18TQ045STRL

Overview

The Vishay 18TQ045STRL is a Schottky rectifier in the 18TQ...S series, housed in a D2PAK (TO-263AB) surface-mount package. It features an average forward current rating of 18 A and a maximum repetitive peak reverse voltage of 45 V. The device supports junction temperatures up to 175 °C and utilizes proprietary barrier technology for low reverse leakage at high temperatures. Key electrical characteristics include a maximum forward voltage drop of 0.53 V at 18 A and 125 °C, and a non-repetitive surge current capability of 1800 A.

Feature Summary

• Optimized for low reverse leakage current at elevated temperatures using proprietary barrier technology
• Designed with a guard ring structure to enhance ruggedness and long-term reliability
• Qualified for automotive applications according to Q101 standards
• Encapsulated in high-purity epoxy for enhanced mechanical strength and moisture resistance

Applications

• Switching power supplies
• DC-DC converters
• Freewheeling diodes
• Reverse battery protection circuits

Procurement Notes

Verify that the ordering suffix 'TRL' corresponds to the tape and reel configuration with left orientation as specified in the datasheet. Confirm the specific voltage rating matches the '045' designation for 45 V operation. Ensure the component meets lead-free requirements if applicable, noting that standard production versions may differ from PbF variants. Cross-reference the document number 93950 for the most current technical specifications.

Selection Notes

Select this component for applications requiring high-frequency operation and low forward voltage drop. Consider the thermal resistance of 1.50 °C/W when designing heatsinking solutions. Evaluate the 1800 A surge current capability against potential inrush conditions. Ensure the operating junction temperature remains within the -55 °C to 175 °C range for reliable performance.

Part Context

This part belongs to the Vishay 18TQ Schottky rectifier series, which includes variants with different voltage ratings such as 35 V and 40 V. All members share the same 18 A current rating and D2PAK package style. The series is engineered for general-purpose power conversion tasks where efficiency and thermal stability are critical design factors.

Replacement Considerations

Direct substitutes within the same series include the 18TQ035STRL and 18TQ040STRL, which offer identical current and packaging specifications but lower reverse voltage ratings of 35 V and 40 V respectively. Verify that the system's peak reverse voltage requirements do not exceed these alternative ratings.

FAQ

What is the maximum junction temperature for the 18TQ045STRL?

The maximum junction temperature (TJ) for this device is 175 °C.

Does the 18TQ045STRL meet automotive qualification standards?

Yes, the device is designed and qualified for AEC-Q101 level standards.

What is the typical series inductance of the D2PAK package?

The typical series inductance is 8.0 nH, measured lead-to-lead 5 mm from the package body.