MSKD120-16

Overview

The MSKD120-16 is a glass-passivated rectifier diode module with a maximum repetitive reverse voltage of 1600V and an average forward current rating of 120A at a case temperature of 100°C. It features a non-repetitive peak surge current capability of 2800A for 10ms pulses. The module utilizes an aluminum oxide ceramic isolated metal baseplate for thermal management, providing a junction-to-case thermal resistance of 0.26°C/W per diode. Electrical characteristics include a typical forward voltage of 1.43V at 300A and a maximum reverse leakage current of 6mA.

Feature Summary

• Glass passivation provides enhanced protection against environmental degradation and moisture ingress.
• Aluminum oxide ceramic isolation on the metal baseplate ensures high electrical insulation strength while facilitating efficient heat transfer to the heatsink.

Applications

• Non-controllable rectifiers for AC/AC converters
• Line rectifiers for transistorized AC motor controllers
• Field supply circuits for DC motors

Procurement Notes

Verify the specific suffix designation to confirm the exact voltage rating, as the MSKD120 series includes variants for 800V, 1200V, 1600V, and 1800V. Ensure that the procurement documentation explicitly references the datasheet revision date of December 2009 to align with the specified thermal and electrical parameters provided in the official Microsemi documentation.

Selection Notes

Select this component when designing systems requiring robust rectification with high surge current tolerance and reliable thermal performance. The 1600V rating suits medium-voltage industrial applications. Consider the 120A continuous current limit relative to the operating case temperature and ensure the cooling system maintains the junction temperature within the -40°C to 150°C operational range.

Part Context

This part belongs to the MSKD120 family of glass-passivated rectifier modules manufactured by Microsemi. The series shares identical physical dimensions (Case D1) and thermal characteristics across different voltage ratings. The MSKD variant specifically denotes the standard rectifier configuration within this lineup, distinct from the MSAD and MSCD series which may offer different internal configurations or packaging nuances.

Replacement Considerations

Direct replacements must match the 1600V VRRM, 120A IFAV, and Case D1 footprint. Verify that substitute components maintain comparable surge current ratings and thermal resistance values to ensure circuit reliability without redesigning the mounting or cooling infrastructure.

FAQ

What is the maximum non-repetitive forward surge current?

The maximum non-repetitive forward surge current (IFSM) is 2800A for a duration of 10ms at a junction temperature of 45°C.

How is electrical isolation achieved in this module?

Electrical isolation is achieved through an aluminum oxide ceramic layer integrated into the metal baseplate, supporting an isolation voltage of 3000Vrms for one minute at 50Hz.

What is the recommended torque for the terminal screws?

The recommended mounting torque for the M5 terminals is between 2.5 and 4 Nm.