Magnetic Cores: Types, Features, and Applications​

1.Power Magnetic Cores​

(1).Type EE, EEL, and EF Cores​​

Features: Large lead space, easy winding, wide voltage range, high-frequency operation, high output power, excellent thermal stability.
Applications : Programmable switch-mode power supplies, LCD display power units, high-power UPS inverters, computer power supplies, energy-saving lighting systems.

(2).Type EI Cores​​

Features: Compact design, low power loss, temperature-dependent loss reduction, wide frequency compatibility, tightly coupled air gaps.
Applications: Power conversion transformers, DVD power modules, camera flash circuits, communication devices.

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(3).Type ER Cores​​

Features: Circular center column for increased winding area, minimized leakage inductance, high-power capacity.
Applications: Switch-mode power transformers, pulse transformers, electronic ballasts.

(4).Type ETD Cores​​

Features: Circular center column, ultra-low leakage inductance, cost-effective assembly, superior EMI shielding.
Applications: Switch-mode power supplies, transmission transformers, home appliances, medical devices, aerospace systems.

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(5).Type EP Cores​​

Features: Advanced magnetic shielding, low distributed capacitance, multi-output compatibility, uniform magnetic field distribution.
Applications: Broadband transformers, isolation transformers, precision electronics.

(6).Type EFD and EPC Cores​​

Features (EFD): Low thermal resistance, surface-mountable design, lightweight structure.
Applications: Compact high-power transformers for precision instruments, computer modules.

Features (EPC): Excellent electromagnetic shielding with moderate heat dissipation.
Applications: Navigation systems, EMI-compliant.

(7).Type POT and PQ Cores​​

Features (POT): Compact size, balanced magnetic shielding and heat dissipation.
Applications: Carrier frequency filters, high-efficiency sensors, power conversion transformers.

Features (PQ): Low power loss, wide power range (50W–1000W), cost-effective assembly.
Applications: Network infrastructure, medical power systems, industrial drive transformers.

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(8).Type RM and PM Cores​​

Features (RM): Multi-pin terminal design, high-density installation, moderate heat dissipation.
Applications: Broadband transformers, carrier communication systems.

Features (PM): Ultra-low power loss, high power density.
Applications: Ultrasonic cleaning systems, laser equipment.

2.High-Permeability Magnetic Cores​​

1).Type U Cores: High inductance, harmonic suppression. Used in TVs, computers, monitors.

2).Type ET/FT Cores: Low stray capacitance, minimal ripple. For displays, video conferencing systems.

3).Type EE/EEL/EF Cores: High thermal stability. Ideal for EMI filters, small pulse transformers.

4).Type EI and EP Cores: Simple structure, multi-output compatibility. Common in audio transformers.

5).Type RM Cores: High interference resistance, moderate heat dissipation. Used in carrier communication.

6).Type T Cores: High current tolerance, cost-effective. For EMI/RFI filters, audio transformers.