MSD1278H-334KED

Common Mode Chokes Overview

The Coilcraft MSD1278H-334KED is a high-temperature, shielded coupled power inductor from the MSD1278H series. It features a ferrite core and surface-mount termination style with dimensions of 12.3 mm x 12.3 mm x 8.05 mm. The component has an inductance of 330 µH per winding at a 1:1 turns ratio, with a saturation current of 1.3 A and a self-resonant frequency of 2.9 MHz. It operates within a temperature range of -40°C to +125°C and meets AEC-Q200 qualification standards.

Common Mode Chokes Feature Summary

• Magnetic shielding for compact packaging and tight winding-to-winding coupling
• High-temperature operation capability up to +125°C
• AEC-Q200 qualified for automotive reliability

Common Mode Chokes Applications

• Automotive power supply circuits
• High-temperature DC-DC converter designs
• Compact coupled inductor applications requiring magnetic shielding

Common Mode Chokes Procurement Notes

Verify the specific suffix KED against official Coilcraft documentation to confirm termination type and tolerance. Confirm availability status as distribution channels may vary. Ensure the ordering part number matches the required electrical specifications and package variant before procurement.

Common Mode Chokes Selection Notes

Select this component when high-temperature stability and magnetic shielding are required in a compact footprint. The 1:1 coupled configuration suits applications needing balanced dual-winding performance. Verify that the 1.3 A saturation current and 2.9 MHz self-resonant frequency meet the circuit's operational requirements.

Common Mode Chokes Part Context

This part belongs to the MSD1278H series, which specializes in high-temperature shielded coupled power inductors. The series is designed for automotive and industrial environments where thermal stability and electromagnetic interference reduction are critical. The H suffix typically denotes high-temperature variants within the broader MSD1278 family.

Common Mode Chokes Replacement Considerations

MSD1278H-334KLD is a documented alternative within the same series offering similar high-temperature and shielding characteristics. Verify pinout compatibility and exact electrical tolerances before substitution.