1N4749A-TAP

Overview

The Vishay 1N4749A-TAP is a silicon planar power Zener diode with a nominal voltage of 24 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 up to 175 °C. The device utilizes a DO-41 (DO-204AL) through-hole package, weighs approximately 310 mg, and has a dynamic resistance of 25 Ω at the test current of 10.5 mA.

Feature Summary

• Silicon planar construction for high-power stabilization and clipping applications
• Hermetically sealed glass package ensuring environmental protection
• Standardized voltage tolerance of ±5% for consistent performance

Applications

• Voltage stabilization circuits
• High-power clipping circuits

Procurement Notes

Verify the specific ordering code suffix matches the required packaging format, as the -TAP designation indicates an ammo pack configuration. Confirm compliance requirements against the material categorization definitions provided in the official documentation. Ensure that lead temperatures during soldering do not exceed the specified peak limits to maintain component integrity.

Selection Notes

Select this component when a 24 V reference with 1.3 W power handling capability is required in a through-hole assembly. Consider the 25 Ω dynamic impedance and 5 µA leakage current specifications for circuit stability. Verify that the operating ambient temperature remains within the rated range to ensure the full power dissipation rating is maintained without derating.

Part Context

This part belongs to the 1N4728A to 1N4761A series of low-voltage regulator diodes manufactured by Vishay Semiconductors. The series covers nominal working voltages from 3.3 V to 75 V in hermetically sealed small glass packages. The 1N4749A specifically addresses the 24 V segment of this standardized product line.

Replacement Considerations

Cross-reference with other manufacturers' 1N4749A equivalents to verify pinout compatibility and electrical parameter alignment. Ensure substitute components meet the same DO-41 package dimensions and thermal resistance characteristics for direct board replacement.