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Smart Switches / Installation

What capacitor should I use for a no-neutral smart switch?

Short answer: Use the capacitor supplied or recommended by the manufacturer for that exact switch model.
Intermediate Last reviewed: 2026-06-26

Explanation

Do not randomly replace the capacitor with an unknown type or value. The capacitor for a no-neutral smart switch is part of the product's installation design and should follow the supplied accessory or official wiring guide.

Using the wrong capacitor, installing it at the wrong location or skipping it when required can cause flickering, unstable operation, offline issues or safety risks. If the included capacitor is missing or damaged, contact the seller or manufacturer for the correct replacement.

Common mistakes

  • Using a random capacitor bought online
  • installing multiple capacitors without guidance
  • placing the capacitor in the switch box when the wiring diagram requires light-side installation.

Troubleshooting / next steps

  • Refer to the exact model wiring diagram. If unsure, ask an electrician to install it at the correct light circuit position.

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