Company Profile
Zhejiang Liujing Rectifier Co., Ltd. (LJ‑MD) focuses on the R&D and manufacturing of power semiconductor devices. Anchored in Yueqing, Zhejiang, we advance a smart manufacturing ecosystem for the next‑generation “Chip 3.0” industry. Our mission is simple and clear: help the earth cool down and benefit humanity through efficient power electronics.
OUR TEAM & CULTURE
We are a team of passionate engineers, technicians, and creators united by a shared pursuit — to make every device safer, more efficient, and more reliable.
At LJ-MD, teamwork is not just collaboration — it’s a mindset that connects every stage of our work, from R&D to final inspection.
Our culture is built on trust, precision, and continuous improvement. We believe that when people grow, products evolve — and customers succeed.
PRODUCTION CAPACITY
Strict QC System
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ISO 9001:2015 Certified
Driving Precision and Reliability in Power Semiconductor Manufacturing
Step into our modern factory — where automation meets craftsmanship.
At LJ-MD, every diode and thyristor is produced through a seamless blend of advanced equipment, strict process control, and skilled expertise.
From material preparation to final testing, we maintain a zero-defect mindset that ensures consistent quality and outstanding reliability in every batch.
Our factory is equipped with modern, dust-controlled workshops and automated assembly lines.
Every process — from chip bonding to encapsulation — is performed in a clean and organized environment to guarantee stable performance and long-term reliability of every diode and thyristor.
LJ-MD integrates precision machinery, high-speed testing systems, and advanced welding technology.
Each production line is operated by skilled technicians, supported by strict process standards that ensure consistency across millions of components every year.
Quality is built into every step of manufacturing.
We conduct 100% electrical and thermal inspections, including surge current (IFSM), reverse voltage (VRRM), and forward voltage (VFM) tests, to make sure every product meets IEC 60747 standards before delivery.
Behind each product stands a professional and disciplined team.
Our engineers and operators work together with precision, responsibility, and pride — maintaining the craftsmanship spirit that has defined LJ-MD for over two decades.
Core Strengths
Certifications & Honors
LJ-MD has been steadily advancing with innovation and commitment to quality, building a trusted brand in the global power semiconductor industry. Our certified systems and products ensure reliability, safety, and sustainability for every application.
Innovations & Insights
Stay informed with the latest news, product updates, and expert insights from LJ-MD and the global power semiconductor industry.
Thyristors and Diodes: A Beginner’s Guide to Power Semiconductor Basics
Stud Rectifier Diode: How to Specify Ratings, Polarity and Mounting Torque
LJ-MD
Is Present In
More Than
LJ-MD
No.428, Jingba Road, Yueqing Economic,ZHEJIANG
Mon – Sat: 8.00am – 17.00pm / Sun: Closed