1N4148 Rectifier – 100V, 500mW, Switching Diode ( PDF )

What is 1N4148?

It has a fast switching speed and low forward voltage drop, making it suitable for use in high-speed switching and rectification circuits. It is commonly used in signal processing circuits, such as mixers, amplifiers, and detectors, as well as in power supplies and voltage regulators.

When a positive voltage is applied to the anode, the diode conducts and allows current to flow through it. When a negative voltage is applied to the anode, the diode does not conduct and blocks current flow.

Part Number: 1N4148


Package: Axial Type, DO-34, DO-35 Type

Manufacturer: DC COMPONENTS

Image and Pinouts:
1N4148 Datasheet PDF Switching Diodes


The 1N4148 is Switching Diode, Rectifier. This diode has a maximum forward current rating of 150mA and a maximum reverse voltage rating of 100V. It is housed in a DO-35 package and has a cathode band marked on one end to indicate the polarity.


1. Silicon epitaxial planar diodes

2. Low leakage

3. Low forward voltage

4. High speed switching

5. High current capability

6. High reliability


1. Case: Glass sealed case

2. Lead: MIL-STD-202E, Method 208 guaranteed

3. Polarity: Color band denotes cathode end

4. Mounting position: Any

5. Weight: 0.13 gram

1N4148 Rectifier Diode Datasheet PDF

1N4148 pdf

Other data sheets are available within the file: IN4148, 1N4150, 1N4154

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