240V to 120V Step Down Toroidal Transformer, 2500VA/3000VA

SKU: PH-TT-2500

$784.99

● 2500VA/3000VA single-phase toroidal transformer for reliable 240V to 120V AC step-down conversion. ● Multiple primary and secondary voltage options are available, with custom configurations supported. ● Copper windings provide 90%–96% efficiency, low no-load loss, and stable 50/60Hz operation. ● Features DC 2500V dielectric strength, ≥500MΩ insulation resistance, and CE, RoHS, ISO certifications.

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

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Overview
Specs
Application
FAQ
Reviews

Overview

Toroidal transformer provides efficient single-phase AC power conversion with low electromagnetic interference and quiet operation. Toroidal construction improves winding-to-core alignment, resulting in higher efficiency and lower leakage flux compared to conventional transformers. Standard specifications include 110V/220V/240V AC primary voltage, 2x24V/30-0-30V secondary voltage, copper windings, insulation resistance ≥500MΩ, and voltage strength of DC2500V. Custom voltage configurations are available for specialized system requirements.

Feature

Optimized Efficiency: The core and winding are designed to work together for efficient power transfer.
Durable Service Life: Premium materials and precision manufacturingsupport up to 30 years of use.
Quiet Operation: Seamless core rolling and uniform winding help reduce transformer hum.
Low Electromagnetic Emission: Toroidal structure helps reduce stray magnetic field and radiation.
Low Temperature Rise: Maintains less than 70℃ temperature rise even under 120% overload.

Details

PET Polyester Insulation: Toroidal transformer provides strong electrical insulation for reliable and stable transformer performance.
Protective Design Structure: Helps improve safety and supports dependable long-term use.
Copper Magnet Wire Winding: Uses insulated copper wire for efficient conductivity and stable winding performance.
High Magnetic Flux Core: Designed for reduced noise, minimized interference, and efficient AC power conversion.

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	2500VA (2500W), 3000VA (3000W)
Primary Voltage	240V AC (Optional: 110V, 120V, 220V, 230V, 240V)
Secondary Voltage	2x40V (40-0-40) (Optional: 12V, 24V, 48V, 110V, 220V, 2x6V, 2x12V, 2x15V, 2x24V, 2x30V, 2x35V, 2x40V, 2x50V, can be customized)
Secondary Current	83.33A each winding(2500VA), 125A each winding(3000VA)
No. of Inputs	1 input
No. of Outputs	2 outputs, 4-wire (1 output is 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	<5.96W(2500VA), <6.23W(3000VA)
Voltage Strength	DC2500V
Insulation Impedance	≥500MΩ
Cooling Method	Natural air cooling
Temperature	+40℃
Certification	CE, RoHS, ISO
Warranty	12 months
External Diameter	220mm(2500VA), 225mm(3000VA)
Height	75mm(2500VA), 90mm(3000VA)
Pedestal	220*220mm
Mounting Hole Distance	220*220mm
Weight	18kg(2500VA), 22kg(3000VA)
Package Included	1Toroidal transformer + 1Accesorries sets (Nut, Shim, Metal disk, Rubber gasket, Pedestal, Screw)

Application

PLC Support Circuits

DIY Electronic Projects

Electronic Testing Instruments

Monitoring Equipment

FAQ

Q1: How do I choose the right VA rating for a toroidal transformer?

Add up the load power required by all outputs, then leave margin for startup current, regulation, and heat. A common rule is to choose a transformer with some headroom rather than matching the exact calculated load.

Q2: How do you wire a toroidal transformer correctly?

Follow the maker’s wiring diagram exactly. Dual primaries are typically wired in parallel for 115 V and in series for 230 V; dual secondaries can often be wired in series or parallel depending on the output you need.

Q3: Can a toroidal transformer handle DC offset?

Standard power toroids usually do not handle DC offset especially well; they can become noisy or saturate more easily. Designs with an intentional air gap or special construction can tolerate DC bias better, but that is not true of all toroids.

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From: Sophie | Date: 7/21/2026 12:59 AM

Clean, Quiet Power – Just What My Audio Setup Needed

Swapped out an older EI-core transformer for this toroidal one in my stereo amp build, and the difference was noticeable right away. The hum I used to hear between tracks is completely gone – dead silent now. Runs cool too, even after hours of listening, which I wasn't expecting with this much capacity. Build quality feels solid – copper windings, good insulation, and the whole thing just looks well put together. Handles everything I throw at it without breaking a sweat. If you're building audio gear or anything sensitive to electrical noise, this is the way to go. Worth every penny.