1N5249

Single Zener Diodes Overview

The SMC Diode Solutions 1N5249 is a single silicon planar Zener diode housed in a DO-35 axial leaded glass package. It provides a nominal Zener voltage of 19 V with a maximum power dissipation of 500 mW. The device features a standard tolerance of ±10% and operates within a junction temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA at 14 V, a forward voltage drop of 1.2 V at 200 mA, and a maximum Zener impedance of 23 Ohms.

Single Zener Diodes Feature Summary

• Utilizes planar die construction for enhanced reliability and consistent performance under varying thermal conditions.
• Designed specifically for automated assembly processes, ensuring compatibility with high-volume manufacturing workflows.
• Complies with EU RoHS directives, supporting environmentally conscious production standards.

Single Zener Diodes Applications

• Voltage regulation in low-power electronic circuits
• Overvoltage protection for sensitive semiconductor components
• Reference voltage sources in analog signal processing

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N5249 part number is produced by multiple vendors including onsemi, Microchip, and SMC Diode Solutions. Confirm that the required tolerance matches your design needs, as standard versions typically offer ±10%, while tighter tolerances like ±5% may require specific suffixes such as 'B'. Ensure the DO-35 package dimensions align with your PCB footprint requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring a stable 19 V reference or clamp in through-hole designs. The 500 mW power rating suits low-current regulation tasks. Consider the ±10% tolerance for general-purpose use; if higher precision is necessary, identify variants with tighter specifications. Verify the operating temperature range meets the environmental constraints of the target system.

Single Zener Diodes Part Context

The 1N5249 belongs to the broader 1N52xx series of 500 mW Zener diodes, which covers a wide voltage range from 2.4 V to 75 V. This series is widely adopted in industrial and consumer electronics for basic voltage stabilization. The DO-35 glass package is a standard form factor for axial-leaded diodes, facilitating easy integration into legacy and modern printed circuit board layouts.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N5249B (±5% tolerance) from various manufacturers. Cross-brand replacements such as those from Microchip Technology or Central Semiconductor are functionally equivalent. Verify that any alternative maintains the same DO-35 package and 500 mW power rating to ensure mechanical and thermal compatibility.