120NQ045

Overview

The Vishay 120NQ045 is a high-current Schottky rectifier module in the D-67 Half-Pak case style. It features a maximum DC reverse voltage of 45 V and an average forward current rating of 120 A at a case temperature of 106°C. The device utilizes proprietary barrier technology to achieve a low forward voltage drop of 0.52 V at 120 A peak current and a junction temperature of 125°C. It supports operation up to a maximum junction temperature of 150°C, with a thermal resistance from junction to case of 0.40°C/W.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific suffix designation (R) against the datasheet requirements, as it may indicate specific packaging or testing variations. Confirm that the D-67 Half-Pak mounting dimensions and torque specifications align with the target heatsink interface. Ensure the application environment respects the 150°C maximum junction temperature limit and the specified thermal resistance values for proper heat dissipation calculations.

Selection Notes

Select this component when a single module solution is required to replace two parallel DO-5 packages, offering a lower profile and easier mounting. Consider the 120A average current rating and 45V reverse voltage capability for high-frequency applications requiring low forward voltage drop. Evaluate the thermal management strategy based on the 0.40°C/W junction-to-case resistance and the allowable case temperature curves provided in the datasheet.

Part Context

The 120NQ045 belongs to the 120NQ...(R) series of high current Schottky rectifiers manufactured by Vishay General Semiconductor - Diodes Division. This series is designed for robust industrial applications, utilizing a unique Half-Pak module configuration. The product line emphasizes high reliability through specialized encapsulation and guard ring structures, targeting efficiency improvements in power conversion systems.

Replacement Considerations

The datasheet indicates that this module replaces two parallel DO-5 packages.