FERROXCUBE 3F37 Material Data Informations
Ferroxcube's 3F37 is a high-performance MnZn ferrite material engineered for power conversion applications operating in the frequency range of 300 kHz to 1 MHz. It delivers optimal performance around 500 kHz, making it particularly suitable for next-generation highefficiency converters and compact power modules. Characterized by its low core losses and remarkable thermal stability, 3F37 maintains a flat loss profile across a wide temperature range. Additionally, its high saturation flux density (Bsat) supports compact designs with elevated power densities, ensuring reliable operation under demanding electrical and thermal conditions.
- • Low losses over a wide temperature range, ensuring stable performance in demanding thermal conditions
- • High Bsat enabling compact core designs with high power density
- • Broad operating frequency bandwidth up to 1 MHz
Comparison with 3F36
While 3F36 has been a proven material for high-frequency designs, 3F37 represents a step forward in efficiency and thermal stability. At similar flux densities, 3F37 consistently shows lower power losses, particularly at 400–600 kHz, making it the preferred solution for cutting-edge GaN and SiC converters.
For designers already working with 3F36, 3F37 offers a smooth migration path with improved performance at higher frequencies and temperatures while keeping the same permeability.
Steinmetz coefficients – now part of our datasheets
For the first time, Ferroxcube includes Steinmetz coefficients in the 3F37 material datasheet. These parameters are based on measurements performed on T25/15/8 cores and are provided as a practical tool for designers to simulate core losses in their specific operating conditions. The chart below illustrates the remarkable correlation between simulated core loss calculations and actual measured results, underscoring the accuracy and reliability of our modeling approach.
Product range and availability
- Preferred shapes: Planar cores (E, ER, EQ), PQ and RM in small and mid sizes (<40 mm)
- Status: Material fully released and ready for production
- Samples: Available on request; please contact our sales team
