Guangzhou Katoy Electronics Co., Ltd.
We specialize in research, development, and production of custom transformers (power, audio, SMPS), magnetic components, and OEM/ODM manufacturing
Design and manufacturing of power transformers
EI cores, toroidal types
Custom transformer assembly
for applications like audio gear, medical devices, industrial control or power conversion systems.
igh-frequency transformers, inductors, or magnetic components
supporting SMPS, LED drivers, EV charging, or industrial equipment.
OEM/ODM services
transformer and electronics manufacturing services—OEM/ODM, custom build and delivery, and technical support
A statement from Our Founder and chief engineer
At Katoy, we believe in doing business with integrity, quality, and a down-to-earth approach. Our focus is on delivering efficient, high-quality products at fair prices. We’re committed to supporting our team through skill-building and wellness initiatives, and we take environmental responsibility seriously in everything we do. Product development and customer satisfaction are at the heart of what we do — and we never stop striving to get better at both.
Mr. Liangqiang Guo
Founder & CTO, KATOY
BEng, Electronic Engineering,
30+ years in transformer technology｜20+ patents
