MSD1278H-333MED

Common Mode Chokes Overview

The Coilcraft MSD1278H-333MED is a shielded coupled inductor from the MSD1278H series, designed for surface-mount applications. It features a ferrite core and matte tin over nickel over phos bronze terminations. The component has an inductance of 33 µH with a 20% tolerance. Key electrical parameters include a maximum DC current of 3.05 A and a maximum DC resistance of 95 mOhms. The physical dimensions are 15.1 mm in length, 15.1 mm in width, and 8.6 mm in height. It operates within a temperature range of -40°C to +85°C.

Common Mode Chokes Feature Summary

• Shielded coupled inductor design minimizes electromagnetic interference.
• Ferrite core construction supports stable performance under load.
• Surface-mount termination style facilitates automated PCB assembly.

Common Mode Chokes Applications

• SEPIC converter circuits
• Automotive power supply designs
• High-current DC-DC conversion stages

Common Mode Chokes Procurement Notes

Verify the specific suffix MED indicates matte tin over nickel over phos bronze terminations and machine-ready reel packaging. Confirm RoHS compliance status through official datasheets. Check for availability constraints as this part may be subject to limited stock or factory special order conditions. Ensure the selected variant matches the required thermal and current ratings for the target application environment.

Common Mode Chokes Selection Notes

Select this component when a shielded coupled inductor with high current handling is required for SEPIC or similar topologies. The 15.1 x 15.1 mm footprint offers a balance between size and power capability. Verify that the 95 mOhms DCR meets efficiency targets. Consider the operating temperature range limits for harsh automotive environments.

Common Mode Chokes Part Context

This part belongs to the MSD1278H series of shielded coupled inductors manufactured by Coilcraft. The series is characterized by high saturation currents and low DC resistance, making it suitable for demanding power electronics applications. The H designation typically denotes specific automotive-grade or high-reliability characteristics within the broader MSD1278 family.

Common Mode Chokes Replacement Considerations

MSD1278-333MEB is a related variant within the standard MSD1278 series. Verify if the non-H version meets the specific reliability or automotive qualification requirements of the original design before substitution.