1N4746A-TAP

Overview

The Vishay 1N4746A-TAP is a silicon planar power Zener diode in the 1N4728A to 1N4761A series, housed in an axial DO-41 package. It provides a nominal Zener voltage of 18 V with a standard tolerance of ±5 %. The device operates at a test current of 14 mA and features a maximum reverse leakage current of 5 μA at 13.7 V. Dynamic impedance is specified at 20 Ω. It supports a peak power dissipation of 1300 mW under short-pulse conditions and functions within a junction temperature range up to 175 °C.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed for high-power stabilization and clipping applications
• Features a glass DO-41 axial leaded package

Applications

• Voltage stabilization circuits
• Signal clipping circuits

Procurement Notes

Verify that the specific ordering code matches the -TAP suffix to confirm the ammpack tape configuration rather than reel packaging. Confirm compliance documentation availability via official Vishay channels. Validate thermal equilibrium measurement conditions against application requirements before finalizing procurement specifications.

Selection Notes

Select this component when a 18 V reference with ±5 % accuracy is required in through-hole designs. Ensure the circuit can accommodate the 14 mA test current for proper regulation. Verify that the 1300 mW peak power rating aligns with transient load conditions, as continuous dissipation is lower.

Part Context

This part belongs to the Vishay 1N47xxA series of general-purpose Zener diodes. The series spans voltages from 3.3 V to 75 V, sharing common package dimensions and manufacturing processes. The -TAP suffix specifically denotes the 5000-unit ammpack tape format for automated assembly.

Replacement Considerations

Cross-reference with other manufacturers' 1N4746A equivalents. Verify that substitute parts meet the same 18 V nominal voltage, 5 % tolerance, and DO-41 package constraints.