122NQ030R

Overview

The Vishay 122NQ030R is a high-current Schottky rectifier module in the D-67 Half-Pak package. It features a maximum average forward current of 120 A and a repetitive peak reverse voltage of 30 V. The device supports junction temperatures from -55°C to 150°C with a thermal resistance of 0.40 °C/W. Key electrical parameters include a forward voltage drop of 0.49 V at 120 A, a reverse leakage current of 10 mA at 25°C, and a junction capacitance of 7400 pF. It withstands a non-repetitive surge current of 22,500 A.

Feature Summary

• Optimized for very low forward voltage drop with moderate leakage using proprietary barrier technology
• Reliable operation up to 150°C junction temperature
• High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance
• Guard ring design for enhanced ruggedness and long-term reliability

Applications

• Switching power supplies
• Converters
• Free-wheeling diodes
• Reverse battery protection

Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete. Confirm that the specific suffix 'R' matches the required terminal configuration (Lug Terminal Cathode, Base Anode) against the datasheet outline. Ensure mounting hardware meets the specified torque requirements of 40 to 58 Kg-cm for reliable thermal and mechanical performance.

Selection Notes

Select this module when replacing two parallel DO-5 diodes to achieve a lower profile and easier mounting. Consider the 0.40 °C/W thermal resistance for heatsink calculations. Verify that the 30 V rating and 120 A current capacity align with the circuit's peak reverse voltage and average forward current demands under the expected case temperature conditions.

Part Context

This component belongs to the 122NQ series of high current Schottky rectifiers manufactured by Vishay General Semiconductor - Diodes Division. It utilizes the D-67 Half-Pak module case style, designed for base mounting. The series is characterized by silicon carbide Schottky technology optimized for high-frequency operation and high reliability in power electronics applications.

Replacement Considerations

SMC Diode Solutions 122NQ030R-1 is listed as a similar replacement part.