Step Up & Step Down Transformer

We are a professional manufacturer specializing in boost and buck transformers. Our products are known for high quality, stability, and efficiency.

Using premium materials and advanced technology, our transformers provide reliable voltage conversion for various industrial applications.

We offer customizable solutions to meet specific client needs, ensuring optimized performance and energy savings.

Committed to excellent service and technical support, we are a trusted partner for safe and efficient power management.

Travel Voltage Converter – DT/ST Series 100VA–1500VA

Reliable travel voltage converter in the DT/ST series (100VA–1500VA) from a manufacturer and OEM/ODM factory,

AC to DC Voltage Converter STU Series STU 100VA–5000VA

Source AC to DC voltage converter units from a trusted manufacturer and OEM/ODM factory, offering

Best Travel Voltage Converter STU Series 100VA–3000VA

Best travel voltage converter STU Series 100VA–3000VA from factory. OEM/ODM, custom design, low MOQ, wholesale

Step Up & Down Toroidal AC Transformer TC/THG Series

TC/THG Series toroidal step-up/step-down transformer (100VA–10KVA) efficiently converts 110–220V AC with low EMI, compact design,

100VA–10KVA Step Up & Down Toroidal Transformer 110V–220V AC Voltage Converter

TC/THG 110V–220V AC Voltage Converter toroidal step-up/step-down transformer (100VA–10KVA) efficiently converts 110–220V AC with low

110V – 220V Step Up Down Transformer ZX Series 500VA–2000VA Toroidal Converter

ZX Series toroidal step up/step down transformer (500VA–2KVA) efficiently converts 110–220V AC with low EMI,

1000VA Step Up & Down Transformer 110V to 220V Toroidal Voltage Converter ZX Series

ZX Series toroidal step-up/step-down transformer (500VA–2KVA) efficiently converts 110–220V AC with low EMI, compact size,

Johsun Tec Step Up & Step Down Transformer Manufacturer

Johsun Tec offers several step‑up/step‑down transformer series, with the following key specifications:

Voltage range (typical models):

Input: 110–120 V AC or 220–240 V AC (selectable input taps)
Output: 220–240 V AC or 110–120 V AC, supporting bidirectional conversion (110→220 and 220→110)

Power ratings:

DT/ST Series: 100 VA to 10 kVA (100 W to 10 000 W)
STU Series: 100 VA to 5 kVA
TC/THG Series: 100 VA to 10 kVA

General features:

Single‑phase (standard)
50/60 Hz frequency
Toroidal core design with low EMI, compact size, and quiet operation

Professional Manufacturing

Automatic Voltage Converter Factory

With a production history since 2007, our facility in the Xiangyang Industrial Zone integrates advanced R&D with rigorous ISO9001:2008 standards. We ensure a 100% yield through multiple stages of technical debugging, delivering certified power solutions to over 20 countries worldwide.

Voltage Regulators

Engineered with high-sensitivity response technology to ensure a consistent, safe voltage output.

Power Transformers

uilt with premium copper/aluminum materials for superior heat dissipation and low energy loss.

Smart Solar Inverter

High-efficiency power conversion optimized for solar photovoltaic ecosystems.

Best voltage converter company

We supply a wide range of 110V-to-220V and 220V-to-110V converters.

Trust our quality

Certifications & Quality Standards

Combining innovative technology with stringent quality standards to meet global demands.

Download Our Step Up & Step Down Transformer Catalog

Access our latest product catalog to explore the full range of voltage stabilizers and power regulation solutions. The catalog includes detailed specifications, model comparisons, technical parameters, capacity selection guidance, and customization options to help you choose the right solution for your market.

Inside the catalog, you will find:

Relay Type, Servo Motor Type & Static Type Models
Input/output voltage configurations
Protection features and application scenarios
OEM / ODM customization information

Source factory

What is the difference between a step‑up and step‑down transformer?

A step‑up transformer increases voltage from primary to secondary (e.g., 110 V → 220 V), while a step‑down transformer decreases voltage (e.g., 220 V → 110 V). Johsun Tec transformers can operate in both modes.

Which devices are suitable for Johsun Tec step‑up/step‑down transformers?

Our transformers are suitable for TVs, computers, printers, audio equipment, kitchen appliances, medical devices, and industrial control panels in residential, commercial, and industrial environments.

How to choose the right kVA rating for my load?

Select a transformer rating that exceeds the total load rating by 20–25%. For example, a 1000 W load should use at least a 1.2–1.25 kVA transformer.

Can 110 V and 220 V outputs be provided at the same time?

Yes, some DT/ST and STU models offer dual‑voltage output sockets, allowing 110 V and 220 V outputs simultaneously.

Are these transformers compatible with 50 Hz and 60 Hz systems?

Most standard models are designed for 50/60 Hz, suitable for worldwide grid systems.

Can you customize special voltages (e.g., 100 V, 230 V, 277 V)?

Yes. Johsun Tec offers custom winding solutions for special voltages and frequencies upon request.

Do these transformers require professional installation?

For standard single‑phase models, simple connection between the grid and load is sufficient; however, installation by a qualified electrician is recommended for safety.