1N4148 – Fast Switching Diode, Rectifier

This is one of the diode types.

Part Number: 1N4148

Function: 100V, 300mA, Fast Switching Diode

Package: DO-35 Type

Manufacturer: Won-Top Electronics

Image and Pinouts:

1N4148 datasheet


This is Fast Switching Diode. The 1N4148 is a small signal diode that is commonly used in electronic circuits. This diode is designed for general-purpose applications such as signal rectification, high-speed switching, and protection in electronic circuits. It is often used in applications like signal detection, clipping circuits, and voltage clamping.

A fast-switching diode is designed to have a short reverse recovery time, allowing it to quickly switch from conducting to non-conducting state and vice versa. This characteristic makes it suitable for applications where fast switching speeds are required, such as in high-frequency circuits and digital systems.


1. Silicon Epitaxial Planar Die Construction
2. Glass Package Version for High Reliablity
3. Fast Switching Speed
4. High Conductance

Mechanical Data

1. Terminals : Plated Leads Solderable per MIL-STD-202, Method 208
2. Polarity : Cathode Band
3. Weight : 0.13 grams
4. Marking : Type Number

1N4148 PDF Diode

1N4148 pdf

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