MDD255-18N1

Overview

The IXYS MDD255-18N1 is a high-power general-purpose rectifier diode module belonging to the MDD255 series. It features a peak repetitive reverse voltage (Vrrm) of 1800 V and a maximum continuous forward current (If) of 255 A. The device utilizes a Y4-M6 package with screw mounting for secure panel installation. Key electrical characteristics include a maximum forward voltage (Vf) of 1.35 V, a peak non-repetitive forward surge current (Ifsm) of 7.5 kA, and a maximum reverse leakage current (Ir) of 20 mA. Operating temperatures range from -40°C to +150°C.

Feature Summary

• High-voltage capability rated at 1800 V for robust reverse blocking performance
• High-current handling capacity of 255 A for demanding power conversion loads
• Integrated free-wheeling diode configuration within a single compact module housing

Applications

• Industrial motor drives and variable frequency drive (VFD) rectification stages
• High-power DC power supply units requiring reliable high-voltage rectification
• Inverter bridge circuits in renewable energy systems such as solar inverters

Procurement Notes

Verify the specific suffix code against official datasheets to confirm exact electrical tolerances and pinout configurations. Ensure thermal interface materials are compatible with the module's base plate specifications. Confirm availability status directly with authorized distributors as lead times may vary. Validate that the mounting hardware meets the required torque specifications for secure mechanical attachment.

Selection Notes

Select this component when system requirements demand a 1800 V rating combined with 255 A continuous current handling. The Y4-M6 package offers a balance between current density and thermal dissipation capabilities. Consider the 1.35 V forward voltage drop for efficiency calculations in high-current applications. Ensure the cooling solution supports operation up to the 150°C junction temperature limit under full load conditions.

Part Context

This part belongs to the IXYS MDD255 series of high-power diode modules designed for industrial and traction applications. The series provides standardized form factors for easy integration into existing power electronics architectures. These modules are engineered for reliability in harsh environments, offering superior thermal cycling performance compared to discrete diode assemblies.

Replacement Considerations

Direct replacements must match the 1800 V / 255 A specification and Y4-M6 package footprint. Verify equivalent forward voltage and reverse recovery characteristics to maintain circuit performance. Consult manufacturer cross-reference lists for validated substitute part numbers before implementation.