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• > Vitroperm Cores VP 250 F

This tape wound cores made of nanocrystalline VITROPERM 250 F offer increased bias current capabilities and superior broadband RFI-attenuation in comparison to typical EMI ferrites. They have been designed for all EMI problems with high unbalanced currents, high Common-Mode currents or high DC-Currents.

VITROPERM 250 F offers significant advantages in volume and performance for RFI-noise suppression, for reduction of shaft voltages or as a solution for bearing currents of motors driven by Variable Frequency Drives or high unbalanced currents in Welding Units and some other applications. Based on the high saturation induction of VITROPERM, higher inductance values to attenuate common mode noise and higher leakage inductance to attenuate differential mode noise at the same nominal current can be achieved. Due to low core losses, VITROPERM leads to lower operational temperature of the component. Vice versa, the low core losses and the extended temperature range allow miniaturization of the common mode choke.

In summary common mode chokes with nanocrystalline cores of VITROPERM 250 F offer the following features:

• about 2.5 times higher unbalanced currents than ferrites (µ ~ 5000) for same core size and same number of turns
• broadband insertion loss characteristic with good attenuation performance over a wide frequency band
• small choke size for volume and weight optimized solutions
• simple design and improved product reliability