Electrolytic Capacitor 390µF 400V
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Prices updated: 12 Oct 2026
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About this product
An aluminium electrolytic capacitor rated 390 µF at 400 V, used for smoothing and energy storage in power supply circuits and other high-voltage applications. It is a polarized component, so it must be connected with the correct polarity.
Specifications
- Capacitance
- 390 µF
- Voltage rating
- 400 V
- Type
- Aluminium electrolytic
- Polarity
- Polarized
Frequently asked questions
What happens if I connect it with reversed polarity?
Reversed polarity can make the capacitor overheat, leak or burst. Always check the polarity marking on the body before soldering.
Can I use it on rectified mains voltage?
Yes, for typical 220V mains rectified to DC, which peaks at about 311V and stays within the 400V rating. Leave some margin for voltage spikes.
