MSD1278H-105KED

Common Mode Chokes Overview

The Coilcraft MSD1278H-105KED is a shielded coupled inductor from the MSD1278H series, designed for high-temperature applications. It features a ferrite core and surface-mount termination. The component has an inductance of 1 mH per winding (4 mH series) with a 10% tolerance. It supports a maximum DC current of 520 mA and has a maximum DC resistance of 2.83 Ohms. Operating temperature ranges from -40°C to +125°C. Dimensions are 12.3 mm x 12.3 mm x 8.05 mm. It is AEC-Q200 qualified.

Common Mode Chokes Feature Summary

• High-temperature capability up to +125°C
• Shielded coupled inductor design
• AEC-Q200 automotive qualification

Common Mode Chokes Applications

• Automotive power supply circuits
• High-temperature industrial electronics
• Coupled inductor filtering applications

Common Mode Chokes Procurement Notes

Verify the specific suffix KED against official Coilcraft documentation to confirm termination style and packaging details. Ensure the part number matches the required inductance and current ratings for your circuit design. Check for RoHS compliance status in the latest datasheet. Confirm availability through authorized distributors as supply may vary.

Common Mode Chokes Selection Notes

Select this component when high-temperature operation above standard limits is required. The 1:1 turns ratio and coupled structure suit specific filtering or energy transfer needs. Verify that the 520 mA current rating meets the application's RMS requirements. Consider the physical footprint constraints given the 12.3 mm square package dimensions.

Common Mode Chokes Part Context

This part belongs to the MSD1278H series, which distinguishes itself from the standard MSD1278 series by offering an extended operating temperature range. The 'H' suffix typically denotes high-temperature variants within Coilcraft's portfolio. It shares similar physical dimensions with other members of the family but differs in thermal performance specifications.

Common Mode Chokes Replacement Considerations

MSD1278T-105KLD is a related variant within the same family but operates at a lower maximum temperature (+85°C). Direct substitution requires verifying if the reduced thermal rating meets the application's environmental conditions. Other MSD1278 series parts may fit mechanically but must be checked for electrical compatibility.