Electrical power supply transformer WL0425

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Product Overview
The ferrite coil transformer WL0425 is a high-frequency magnetic component for voltage conversion, electrical isolation and impedance matching in kHz–MHz applications. Built with a ferrite magnetic core and enameled copper windings, it delivers low core losses and compact size compared with iron-core alternatives. Winding geometry, turns ratio and insulation can be customized to application requirements.

How it works
The transformer uses electromagnetic induction: an AC current in the primary winding produces a changing magnetic flux in the ferrite core which couples to the secondary winding and induces voltage according to the turns ratio. Ferrite cores provide high permeability and low eddy-current losses at high frequencies, improving efficiency in switching power supplies and RF applications.

Main functions

• Step-up / step-down voltage conversion
• Electrical isolation between circuits
• High-frequency power transmission
• Impedance matching in electronic modules

Applications

• Switching power supplies and DC-DC converters
• Communication equipment and RF modules
• LED drivers and lighting systems
• Automotive electronics (EV chargers, BMS, onboard power)
• Industrial control systems, sensors and robotics
• Renewable energy systems (solar inverters, energy storage)
• Medical devices and consumer electronics

Product Datasheet (summary table)
Item: Ferrite Coil Transformer — Description: Enameled copper wire
Wire Diameter: 0.3 mm (other AWG options available)
Winding Type: Single-layer round or sectional winding
Core Material: Ferrite magnetic rod
Footprint length: 25 mm
Encapsulation: Optional varnish, epoxy or coatings
Mounting: Through-foot or custom mounting

Electrical Specifications (Typical)
Parameter: Description
Inductance Range: 0.1 µH – 100 µH (customizable)
Inductance Tolerance: ±2%, ±5%, ±10%
DC Resistance (DCR): Design dependent (custom)
Q Factor: Optimized for specified frequency range
Self-Resonant Frequency: Application dependent, typically high
Operating Frequency: kHz to MHz range
Rated Current: Defined per design
Insulation Resistance: ≥50 MΩ

Advantages

• Low core loss and efficient operation at high frequencies
• Compact, lightweight construction and high power density
• Lower heat generation and improved thermal behavior
• Electrical isolation between windings
• OEM customization of winding, turns ratio, core form and dimensions

Limitations / Considerations

• Not optimized for very low-frequency mains applications
• Risk of core saturation if improperly specified
• High-frequency design requires specialized engineering
• Ferrite cores are mechanically fragile and need careful handling
• Higher development cost for custom prototypes and qualification testing

Troubleshooting notes

• Overheating: may result from incorrect core selection, overload or insufficient cooling — mitigate by reducing load, selecting appropriate ferrite material and improving thermal management
• High losses: caused by unsuitable material or winding design — optimize frequency, winding and core selection
• Output fluctuation: due to incorrect turns ratio or poor regulation — adjust turns and improve circuit regulation
• Excessive EMI/noise: reduce leakage inductance, add shielding and optimize PCB layout and winding arrangement
• Insulation failure: review insulation rating, enhance dielectric design and perform reliability testing

Technical Specifications

• Model: WL0425
• Core material: Ferrite (magnetic rod type)
• Typical footprint length: 25 mm
• Winding conductor: Enameled copper wire (typ. 0.3 mm; other AWG options)
• Winding type: Single-layer round or sectional; custom structures supported
• Inductance range: 0.1 µH – 100 µH (customizable)
• Inductance tolerance: ±2%, ±5%, ±10%
• Operating frequency: kHz to MHz
• Rated current: per custom design
• Insulation resistance: ≥50 MΩ
• Encapsulation options: varnish, epoxy or special coatings
• Mounting options: through-foot or custom arrangements