Toroidal transformer 400 VA – 120 V → 12 V AC | USA version

Toroidal Transformer 400 VA 120 V to 12 V AC Overview

The 400 VA toroidal transformer is designed for operation on 120 V power grids, making it particularly suitable for applications in the USA. It converts 120 V AC to 12 V AC and provides a current of 33.3 A on the secondary side.

Thanks to its toroidal design, the transformer operates efficiently, with low magnetic leakage and relatively quietly. It is particularly suitable for high-performance 12 V low-voltage lighting, halogen systems, and suitable 12 V AC LED applications, as well as for technical installations with corresponding power requirements.

400 VA for high-performance low-voltage applications

With a rated power of 400 VA, the toroidal transformer offers sufficient power reserve for several suitable loads. On the secondary side, 12 V AC is available at a current of 33.3 A.

120 V input for the US market

The 120 V toroidal transformer is specially designed for corresponding US power grids and operates at a mains frequency of 60 Hz. This makes it suitable for export luminaires, US lighting projects, and technical applications with the appropriate input voltage.

12 V AC for halogen and suitable LED systems

On the output side, the transformer delivers 12 V AC alternating current. It is therefore suitable for compatible low-voltage halogen lighting as well as LED luminaires that are explicitly intended for operation with 12 V AC.

Compact toroidal design

With a diameter of 140 mm and a height of 66 mm, the transformer offers a compact design despite its high performance. The toroidal technology supports quiet operation and low magnetic leakage.

Typical areas of application

• 12 V low-voltage halogen lighting
• 12 V AC LED luminaires
• Cable and rail systems
• Architectural and object lighting
• Workshop and technical projects
• US export goods and 120 V applications

Technical data

• Product type: Toroidal transformer
• Manufacturer: Sompex GmbH & Co. KG
• Version: US version
• Design: Toroidal / round
• Primary voltage: 0–120 V AC
• Mains frequency: 60 Hz
• Secondary voltage: 0–12 V AC
• Secondary current: 33.3 A
• Rated power: 400 VA
• Insulation class: Class B
• Material: Plastic
• Color: Silver
• Diameter: 140 mm
• Height: 66 mm
• Application area: Indoor use

Important note

The transformer delivers 12 V AC alternating current and is therefore not suitable for devices that explicitly require 12 V DC direct current.

The total power of the connected devices must not exceed 400 VA. The transformer is intended exclusively for indoor use and should be professionally protected and installed.

Frequently asked questions

For what input voltage is the toroidal transformer designed?

The toroidal transformer is designed for an input voltage of 120 V AC at a mains frequency of 60 Hz.

What output voltage does the transformer provide?

The transformer provides an output voltage of 12 V AC alternating current on the secondary side.

What is the power of the toroidal transformer?

The toroidal transformer has a rated power of 400 VA and provides a secondary current of 33.3 A.

Can the transformer be used for LED lighting?

The transformer can be used for LED luminaires if they are explicitly suitable for operation with 12 V AC alternating current.

What are the dimensions of the toroidal transformer?

The toroidal transformer has a diameter of 140 mm and a height of 66 mm.