The Part Number is 1N4148, IN4148.
The function of this diode is Small Signal Fast Switching Diode.
Package: DO-25 ( DO-204AH )
Manufacturer: Vishay Telefunken
1N4148 Diode is 100V, 300mA, Rectifier. A switching diode, also known as a fast diode or a high-speed diode, is a type of diode designed specifically for high-speed switching applications. These diodes are characterized by their ability to transition quickly between their conducting (forward-biased) and non-conducting (reverse-biased) states, making them suitable for use in electronic circuits where fast switching times are crucial.
1. Voltage Rating (100V): This indicates the maximum reverse voltage that the diode can handle without breaking down or experiencing a reverse breakdown voltage. In other words, the diode can be reverse-biased up to 100 volts before it may start conducting in the reverse direction due to a breakdown.
2. Current Rating (300mA): This represents the maximum forward current that the diode can handle without becoming damaged. In this case, the diode is rated for a continuous forward current of 300 milliamperes (mA).
3. Switching Diode: The term “switching diode” suggests that this diode is designed for high-speed switching applications. Switching diodes are typically characterized by fast recovery times, low capacitance, and low forward voltage drop.
They are commonly used in applications where rapid on/off switching is required, such as in rectifiers, signal clippers, and voltage clamps.
1. Case : DO-35 (DO-204AH)
2. Weigh t: approx. 105 mg
3. Cathode band color : black
1. Silicon epitaxial planar diode
2. Electrically equivalent diodes : 1N4148 – 1N914
3. Material categorization :
1. Extreme fast switches
Absolute maximum ratings ( Ta=25°C )
1. Repetitive peak reverse voltage : VRRM = 100 V
2. Reverse voltage : VR = 75 V
3. Peak forward surge current (tp = 1 μs) : IFSM = 2 A
4. Repetitive peak forward current : IFRM = 500 mA
5. Forward continuous current : IF = 300 mA
6. Average forward current (VR = 0) : IF(AV) = 150 mA
7. Power dissipation :
( l = 4 mm, TL = 45 °C) Ptot = 440 mW
( l = 4 mm, TL ≤ 25 °C) Ptot = 500 mW