also used in many automotive applications, such as relay and solenoid circuits, ECU circuits, and overvoltage protection on wiring harnesses and fuses. They can be used for high frequency power supplies, converters, and flyback-transformer-based circuits.

Working Principle

A diode is an electrical component that is designed to allow current to flow in only one direction. It consists of two electrodes, an anode and a cathode, joined together by a semiconductor chip. The 1N4148W-E3-08 diode is a silicon junction diode and its switching performance is excellent due to its low forward voltage and high-speed switching.The 1N4148W-E3-08 diode is normally non-conductive, meaning that current will not flow until a specific amount of voltage is applied to it. This voltage is called the “cut-in voltage” or “threshold voltage,” and it is dependent on the individual semiconductor’s doping level. When the cut-in voltage is reached, the diode will begin to conduct current. The forward voltage drop of the diode is the amount of voltage lost between the anode and cathode when current is flowing. This voltage drops depending on the current flowing through the diode. The 1N4148W-E3-08 diode has a forward voltage drop of approximately 0.38 volts with a peak surge current of up to 250 milliamps. This is advantageous in many applications, as it reduces losses in the circuit.Once the current reaches the diode’s peak rating, the diode will enter the reverse-bias condition. In this state, current will not flow and electric charge will not accumulate on either of the diode’s contacts. When reverse-biased, the diode acts as an insulator. Its purpose at this stage is to protect the circuit from damage that could be caused by a sudden surge of electrical energy.

Conclusion

The 1N4148W-E3-08 diode is a versatile and effective component for many electronic circuit design applications. Its low forward voltage drop and high-speed switching make it ideal for use in a variety of circuits, from AC to DC rectifiers to oscilloscope fast response circuits. Its ability to quickly switch between forward and reverse bias makes it an excellent choice for open-collector output, voltage-mode logic, and high-speed logic circuits.

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