35-0-35V Toroidal Transformer, 350VA/500VA

SKU: PH-TT-350

$159.99

● 350VA/500VA output capacity supports stable performance in compact electronic systems. ● Operates at 50Hz/60Hz with natural air cooling for dependable daily use. ● Low-noise toroidal core helps reduce hum and interference during operation. ● Temperature rise stays below 70°C at 120% overload for better thermal reliability.

Power *
Primary Voltage (AC) *
Secondary Voltage (AC) *

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Overview
Specs
Application
FAQ
Reviews

Overview

Toroidal transformer supports 120V AC primary voltage, with optional 110V, 220V, 230V, and 240V AC input versions, and offers flexible secondary voltage options including 12V, 24V, 48V, 2x12V, 2x15V, and 2x24V AC to match different application requirements. With 50Hz/60Hz frequency and 90%-96% efficiency, it provides stable and efficient power conversion for relay modules, PLC signal circuits, control boards, and other low-power electrical systems.

Feature

High Efficiency: Optimized winding and core matching help deliver efficient and stable transformer performance.
Long Lifespan: Manufactured with premium materials and proven production technology for long-term use up to 30 years.
Quiet Performance: A seamless core and uniform winding layout help keep operating noise low.
Reduced Radiation: The toroidal core structure helps lower electromagnetic radiation during operation.
Controlled Temperature Rise: The toroidal transformer maintains a temperature rise of less than 70℃ even at 120% load.

Details

PET Polyester Film Insulation: Toroidal transformer provides dependable insulation performance for safe and stable power conversion.
Protective Design: Helps improve operational safety and supports reliable long-term use.
Copper Magnet Wire: Uses insulated copper winding wire for efficient power transfer and stable performance.
High Magnetic Flux Core: Delivers low noise, reduced interference, and efficient transformer operation.

Toroidal Transformer Accessories

Toroidal transformer accessories

Toroidal Transformer Internal Structure

Toroidal transformer internal structure

Wiring Instructions

Without Baseplate Installation

A Pedestal Installation

Specs

Phase	Single phase
Power	350VA (350W), 500VA (500W)
Primary Voltage	220V AC (Optional: 110V, 120V, 220V, 230V, 240V)
Secondary Voltage	12 AC (Optional: 12V, 24V, 48V, 110V, 220V, 2x6V, 2x12V, 2x15V, 2x24V, 2x30V, 2x35V, 2x40V, 2x50V, can be customized)
Secondary Current	1.59A(350VA), 20.83A each winding(500VA)
No. of Inputs	1 input
No. of Outputs	1 output (4-wire 2 outputs are available)
No. of Outputs	Note: For the transformer with 2 outputs 4-wire, each output provides the same voltage and current level, the sum of 2 output power capacities is equal to the total capacity.
Frequency	50Hz/60Hz
Winding Material	Copper Wire
Coil Structure	Toroidal
Efficiency	90%-96%
No-load Loss	<4W(350VA), <4.5W(500VA)
Input Wire	UL1672-18#Red
Output Wire	UL1015-18#Green(350VA), UL1015-16#Brown(500VA)
Voltage Strength	DC2500V
Insulation Impedance	≥500MΩ
Cooling Method	Natural air cooling
Temperature	+40℃
Certification	CE, RoHS, ISO
Warranty	12 months
External Diameter	125mm(350VA), 136mm(500VA)
Height	66mm(350VA), 65mm(500VA)
Pedestal	120120mm(350VA), 140140mm(500VA)
Mounting Hole Distance	110110mm(350VA), 130130mm(500VA)
Weight	4kg(350VA), 5kg(500VA)
Package Included	1Toroidal transformer + 1Accesorries sets (Nut, Shim, Metal disk, Rubber gasket, Pedestal, Screw)

Application

Audio Amplifiers

Power Supply Units

Control Circuits

LED Lighting Systems

FAQ

Q1: Is a 300VA toroidal transformer too small for practical use?

No. A 300VA toroidal transformer is not too small for practical use if the connected load is properly matched. It is a useful choice for many small devices that do not need high output power, especially where efficient design, reduced hum, and compact installation matter more than large capacity.

Q2: Is a 300VA toroidal transformer suitable for standby or auxiliary power sections?

Yes. A 300VA toroidal transformer is a practical choice for standby circuits, auxiliary power sections, and supporting voltage conversion tasks inside larger equipment. It is often selected when the main system does not require high power from the transformer itself.

Q3: What is the advantage of using a 300VA toroidal transformer in small devices?

The main advantage of a 300VA toroidal transformer in small devices is that it combines compact size with efficient AC power conversion. It is especially useful where designers want to reduce installation space, minimize stray magnetic field, and maintain a neat internal layout in small electrical systems.

1 review(s)

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From: Julian | Date: 6/4/2026 8:21 AM

Excellent Low-Noise Toroidal Transformer for Audio Projects

Highly recommended toroidal transformer for DIY audio amplifier projects. I bought this 350VA (230V to 2x12V) unit and it works very well. Very low noise, no hum, runs cool and stable even under load. Compact 125mm size fits my enclosure perfectly. Good build quality with copper winding and fast shipping. Great power supply upgrade for electronics projects.

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