What Is the 1N4001? Rectifier Diode (50V) and Uses
The 1N4001 is the lowest-voltage (50 V) member of the 1N400x rectifier family; it carries 1 A. It is used for AC-DC rectification, reverse-polarity protection and freewheeling. The family goes up to the 1N4007 (1000 V), all at 1 A. It is slow; for SMPS use a Schottky/fast diode. The banded side is the cathode.
The 1N4001 is the lowest-voltage (50 V) member of the 1N400x rectifier diode family. It carries up to 1 A and is used for AC-DC rectification, reverse-polarity protection and freewheeling. For the concept, see what is a diode.
What is the 1N4001 used for?
Low-voltage power-supply rectification, adapter/transformer outputs, relay/motor freewheel diodes and reverse-polarity protection. The same family goes up to the 1N4007 (1000 V) for higher voltage; all carry 1 A.
Specifications
| Parameter | Value |
|---|---|
| Type | Rectifier diode |
| Reverse voltage (VR) | 50 V |
| Forward current | 1 A |
| Body | DO-41 (banded side = cathode) |
Limitations
- Only 50 V; for higher voltage choose the 1N4004/1N4007.
- Slow (not for SMPS) → for speed use the UF4001/a Schottky (1N5819).
Equivalents
- 1N4007: same family, 1000 V.
- 1N4004: 400 V.
- UF4001: the fast version.
Find it in our catalog
Use the 1N4001 search.