Comparison with 3F36
Although 3F36 has been a standard in high-frequency designs, 3F37 offers significant improvements in efficiency and thermal stability. At similar flux densities, the new material exhibits lower power losses, particularly between 400 and 600 kHz, making it a preferred choice for next-generation GaN and SiC converters. The transition from 3F36 is straightforward, as it maintains the same permeability, allowing designers to improve the performance of their systems without completely redesigning the topology of existing cores.
Efficiency and thermal stability
• The 3F37 material stands out for its low loss over a wide temperature range, guaranteeing stable performance even under demanding thermal conditions:
• Its high flux density (Bsat) enables compact, high-performance core designs
• The wide operating bandwidth, up to 1 MHz, makes it suitable for next-generation fast switching applications.
These features are especially relevant in systems where efficiency and thermal management are critical, such as high-density DC-DC converters or power supplies for GaN and SiC.
Steinmetz coefficients and loss simulation
For the first time, Ferroxcube includes Steinmetz coefficients in the 3F37 datasheet, based on measurements of T25/15/8 cores. These parameters allow designers to accurately simulate core losses under specific operating conditions. The high correlation between simulated and measured results provides greater confidence in efficiency and heat dissipation calculations, a critical factor in optimizing high-frequency converters.
Forms and availability
The 3F37 material is available in E, ER, and EQ type planar cores, as well as PQ and RM geometries, in small and medium sizes up to 40 mm. This variety facilitates its integration into diverse designs, from compact power supplies to advanced fast-switching modules, offering flexibility to engineers seeking to maximize efficiency and energy density.
About RC Microelectronics
RC Microelectrónica is a company dedicated to the distribution of high-quality electronic components, with a strong presence in the Iberian market. For nearly four decades, it has evolved, adapting to the needs of the sector and expanding its product catalog. As the official distributor of Ferroxcube in Spain and Portugal, RC Microelectrónica offers specialized technical support, helping integrators and purchasing managers select the right parts and plan their supply efficiently. Its approach combines experience, innovation, and reliability, supporting the success of its customers' projects in power electronics and advanced systems.
