1N4739A-TR

Overview

The Vishay 1N4739A-TR is a silicon planar power Zener diode in the DO-41 (DO-204AL) axial through-hole package. It provides a nominal Zener voltage of 9.1 V with a standard tolerance of ±5%. The device operates at a test current of 28 mA and features a maximum dynamic resistance of 5 Ω. It supports a peak power dissipation of 1300 mW under specific thermal conditions, with a junction temperature rating up to 175 °C.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed for high-power stabilization and clipping applications
• Standardized voltage tolerance ensures consistent performance

Applications

• Voltage stabilization circuits
• Signal clipping applications

Procurement Notes

Verify that the ordering code includes the -TR suffix to confirm taped reel packaging. Confirm compliance requirements against the material categorization document. Validate thermal equilibrium conditions during testing to ensure accurate parameter measurement.

Selection Notes

Select this component when a 9.1 V reference is required in an axial package. Ensure the application can accommodate the specified thermal resistance and power dissipation limits. Verify lead temperature maintenance for accurate power ratings.

Part Context

This part belongs to the 1N4728A to 1N4761A series of Zener diodes manufactured by Vishay Semiconductors. The series covers a wide range of voltages from 3.3 V to 75 V, all sharing similar planar construction and DO-41 packaging standards.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4739A equivalents. Verify pinout compatibility and thermal characteristics match the original design requirements.