- 4 Montore Rd (PO Box 5230), Minto NSW 2566, Australia
With more than five decades of transformer design and manufacturing experience, Circle C has become one of Australia’s most trusted names in electrical engineering. Our long-standing history reflects our commitment to precision, reliability, and performance.
Proudly based in Australia, we design, prototype, and manufacture locally to the highest national and international standards. Our Australian ownership ensures fast communication, quick turnaround times, and consistent after-sales support.
From concept to commissioning, we handle every stage of production in-house — including consultation, CAD design, winding, assembly, and testing. This means you get a transformer that’s engineered exactly to your specifications, without compromise.
All Circle C products meet or exceed AS/NZS and IEC international standards. Every unit is rigorously type-tested, inspected, and certified to ensure reliability and safety in even the harshest conditions.
Our transformers are built to perform where others fail — from mining sites and railways to renewable installations and coastal industries. With reinforced insulation, precision winding, and durable enclosures, our products thrive in demanding conditions.
We continuously invest in research and development to stay ahead of industry needs. Using advanced design tools and modern materials, we deliver energy-efficient, low-loss transformers that support smarter and greener power systems.
Whether it’s a Power Transformer, Voltage Transformer, Current Transformer, Reactor, or Custom-Built Unit, we offer a complete range under one roof — covering every voltage level, application, and industry requirement.
At Circle C, we don’t just deliver a product — we build lasting relationships. Our technical team provides post-installation support, testing assistance, and maintenance advice to ensure uninterrupted performance throughout your system’s lifecycle.
