189NQ135

Overview

The Vishay 189NQ135 is a high-current Schottky rectifier module in the HALF PAK case style. It features a maximum DC reverse voltage of 135 V and an average forward current rating of 180 A at a case temperature of 110 °C. The device supports junction temperatures up to 175 °C and offers a peak surge current capability of 15,000 A for a 5 µs sine pulse. Key electrical parameters include a maximum forward voltage drop of 1.07 V at 180 A and a maximum reverse leakage current of 4.5 mA at 25 °C.

Feature Summary

• Optimized for low reverse leakage at elevated temperatures with proprietary barrier technology
• Unique high power Half-Pak module design replacing three parallel DO-5 diodes
• High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance
• Guard ring structure for enhanced ruggedness and long term reliability

Applications

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

Procurement Notes

Verify the specific suffix code against the manufacturer datasheet to confirm exact voltage ratings and package variations. Confirm thermal interface requirements and mounting torque specifications during integration. Ensure compliance with RoHS directives if applicable, as older manufacturing runs may differ. Validate supplier authenticity through authorized distribution channels.

Selection Notes

Select this component for applications requiring high current handling and robust thermal performance. The 189NQ135 is suitable where space constraints favor a single module over multiple parallel discrete diodes. Consider the 175 °C junction temperature capability for high-temperature environments. Evaluate the 0.30 °C/W thermal resistance for heatsink design calculations.

Part Context

This part belongs to the 189NQ series of high current Schottky rectifiers manufactured by Vishay General Semiconductor - Diodes Division. The series includes variants with different reverse voltage ratings, such as the 189NQ150. These modules are designed to replace traditional parallel DO-5 configurations, offering a lower profile and easier mounting solution for industrial power electronics.

Replacement Considerations

The datasheet indicates that this module replaces three parallel DO-5 diodes. No specific substitute part numbers are provided in the source material.