181NQ035

Overview

The Vishay 181NQ035 is a high-current Schottky rectifier module in the D-67 Half-Pak package. It features a maximum average forward current of 180 A and a maximum repetitive peak reverse voltage of 35 V. The device supports junction temperatures up to 175°C, with a maximum forward voltage drop of 0.66 V at 180 A and 25°C. Key electrical parameters include a maximum reverse leakage current of 15 mA at 25°C, a junction capacitance of 7800 pF, and a thermal resistance from junction to case of 0.30 °C/W.

Feature Summary

• Optimized for very low forward voltage drop with moderate leakage current
• Reliable operation up to 175°C junction temperature using proprietary barrier technology
• High purity, high temperature epoxy encapsulation for enhanced mechanical strength and moisture resistance
• Guard ring design provides enhanced ruggedness and long-term reliability

Applications

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

Procurement Notes

Verify the specific suffix (R) if required, as it indicates reversed terminal polarity compared to the standard version. Confirm that the component is sourced from authorized distributors to ensure authenticity. Check for RoHS compliance status if environmental regulations apply to the assembly. Ensure mounting hardware meets the specified torque requirements for the lug and base terminals.

Selection Notes

Select this module when replacing three parallel DO-5 diodes to achieve a lower profile and easier mounting. Consider the 0.30 °C/W junction-to-case thermal resistance for heatsink calculations. Verify that the system can accommodate the 180 A average forward current rating under the expected duty cycle and case temperature conditions.

Part Context

This component belongs to the 181NQ series of high-current Schottky rectifiers manufactured by Vishay General Semiconductor - Diodes Division. The series utilizes unique high-power Half-Pak modules designed for industrial-level applications. The 181NQ035 specifically offers a 35 V reverse voltage rating within this family.

Replacement Considerations

The datasheet states the module replaces three parallel DO-5 diodes. No specific substitute part numbers are provided in the documentation.