In the world of modern electronics, PCB transformers play an essential role in ensuring safety, stability, and performance. Whether you’re designing a smart home device, an industrial controller, or a medical power supply, understanding what a PCB transformer is—and how it works—can help you choose the right solution for your application.
1. What Is a PCB Transformer?
A PCB transformer (Printed Circuit Board transformer) is a compact type of transformer designed to be mounted directly onto a PCB. It provides electrical isolation and voltage conversion within electronic circuits.
Unlike traditional power transformers, PCB transformers are smaller, lighter, and optimized for low to medium power applications such as:
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Power supplies for electronics
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Communication equipment
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Measurement instruments
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LED drivers
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Control boards
Their compact size and efficient design make them ideal for high-density circuit layouts.
2. How Does a PCB Transformer Work?
Just like any transformer, a PCB transformer operates on the principle of electromagnetic induction. It consists of:
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Primary winding (input side)
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Secondary winding (output side)
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Magnetic core (ferrite or laminated steel)
When an AC voltage is applied to the primary coil, it creates a magnetic field that induces voltage in the secondary coil—allowing safe voltage step-up, step-down, or isolation between circuits.
3. Key Advantages of PCB Transformers
✅ Compact & Lightweight: Perfect for PCB-mounted applications.
✅ High Efficiency: Optimized winding and core design minimize power loss.
✅ Safety Isolation: Protects sensitive circuits from high voltage.
✅ Customizable: Can be tailored for specific voltage, frequency, and footprint requirements.
✅ Cost-Effective: Streamlined manufacturing and mounting reduce assembly costs.
4. Common Types of PCB Transformers
At Yunleeb, we manufacture various types of PCB transformers, including:
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EI Type PCB Transformers – cost-effective, widely used for low-frequency applications.
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Toroidal PCB Transformers – compact with low electromagnetic interference (EMI).
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Encapsulated PCB Transformers – resin-molded for enhanced moisture and dust protection.
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High-Frequency PCB Transformers – ideal for switching power supplies (SMPS).
Each type can be customized according to voltage, current, size, and safety standards (UL, CE, RoHS, etc.).
5. Applications of PCB Transformers
PCB transformers are found in almost every modern electronic device, including:
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Power adapters
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Communication systems
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Smart home devices
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Medical equipment
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Industrial automation systems
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Consumer electronics
Their versatility makes them one of the most critical components in any power management system.
6. Why Choose Yunleeb?
We are Yunleeb, a China-based manufacturer specializing in custom transformers, coils, and inductors.
With 10+ years of OEM/ODM experience, we offer:
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Tailor-made transformer design & engineering support
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Reliable quality control and safety certification
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Fast sampling and mass production
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Competitive factory pricing
We’ve helped hundreds of global clients develop efficient, compact, and durable transformer solutions for their projects.
👉 Learn more or request a custom quote at: www.yunleeb.com
7. Conclusion
A PCB transformer is more than just a component—it’s the foundation of safe, efficient, and reliable power conversion in electronics. Whether you need a standard model or a fully customized design, choosing the right transformer partner can make all the difference in your product’s performance.
Yunleeb is ready to be your trusted partner for custom transformer solutions.
📩 Contact us today to discuss your next project!
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