1N4739A-T

Overview

The Vishay General Semiconductor - Diodes Division 1N4739A-T 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 9.1 V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 1300 mW and operates within a junction temperature range up to 175 °C. Electrical characteristics include a test current of 28 mA, a reverse leakage current of 10 µA at 7 V, and a dynamic resistance of 700 Ω.

Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Designed for high-power stabilization and clipping applications
• Features low reverse leakage current and stable breakdown impedance

Applications

• Voltage stabilization circuits
• High-power clipping circuits

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, such as taped units per reel or ammopack configurations. Confirm compliance with RoHS directives and material categorization standards before finalizing procurement. Ensure the component meets the necessary thermal equilibrium conditions specified in the datasheet for accurate performance validation during integration.

Selection Notes

Select this component when a 9.1 V reference point is required in through-hole designs. The DO-41 package accommodates higher power dissipation compared to smaller surface-mount alternatives. Verify that the circuit's surge current requirements remain below the specified maximum limits to ensure long-term reliability under transient conditions.

Part Context

This part belongs to the 1N4728A to 1N4761A series of voltage regulator diodes manufactured by Vishay Semiconductors. The series covers a broad range of Zener voltages from 3.3 V to 75 V, providing standardized options for various power supply and protection applications across industrial and consumer electronics sectors.

Replacement Considerations

Cross-reference with other manufacturers' 1N4739A equivalents to verify pinout compatibility and thermal resistance values. Ensure substitute components meet the same ±5% voltage tolerance and 1300 mW power dissipation ratings to maintain circuit integrity without redesigning the PCB layout.