18TQ035S

Overview

The Vishay 18TQ035S is a Schottky rectifier in the D2PAK package with an average forward current of 18 A and a maximum DC reverse voltage of 35 V. It operates at junction temperatures up to 175 °C, featuring a typical forward voltage drop of 0.53 V at 18 A and 125 °C. The device supports peak surge currents of 1800 A for 5 µs pulses and includes guard ring technology for enhanced ruggedness.

Feature Summary

• Optimized for low reverse leakage current at elevated temperatures
• Proprietary barrier technology enables reliable operation up to 175 °C junction temperature
• Guard ring design provides enhanced ruggedness and long-term reliability
• Qualified for automotive Q101 level standards

Applications

• Switching power supplies
• Converters
• Freewheeling diodes
• Reverse battery protection

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm datasheet revision 25-Jun-08 matches physical markings. Ensure thermal management meets the specified 1.50 °C/W junction-to-case resistance. Check for lead-free (PbF) compliance if required by assembly specifications.

Selection Notes

Select this component when high-frequency switching and low forward voltage drop are critical. The 35 V rating suits low-voltage DC-DC conversion. Verify that the D2PAK footprint accommodates the required mounting torque between 6 and 12 kgf·cm. Consider thermal resistance limits for continuous 18 A operation at target case temperatures.

Part Context

Part of the 18TQ...S Schottky rectifier series from Vishay High Power Products. Includes variants with 40 V and 45 V ratings (18TQ040S, 18TQ045S). Manufactured using silicon technology with epoxy encapsulation for moisture resistance and mechanical strength.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided source material.