We Are Global. We Are Reliable.
We are more than a supplier—we are a bridge. A bridge connecting Chinese craftsmanship with global transformer engineering. From insulation materials to precision components and manufacturing equipment, we deliver solutions built on trust, expertise, and reliability.
Our Story
A Legacy of Excellence, Forged into a New Future
The SIDA story is one of purposeful convergence. Since 1995, four industry leaders—Guangxin, Fengbao, Wanye, and Leadwin—built deep expertise in parallel: insulating materials, composites, precision processing, and global trade.
In 2022, these four forces strategically united to create something more powerful than a merger: a unified, one-stop solution provider engineered to leverage decades of collective R&D, production mastery, and market intelligence. We honor our legacy while boldly building the future of electrical insulation.From those childhood fears, a mission was born: to bring the world insulation materials, transformer components, and equipment that deliver reliability no storm can shake. Since 2005, we’ve turned that promise into solutions trusted by global partners.
Who We Are
Our values are built on three pillars:
Trust
We believe every strong relationship begins with trust. Over the years, we have built long-term partnerships with both suppliers and clients by being transparent, dependable, and solution-oriented. Trust is the foundation that allows us to act not only as a vendor, but as a true partner in success.
- Expertise
With decades of hands-on problem-solving in transformer technology, we bring more than products—we bring understanding. Our deep knowledge of insulation materials, precision components, and manufacturing equipment enables us to anticipate challenges and deliver solutions that meet international standards and unique client requirements.
Reliability
In a world where power cannot fail, reliability is everything. From our in-house processing factory to rigorous quality audits and after-sales support, we maintain absolute commitment to consistent performance. Reliability is not just what we promise—it is what we prove, project after project, partner after partner.
Our Integrated Capabilities:
Why Choose Us
Why do suppliers in China choose to work with you?
Over 300 suppliers across China rely on us as their quality ambassador. We help them meet international standards and deliver consistent reliability.
How many clients trust your services worldwide?
We are proud to serve more than 1,000 global clients who see us not only as a supplier, but as an expert partner in transformer technology and solutions.
What makes your quality control different?
With our own in-house processing factory, we maintain absolute control over every step, ensuring unmatched reliability and performance.
Do you provide after-sales support?
Yes, our dedicated after-sales service team works closely with clients to ensure lasting partnerships and long-term success.