1N4731A-TR

Overview

The Vishay General Semiconductor - Diodes Division 1N4731A-TR is a silicon planar power Zener diode housed in the DO-41 (DO-204AL) axial through-hole package. It provides a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%. The device operates at a test current of 58 mA and features a maximum power dissipation of 1.3 W. Electrical characteristics include a reverse leakage current of 10 µA at 1 V, a dynamic resistance of 9 Ω, and a forward voltage of 1.2 V at 200 mA. It supports a junction temperature up to 175 °C and a storage range from -65 °C to +175 °C.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed for high-power stabilization and clipping applications
• Provides standard Zener voltage tolerance of ±5%
• Features low reverse leakage current for stable performance

Applications

• Voltage stabilization circuits
• Signal clipping applications
• Power supply reference regulation

Procurement Notes

Verify the specific ordering code suffix against official Vishay documentation to confirm packaging format and reel specifications. Ensure that the selected variant meets all required environmental compliance standards and thermal operating limits for the intended application environment before finalizing procurement.

Selection Notes

Select this component when a 4.3 V reference with ±5% tolerance is required in a through-hole configuration. Confirm that the 1.3 W power dissipation rating and 175 °C junction temperature capability align with the system's thermal management design and ambient operating conditions.

Part Context

This part belongs to the 1N4728A to 1N4761A series of single Zener diodes manufactured by Vishay Semiconductors. The series covers a wide voltage selection range from 3.3 V to 75 V, offering standardized electrical characteristics across multiple manufacturers utilizing the same JEDEC registration numbering system.

Replacement Considerations

Direct substitutes within the same series include other manufacturers' versions of the 1N4731A designation. Verify that any replacement maintains identical package dimensions, pinout orientation, and electrical parameters such as Zener voltage and power dissipation ratings.