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Guangzhou Katoy Electronics Co., Ltd. is a professional custom transformer and magnetic component manufacturer based in Panyu, Guangzhou, China. We specialize in the design, development and production of a full range of magnetic products including audio transformers, low-frequency transformers, high-frequency transformers, toroidal transformers, inductors, reactors, single-phase & three-phase transformers and instrument transformers.<br/>With an in-house R&D engineering team and automated production facilities, we provide one-stop solutions from prototype development to mass production for global clients. Our products are widely applied in industrial power supplies, new energy systems, audio equipment, industrial control, instrumentation and telecommunications industries. Adhering to strict quality control standards and full inspection procedures, we serve customers across Europe, the Middle East, Southeast Asia and the Americas with reliable products, competitive pricing and responsive technical support.
020-32031188

Guangzhou KATOY Electronics Co., Ltd.

Three-Leg Dry-Type Three-Phase Transformer | KATOY

Single-Phase and Three-Phase Transformers are designed for industrial equipment, power systems, automation, renewable energy applications and electrical equipment. They provide stable output, reliable insulation and dependable operation. Custom designs are available for different voltage ratings and installation requirements. KATOY manufactures custom three-leg dry-type three-phase transformers for voltage conversion, power supply, or electrical isolation. Capacity, input/output voltage, vector group, insulation class, terminals, and mounting dimensions can be customized.

Three-Phase Transformer with Fully Insulated Windings | KATOY

Single-Phase and Three-Phase Transformers are designed for industrial equipment, power systems, automation, renewable energy applications and electrical equipment. They provide stable output, reliable insulation and dependable operation. Custom designs are available for different voltage ratings and installation requirements. KATOY manufactures custom three-phase transformers with fully insulated windings for enhanced winding protection and mechanical stability. Capacity, voltage, connection, insulation system, leads, and mounting structure can be customized.

Multi-Winding Multi-Tap Single-Phase Transformer

Single-Phase and Three-Phase Transformers are designed for industrial equipment, power systems, automation, renewable energy applications and electrical equipment. They provide stable output, reliable insulation and dependable operation. Custom designs are available for different voltage ratings and installation requirements. KATOY manufactures custom multi-winding, multi-tap single-phase transformers for multiple voltage outputs or selectable connections. Capacity, input/output ratings, taps, insulation, lead harness, and mounting can be customized.

Single-Phase Mains-Frequency Transformer with Busbar Terminals

Single-Phase and Three-Phase Transformers are designed for industrial equipment, power systems, automation, renewable energy applications and electrical equipment. They provide stable output, reliable insulation and dependable operation. Custom designs are available for different voltage ratings and installation requirements. KATOY manufactures custom single-phase mains-frequency transformers with busbar terminals for reliable high-current connections. Capacity, input/output voltage, winding design, busbar specifications, insulation, and mounting dimensions can be customized.

PRODUCT
Main products
Why choose KATOY
Professional electronic transformer and magnetic component manufacturer, providing stable, reliable, and efficient magnetic solutions for global customers
Quality Assurance
An integrated quality management system covering engineering, manufacturing, inspection and testing ensures consistent quality and long-term product reliability.
Engineering Capability
Our engineering team provides product design, prototype development and technical optimization, supported by flexible OEM/ODM manufacturing services.
Industry Experience
With over 30 years of industry experience, KATOY manufactures magnetic components for professional audio, welding equipment, renewable energy & energy storage, industrial power supplies, industrial automation and medical equipment.
Manufacturing Capability
Advanced production equipment and proven manufacturing processes support both prototype development and volume production with dependable delivery.
Magnetic Component Solutions for Global Industries
Guangzhou KATOY Electronics Co., Ltd.
Founded in 2004, Guangzhou KATOY Electronics Co., Ltd. is a manufacturer of Electronic Transformers and Magnetic Components. Our product portfolio includes High-Frequency Transformers, Low-Frequency Transformers, Toroidal Transformers, Audio Transformers, Inductors, Reactors and other custom magnetic components for applications in welding equipment, professional audio, renewable energy & energy storage, industrial power supplies, industrial automation and medical equipment.
2008
year
Established in Guangzhou, China
m²
Manufacturing Facility
10
900
8000
Skilled Employees
Products Successfully Delivered
ABOUT US

创崴电子,变压器,电感,电抗器,共模电感,磁环电感,低频变压器,高频变压器

PARTNER
Global Trusted Customers

KATOY Showcases Audio Transformers at Prolight + Sound Guangzhou 2026

NEWS
News and Information
23 2026 / 07

CQC certified transformer

KATOY’s DF-EI series low-frequency power transformers are covered by CQC product certification. The certificate includes DF-EI28, DF-EI35, DF-EI41, DF-EI48, and DF-EI57 series, with output voltages from 5.0 to 36.0 VAC and multiple power, current, and winding configurations. Electrical specifications, dimensions, pin layouts, and mounting options can be customized.
10 2026 / 07

GB/T 19001-2016 / ISO 9001:2015 Quality Management System Certificate

Guangzhou KATOY Electronics Co., Ltd. is certified to GB/T 19001-2016 / ISO 9001:2015 for the design, production, and related technical services of power transformers and high-frequency transformers. The certificate confirms that the company operates a structured quality management system covering product development, manufacturing, and quality-control processes.
10 2026 / 07

Utility Model Patent: Miniature Inductor

This certificate confirms KATOY’s utility model patent for a miniature inductor. It reflects the company’s technical development in compact inductor structures and magnetic-component engineering.
10 2026 / 07

Utility Model Patent: Hydraulic Blanking Machine

This certificate confirms KATOY’s utility model patent for a hydraulic blanking machine. It reflects the company’s technical development in dedicated manufacturing equipment and process optimization.
Start Your Custom Magnetic Components Project
From product design and prototype development to volume production,
KATOY provides engineering support and manufacturing services for custom magnetic components.
Custom Design
Fast Response with OEM/ODM Support
Global Service
Supporting Customers Worldwide with Long-Term Partnerships
Reliable Quality
Strict Quality Control for Consistent Performance
Advanced Manufacturing
Automated Production with Lean Manufacturing
Copyright © 2024 Guangzhou KATOY Electronics Co., Ltd. All Rights Reserved.

Katoy Electronics – Custom transformer and magnetic component manufacturer in Guangzhou, China. Reliable quality, custom solutions and global export support.Power inductor and common mode choke for EMI filtering,Line reactor for VFD drives and renewable energy systems

Email: info@gzkatoy.com
Tel: +86 20 3203 1188
Address: No. 28-1, Gongye 1st Road, Tanshan Village, Hualong Town, Panyu District, Guangzhou, China
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