1N4746A-TR

Overview

The Vishay 1N4746A-TR is a silicon planar power Zener diode with an 18 V nominal voltage and ±5% tolerance. It operates in the DO-41 (DO-204AL) through-hole package, weighing approximately 310 mg. The device provides a maximum power dissipation of 1.3 W at thermal equilibrium and withstands junction temperatures up to 175 °C. Electrical characteristics include a test current of 14 mA, a reverse leakage current of 5 µA at 13.7 V, and a dynamic impedance of 20 Ω.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed for high-power stabilization and clipping applications
• Features standard Zener voltage tolerance of ±5%

Applications

• Voltage stabilization circuits
• High-power clipping circuits

Procurement Notes

Verify that the ordering suffix -TR corresponds to the taped reel configuration containing 5000 units per reel. Confirm compliance requirements against the material categorization document provided by Vishay. Ensure lead temperature maintenance during soldering to preserve component integrity within specified thermal limits.

Selection Notes

Select this component when a stable 18 V reference is required in through-hole designs. The 1.3 W power rating supports higher energy dissipation compared to lower-wattage variants. Verify that the operating ambient temperature remains within the -65 °C to +175 °C range to ensure reliable performance under varying environmental conditions.

Part Context

This part belongs to the 1N4728A to 1N4761A series of Zener diodes manufactured by Vishay Semiconductors. The series covers a broad voltage range from 3.3 V to 75 V, providing standardized options for various circuit protection and regulation needs across industrial and commercial electronics.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4746A equivalents in the DO-41 package. Ensure replacement parts match the 18 V nominal voltage, 1.3 W power dissipation, and ±5% tolerance specifications to maintain circuit functionality.