1N5401 General Purpose Plastic Rectifier Diode 3A 100V
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Prices updated: 12 Oct 2026
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About this product
The 1N5401 is a 3 A, 100 V general-purpose plastic rectifier diode. It is used for rectification in low-voltage DC power supplies, freewheeling and reverse polarity protection, as long as the reverse voltage stays within its 100 V rating.
Specifications
- Diode type
- General purpose rectifier, plastic
- Maximum reverse voltage
- 100 V
- Average forward current
- 3 A
- Package
- DO-201AD (axial)
Frequently asked questions
Can I use the 1N5401 directly on 230 V AC mains?
No. Its 100 V reverse rating is below the peak of 230 V AC mains (about 325 V). For mains rectification, choose a diode with a higher reverse voltage, such as the 1N5406.
Can I use the 1N5401 for reverse polarity protection?
Yes, it can be placed in series with the supply so it conducts only when the polarity is correct. Note that it causes a forward voltage drop of roughly 0.7 V to 1 V, which must be accounted for in low-voltage circuits.
