T1630 Craftmade 16V 30W Doorbell Transformer

The T1630 16V 30VA transformer is a common step-up transformer for wired doorbell systems that need more capacity than a standard 16V 10VA unit. The voltage stays at 16V, but the 30VA rating gives the circuit more available power for the chime, button wiring, and compatible video doorbell equipment.

Where this transformer fits

Use this transformer when the doorbell equipment calls for 16V and the load is heavier than a basic one-button chime setup. It is often used with longer wire runs, multiple wired chimes, and video doorbells from brands such as Ring, Nest, Lorex, Arlo, and Eufy when their installation instructions allow a 16V transformer with higher VA capacity.

Why 30VA matters

A basic wired doorbell only draws power briefly when the button is pressed. A video doorbell is different because the camera, Wi-Fi radio, speaker, microphone, and charging circuit can place a steady load on the transformer. If the existing transformer is old, unlabeled, or rated at 10VA, the system may buzz, run warm, drop voltage, fail to ring the chime, or cause the video doorbell to report low power.

Before replacing the transformer

• Confirm your chime and video doorbell both support 16V AC.
• Check whether the video doorbell requires a power kit, chime connector, or resistor.
• Do not use a higher-voltage transformer to solve a VA problem unless the whole system is rated for it.
• Have an electrician handle the replacement if you are not comfortable working near household line voltage.

Specifications

• Output: 16V AC
• Capacity: 30VA
• Use: wired doorbells, compatible video doorbells, longer wire runs, and multi-chime systems
• Brand: Craftmade
• Warranty: one year

For more background on transformer sizing, read our guide to choosing a doorbell transformer for video doorbells.