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Views: 0 Author: Site Editor Publish Time: 2025-12-23 Origin: Site
The shape of your transformer or inductor core (EI, UI, Toroidal) directly impacts efficiency, cost, and noise. Choosing the right core is the first step to optimizing your product design.
| Feature | EI Core | UI Core | Toroidal Core |
| Magnetic Path & Efficiency | Standard, with losses at joints | Better, shorter and more efficient path | Best, continuous and seamless for highest efficiency |
| Noise & Interference | Audible hum, higher EMI | Lower noise, moderate EMI | Extremely quiet, very low EMI |
| Cost & Manufacturing | Lowest cost, easiest to automate | Moderate cost | Higher cost, complex winding process |
| Typical Applications | Chargers, adapters, general power supplies | Inductors, chokes, compact designs | High-end audio, medical equipment, precision instruments |
Choose EI Cores: For maximum cost-effectiveness and high-volume production in general power applications.
Choose UI Cores: When you need better efficiency than EI and a compact magnetic path for specific inductor designs.
Choose Toroidal Cores: When pursuing top-tier performance requiring the highest efficiency, lowest noise, and minimal interference.
The bottom line: There's no single best shape, only the most suitable one for your needs. Match the core to your key priorities—cost, performance, or size.
Contact us for expert selection advice and high-quality silicon steel core products.
