MSD1278H-822MED

Common Mode Chokes Overview

The MSD1278H-822MED is a surface-mount coupled inductor from the Coilcraft MSD1278H series, designed for automotive applications. It features an 8.2 µH inductance with a 10% tolerance and a maximum DC current rating of 6.15 A. The component exhibits a low maximum DC resistance of 30 mΩ and utilizes a ferrite core within a shielded package measuring 12.3 mm x 12.3 mm x 8.05 mm. It operates reliably between -40°C and +125°C and holds AEC-Q200 qualification.

Common Mode Chokes Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Shielded construction to minimize electromagnetic interference
• High current handling capability up to 6.15 A
• Low DC resistance for efficient power transmission

Common Mode Chokes Applications

• Automotive power supply circuits
• DC-DC converter input/output filtering
• On-board charging systems
• Infotainment power distribution

Common Mode Chokes Procurement Notes

Verify the specific suffix MED against official Coilcraft documentation to confirm pinout and tolerance specifications. Ensure compatibility with automated pick-and-place equipment due to the SMD form factor. Confirm that the operating temperature range meets the thermal requirements of the target automotive environment before finalizing procurement.

Common Mode Chokes Selection Notes

Select this component when high current capacity and automotive certification are required. The 12.3 mm footprint offers a balance between current handling and board space. Compare the 30 mΩ DCR against alternative parts to ensure voltage drop constraints are met. Verify that the 6.15 A rating exceeds the peak load currents of the application circuit.

Common Mode Chokes Part Context

This part belongs to the MSD1278H series of shielded coupled inductors manufactured by Coilcraft. The series is engineered for high-current automotive applications requiring robust performance under thermal stress. The H suffix typically denotes enhanced characteristics compared to standard variants, while the MED suffix specifies the particular inductance value and tolerance configuration.

Common Mode Chokes Replacement Considerations

Consult official Coilcraft cross-reference guides for verified substitutes. Ensure any replacement maintains AEC-Q200 qualification and matches the 12.3 mm x 12.3 mm footprint. Verify that the substitute provides equivalent or superior current ratings and inductance values.