MSD1278H-684KED

Common Mode Chokes Overview

The Coilcraft MSD1278H-684KED is a surface-mount common mode choke from the MSD1278H series. It features a ferrite core and magnetic shielding for compact packaging. The inductance is 680 µH at 100 kHz with a tolerance of 10%. The maximum DC current per line is 790 mA, and the maximum DC resistance is 1.78 Ohms. Dimensions are 12.3 mm x 12.3 mm x 8.05 mm. Operating temperature range is -40°C to +125°C. It is AEC-Q200 qualified.

Common Mode Chokes Feature Summary

• Magnetic shielding provides compact packaging and tight winding-to-winding coupling.
• High-temperature design supports operation up to 125°C.
• AEC-Q200 qualification ensures automotive reliability.

Common Mode Chokes Applications

• Automotive power supply filtering
• Common mode noise suppression in vehicle electronics
• EMI reduction in high-temperature environments

Common Mode Chokes Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm AEC-Q200 compliance status and specific lot traceability requirements before integration into automotive designs. Ensure storage conditions maintain ferrite core integrity.

Common Mode Chokes Selection Notes

Select this component for applications requiring high inductance in a small footprint with strict thermal constraints. Compare DCR and current ratings against circuit load requirements. Consider the 1:1 coupled structure for balanced line filtering needs in automotive systems.

Common Mode Chokes Part Context

Part of the MSD1278H series, designed for high-temperature automotive applications. Features shielded construction to minimize electromagnetic interference. Complements other series like MSD1278 and MSS1278T by offering specialized high-temperature performance and common mode rejection capabilities.

Common Mode Chokes Replacement Considerations

MSD1278H-684 is an unshielded variant of the same series. MSD1278-684KED belongs to the standard MSD1278 series with lower temperature limits. Verify dimensional compatibility and electrical parameters when substituting.