1N5278

Single Zener Diodes Overview

The Microchip Technology 1N5278 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 170 V with a power dissipation rating of 500 mW. The component utilizes a DO-35 axial through-hole package and maintains a tight voltage tolerance of ±1%. Electrical characteristics include a maximum reverse leakage current of 100 nA at 123 V and a Zener impedance of 1900 Ohms. It operates within a temperature range of -65°C to +175°C, ensuring stability in demanding environments.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a 1% tolerance on the 170 V Zener voltage.
• Engineered for high-temperature reliability with an operating range extending to +175°C.
• Constructed in a glass-passivated DO-35 axial leaded package for robust through-hole mounting.

Single Zener Diodes Applications

• Precision voltage reference circuits requiring stable high-voltage regulation.
• Overvoltage protection stages in industrial control systems.
• Clamping applications in high-voltage signal processing paths.

Single Zener Diodes Procurement Notes

Verify the specific suffix code (e.g., B, D) against the official datasheet to confirm exact tolerance and electrical parameters, as variations exist within the family. Ensure the procurement specification matches the required DO-35 package style and thermal ratings. Cross-reference manufacturer part numbers to avoid confusion with similar high-voltage Zener variants that may differ in impedance or leakage specifications.

Single Zener Diodes Selection Notes

Select this component when a stable 170 V reference is needed with strict tolerance requirements. The 500 mW power rating suits low-current regulation tasks. Verify that the circuit current remains within limits to prevent exceeding the power dissipation threshold. Consider the 1900 Ohm impedance value for dynamic load analysis to ensure adequate regulation performance under varying load conditions.

Single Zener Diodes Part Context

This device belongs to the standard 1N52xx series of glass-passivated Zener diodes manufactured by Microchip Technology. These components are widely used in general-purpose electronics for voltage stabilization. The 1N5278 specifically addresses the need for higher voltage regulation points compared to lower-voltage counterparts in the same series, maintaining consistent manufacturing quality and reliability standards across the product line.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the 1N5278B and 1N5278D from various manufacturers, provided they match the 170 V Zener voltage, 500 mW power rating, and DO-35 package dimensions. Verify that replacement parts meet the same ±1% tolerance and thermal operating range specifications to ensure circuit compatibility.