BD8/3/10-3C90

Overview

The Ferroxcube BD8/3/10-3C90 is a manganese-zinc ferrite core belonging to the BD series, designed for power transformer and inductor applications. It utilizes the 3C90 material formulation, which provides high initial permeability and low core loss characteristics suitable for switching power supplies. The component features an uncoated surface finish and is supplied as a two-piece set without an air gap. Key geometric parameters include an effective magnetic path length of 24.5 mm, an effective cross-sectional area of 16.0 mm², and an effective volume of 392 mm³. The core factor (ΣI/A) is specified at 1.53 mm⁻¹, supporting efficient winding configurations for compact magnetic designs.

Feature Summary

• Utilizes 3C90 manganese-zinc ferrite material optimized for low energy loss in power conversion circuits.
• BD series geometry provides a robust structure with integrated bobbin mounting holes for secure assembly.
• Uncoated surface finish allows for direct application of protective conformal coatings or potting compounds.

Applications

• Switching mode power supply transformers
• High-frequency common mode chokes
• DC-DC converter inductors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to ensure the correct package configuration and tolerance class. Confirm that the 3C90 material grade matches the thermal and frequency requirements of the target design. Check for RoHS compliance status if operating in regulated regions. Ensure the two-piece set includes all necessary halves for proper magnetic circuit closure.

Selection Notes

Select this component when a balance between high permeability and moderate saturation flux density is required for power applications. The BD shape is particularly advantageous where mechanical stability and easy bobbin integration are priorities over minimal footprint. Compare the 3C90 material properties against alternative grades like 3F3 or 3C94 if higher temperature stability or different loss profiles are needed for the specific operating frequency range.

Part Context

This part belongs to the Ferroxcube BD series of ferrite cores, which are widely used in industrial and consumer electronics. The BD shape is characterized by its rectangular profile and central post, facilitating the use of standard bobbins. The 3C90 material is a standard MnZn ferrite known for good overall performance in the tens to hundreds of kilohertz range, making it a versatile choice for general-purpose power magnetics.

Replacement Considerations

Direct substitutes may include other manufacturers' BD8 equivalents using compatible MnZn materials. Verify dimensional tolerances and magnetic parameters such as initial permeability and saturation flux density before substitution. Alternative Ferroxcube materials like 3C94 or 3F3 in the same BD8 geometry may be considered if electrical characteristics differ significantly from the 3C90 specification.

FAQ

Does the BD8/3/10-3C90 come with an air gap?

No, this specific part number denotes an ungapped core set. An air gap must be introduced during manufacturing if required for inductor applications.

What is the typical application frequency range for the 3C90 material?

The 3C90 material is generally optimized for frequencies ranging from approximately 20 kHz to 500 kHz, depending on the specific power density and temperature constraints.