1N5249B-TR

Single Zener Diodes Overview

The Vishay General Semiconductor - Diodes Division 1N5249B-TR is a silicon planar power Zener diode housed in the DO-35 (DO-204AH) axial leaded package. It provides a nominal Zener voltage of 19 V with a standard tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and operates within a junction temperature range up to 175 °C. Electrical characteristics include a reverse leakage current of 0.1 µA at 14 V, a dynamic resistance of 23 Ω at the test current of 6.6 mA, and a typical temperature coefficient of 0.086 %/K.

Single Zener Diodes Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Features a glass encapsulated DO-35 axial leaded package
• Designed for high thermal stability with a junction temperature rating of 175 °C

Single Zener Diodes Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify that the ordering code includes the TR suffix to confirm taped and reeled packaging. Ensure the B suffix is present to match the specified ±5% voltage tolerance. Confirm compliance with RoHS directives and check material categorization documentation for specific environmental requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 19 V reference is required in an axial through-hole configuration. Consider the 500 mW power limit and the specific test current of 6.6 mA during circuit design. Evaluate the dynamic resistance and temperature coefficient against the precision requirements of the target application.

Single Zener Diodes Part Context

This part belongs to the 1N5221 to 1N5267 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series covers a wide Zener voltage range from 2.4 V to 75 V. The 1N5249 variant specifically targets the 19 V segment of this extensive lineup.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering equivalent 19 V Zener diodes in the DO-35 package. Verify that alternative parts meet the same 500 mW power dissipation and ±5% tolerance specifications.