122NQ030

Overview

The Vishay 122NQ030 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 to 150 °C with a thermal resistance of 0.40 °C/W. Key electrical parameters include a maximum forward voltage drop of 0.49 V at 120 A, a peak surge current of 22,500 A, and a junction capacitance of 7400 pF.

Feature Summary

• Optimized for very low forward voltage drop with moderate leakage current
• Proprietary barrier technology enables reliable operation up to 150°C junction temperature
• 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 terminal configuration required for the application before procurement. The standard 122NQ030 variant has an anode lug and cathode base, whereas the 122NQ030R variant reverses this polarity. Confirm that the mounting hardware meets the specified torque requirements to ensure proper thermal contact and mechanical stability during operation.

Selection Notes

Select this component when a single unit must replace two parallel DO-5 diodes to achieve lower profile and easier mounting. Ensure the heatsinking solution can maintain the case temperature within limits defined by the 120 A rating. Verify that the circuit can handle the 22,500 A surge current capability without exceeding the non-repetitive avalanche energy limits.

Part Context

This component belongs to the 122NQ series of high-power Schottky rectifiers manufactured by Vishay General Semiconductor. It utilizes the D-67 Half-Pak module style, designed for stud or base mounting. The series is engineered for applications requiring high current density and robust thermal performance in compact form factors compared to traditional discrete packages.

Replacement Considerations

The 122NQ030R is a pin-compatible alternative with reversed terminal polarity (cathode lug, anode base). Verify that the replacement matches the required terminal orientation for the existing PCB or chassis layout.