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The 1N4148 is a standard silicon switching signal diode. It is one of the most popular and long-lived switching diodes because of its dependable specifications and low cost. Its name follows the JEDEC nomenclature. The 1N4148 is useful in switching applications up to about 100 MHz with a reverse-recovery time of no more than 4 ns.
Various semiconductor diodes. Left: A four-diode bridge rectifier. Next to it is a 1N4148 signal diode. On the far right is a Zener diode. In most diodes, a white or black painted band identifies the cathode into which electrons will flow when the diode is conducting. Electron flow is the reverse of conventional current flow. [2] [3] [4]
The DO-35 (also known as DO-204-AH or SOD27) is a semiconductor package used to encapsulate signal diodes (i.e., diodes meant to handle small amounts of current and voltage). [10] [13] [2] It is often used to package small signal, low power diodes such as 1N4148 (a 100 V, 300 mA silicon diode.)
Diagram of a simple circuit with an inductance L and a flyback diode D.The resistor R represents the resistance of the inductor's windings. A flyback diode is any diode connected across an inductor used to eliminate flyback, which is the sudden voltage spike seen across an inductive load when its supply current is suddenly reduced or interrupted.
Pages in category "Diodes" ... Diode; 0–9. 1N400x rectifier diode; 1N4148 signal diode; A. Avalanche diode; B. Back-to-back connection; Backward diode; BARITT diode;
The 1N4148 and 1N914 are not the same. The reverse current of the 1N4148 is much lower that is why it replaced the 1N914. The 1N914 is speced at 5 microamps reverse current, the 1N4148 25 nanoamps. Other than that, they are basically identical. The reverse recovery time of both is 4 nanosecond, not very fast these days.
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