- 4 Montore Rd (PO Box 5230), Minto NSW 2566, Australia
For over five decades, Circle C has delivered reliable, high-performance transformers built to Australian and international standards.
Engineered and manufactured in Australia, our transformers deliver unmatched reliability and performance. Every unit meets strict local and international standards for quality and safety.
We specialize in designing transformers that perfectly match your operational needs. From voltage range to environmental protection, every build is tailored with precision.
For over five decades, Circle C has powered Australia’s leading industries. Our products are trusted for consistent efficiency, durability, and long service life.
For over 50 years, Circle C Transformers has been a trusted name in transformer design and manufacturing.
Proudly Australian-owned and operated, we deliver high-performance power solutions built to meet the toughest industrial, utility, and renewable energy demands.
From power and voltage transformers to custom-engineered solutions, every unit we produce reflects our dedication to quality, innovation, and reliability.
All our products are manufactured and tested in compliance with AS/NZS and IEC standards, ensuring consistent performance in even the harshest environments.
Whether you need a standard transformer or a custom-built design, Circle C provides end-to-end solutions — from consultation and prototype to full-scale production and support.
We don’t just build transformers — we build trust, stability, and long-term value for every client we serve.
For over five decades, Circle C Transformers has powered Australia’s most critical sectors with reliable, high-performance transformer solutions.
Supporting Australia’s energy networks with dependable transformers that ensure voltage stability, accurate metering, and grid reliability across every region.
Rugged and reliable solutions built to perform in harsh, high-temperature environments — powering remote operations, heavy equipment, and safety systems.
Delivering consistent power for factories and production facilities, ensuring smooth operation of machinery, control systems, and industrial automation.
Reliable transformers designed for rail signaling, lighting, and control systems, providing safe and stable power across transport networks.
Energy-efficient transformers built for solar farms, wind turbines, and hybrid systems — supporting the transition toward cleaner, sustainable power.
Custom-engineered solutions designed for high-performance, mission-critical applications where reliability, safety, and precision are non-negotiable.
Explore our complete range of high-quality transformers, power conditioning units, and custom-built electrical solutions — engineered for performance, reliability, and precision.
Ensures a consistent output voltage even under input fluctuations — perfect for sensitive and control applications.
Engineered for current limiting, harmonic filtering, and power factor correction in industrial power systems.
Precision voltage transformer ideal for metering, protection, and instrumentation circuits in low-voltage systems.
Circle C believes in consistent quality and no concession in Quality related issues. Circle C is 1S0-9001-2015 certified company. To answer the call for the protection of our environment Circle C also have ISO 140001-2015 certification. In addition to that health and safety are the topmost priority of our company and Circle C has ISO 45001 :2018 which sets requirements for an occupational health and safety (OH&S) management system.
Need guidance choosing the right transformer? Our engineering team is here to help with tailored technical advice.
Our process combines engineering expertise, precision manufacturing, and quality testing to deliver transformers built for performance and reliability.
We begin with a detailed discussion to understand your power requirements, application, and performance goals.
Our engineers analyze every specification to propose the best technical solution.
Using advanced modeling tools, we design transformers that meet your exact voltage, current, and insulation needs.
Every design complies with international standards and undergoes expert review.
All units are built in our Australian facility using premium materials and strict quality control.
Each transformer is tested for performance, insulation, and safety before dispatch.
We handle safe delivery, installation guidance, and technical after-sales support.
Our partnership continues long after delivery — ensuring reliable performance for years.
