18TQ050

Overview

The 18TQ050 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features a maximum DC reverse voltage (Vr) of 50 V and an average rectified current (Io) of 18 A per diode. The device utilizes a TO-220AC package with a tab for mounting. Key electrical characteristics include a forward voltage (Vf) typical value and a low reverse leakage current. The component is designed for surface or through-hole applications, offering high efficiency due to its Schottky technology which minimizes power loss during switching operations.

Feature Summary

• Schottky barrier construction for low forward voltage drop
• High surge current capability
• Lead-free and RoHS compliant manufacturing

Applications

• DC-to-DC converters
• Free-wheeling diodes in inductive circuits
• Power supply rectification

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as availability may vary between distributors. Confirm that the procurement channel provides original manufacturer documentation to ensure authenticity. Check for any updated environmental compliance certificates if required for your specific regulatory jurisdiction. Ensure the storage conditions align with semiconductor handling standards to prevent moisture sensitivity issues before assembly.

Selection Notes

Select this component for applications requiring moderate voltage blocking up to 50 V and high current handling around 18 A. The TO-220AC package facilitates thermal management through direct mounting to heatsinks. Consider the reverse recovery characteristics inherent to Schottky diodes for high-frequency switching environments where standard PN junctions would exhibit excessive losses. Evaluate thermal resistance requirements based on the expected ambient temperature and load profile.

Part Context

This part belongs to Vishay's discrete diode portfolio, specifically within the Schottky rectifier category. It is designed to replace older generations of silicon rectifiers in power conversion circuits. The TO-220AC form factor is widely used in industrial and consumer electronics for robust mechanical mounting and efficient heat dissipation compared to smaller surface-mount alternatives.

Replacement Considerations

Check for equivalent parts from other manufacturers such as ON Semiconductor or STMicroelectronics with matching 50V/18A ratings and TO-220AC packages. Verify pinout compatibility and thermal performance metrics before substitution. Note that some sources indicate this specific part number may be obsolete; confirm active status with suppliers.