Since 2010 · 15 Years in Electrical

Toroidal · Encapsulated High-Frequency

1 PC MOQ, Custom Sourcing Expert

15 years of industry experience, supporting you from selection to delivery. No order is too small, no request is too troublesome.

Browse Products Free Consultation
MOQ
1 pc
Quote Response
24 hrs
Experience
15 yrs
30VA -- 5000VA Low Leakage · Low Noise

Three Major Categories for Most Scenarios

Voltage, power, dimensions, and lead length can be customized. Not sure how to choose? Send me your parameters.

  • FEATURED

    Toroidal Transformers

    30VA ~ 5000VA, Ø82-235mm. Ideal for audio amplifiers, medical devices, EV chargers, and automation.

    View ST Series
  • SPECIALTY

    Encapsulated Transformers

    EI Silicon Steel, 0.35W ~ 30W. Epoxy potted for impact resistance, insulation, and noise reduction.

    View STE Series
  • SUPPORTING

    High-Frequency Transformers

    PQ up to 2000W, EE vertical/horizontal/SMD, EFD/EP compact designs for SMPS and smart homes.

    Consult Selection

Hot Models

  • ST-100W

    100VA · Ø100×55mm

    Audio Amplifiers

  • ST-200W

    200VA · Ø115×60mm

    Medical Devices

  • ST-300W

    300VA · Ø115×70mm

    EV Chargers

  • ST-500W

    500VA · Ø135×75mm

    Automation

  • ST-1000W

    1000VA · Ø150×75mm

    Industrial Control

Why TwiceAll

I don't act as a "middleman",
I act as your supply chain.

Over the past 15 years, I've worked in tech, supply chain, and foreign trade. Sourcing transformers seems simple, but it's full of pitfalls--big factories ignore small orders, and small workshops can't even provide a proper datasheet.

You're already busy enough with R&D, marketing, and production. Leave the transformers to me.

-- TwiceAll

  • No MOQ Pressure

    1 sample, 50 replenishments, or 200 trial productions are all welcome. No need to pile up inventory.

  • Direct Source

    Factory-direct pricing without middleman markups. Full datasheets and test reports provided.

  • 15 Years Experience

    Familiar with transformer selection and foreign trade processes to help you avoid common supply chain traps.

  • Fast Response

    Quotes or solutions provided within 24 hours. No auto-replies; I respond personally.

Case Studies

Two True Stories

Discuss Your Project →

German Audio Client

200VA Silent Toroidal Transformer, 12 Days Delivery

The client required extremely low magnetic leakage and noise reduction. Standard lead time is 6-8 weeks. I worked with engineers to adjust the winding process and optimize leakage distribution, dropping hum to an almost inaudible level. Samples delivered in 12 days.

Now stably repurchasing 30 units per month.

Domestic Thermostat Manufacturer

10W Encapsulated Transformer, Caught the Ship in 3 Weeks

The original supplier delayed the delivery, and the client was in a rush to ship. I matched an existing model, coordinated factory scheduling, and completed everything from drawing confirmation to shipping in 3 weeks, catching their export vessel.

Now a long-term strategic partner.

Send me the parameters, get a solution within 24 hours.

Voltage, power, size limits, application scenarios--even a vague one-sentence requirement works. I'll help turn it into an order-ready datasheet.

  • 1 PC MOQ
  • Personal Reply
  • Full Datasheet
Email hi@twiceall.com Chat on WhatsApp

No order is too small, no request is too troublesome. Even if we don't close a deal, selection advice is free.