1N4728A-TR

Overview

The Vishay 1N4728A-TR is a silicon planar power Zener diode with a nominal voltage of 3.3 V and a maximum power dissipation of 1.3 W at thermal equilibrium. It features a standard tolerance of ±5% and operates within a junction temperature range of -65 °C to +175 °C. The device utilizes a DO-41 axial through-hole package, weighs approximately 310 mg, and complies with UL 94 V-0 flammability standards. Packaged in reels of 5000 units for automated assembly, it includes a test current of 76 mA, a reverse leakage current of 100 µA, and a dynamic resistance of 10 Ω.

Feature Summary

• Silicon planar construction designed for high-power stabilizing and clipping circuits
• Glass passivated junction providing reliable performance across extended temperature ranges
• Standardized ±5% Zener voltage tolerance ensuring consistent regulation characteristics

Applications

• Voltage stabilization in electronic circuits
• Signal clipping applications requiring defined voltage thresholds

Procurement Notes

Verify the specific ordering code suffix against the manufacturer's documentation to confirm reel specifications and minimum order quantities. Ensure that the component meets RoHS compliance requirements as defined by the manufacturer's material categorization guidelines. Cross-reference the datasheet revision date to validate the accuracy of electrical parameters before final procurement decisions.

Selection Notes

Select this component when a 3.3 V reference point is required in through-hole designs. Evaluate the 1.3 W power dissipation capability relative to ambient operating temperatures using the provided derating curves. Confirm that the DO-41 package dimensions align with the target printed circuit board layout constraints.

Part Context

This part belongs to the Vishay 1N4728A to 1N4761A series of single Zener diodes. The series covers a broad voltage spectrum from 3.3 V to 75 V, sharing common physical packaging and general manufacturing processes. The 1N4728A represents the lowest voltage option within this specific standardized lineup.

Replacement Considerations

Consult official substitution lists or equivalent product databases to identify compatible alternatives. Verify that any replacement maintains identical voltage ratings, power dissipation limits, and package compatibility.