1N5278/TR

Single Zener Diodes Overview

The Microchip Technology 1N5278/TR is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 170 V with a tolerance of 10%. The device operates in the DO-35 (DO-204AH) axial through-hole package and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 1.7 kOhms at a test current of 100 µA, and a forward voltage of 1.5 V. It supports a wide operating temperature range from -65 °C to +175 °C junction temperature.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at high potential levels using a single unidirectional configuration.
• Engineered for robust performance across extreme thermal environments suitable for demanding industrial conditions.
• Constructed with hermetic sealing capabilities within a glass-encapsulated axial leaded structure.

Single Zener Diodes Applications

• High-voltage reference circuits requiring precise potential maintenance.
• Overvoltage protection stages in sensitive electronic instrumentation.
• Clamping applications in industrial control systems exposed to harsh thermal conditions.

Single Zener Diodes Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact packaging and testing standards. Ensure that the procurement channel sources components directly from authorized distributors or the manufacturer to guarantee authenticity. Cross-reference the part number with the latest datasheet revisions to validate compliance with current environmental regulations and material specifications before finalizing acquisition.

Single Zener Diodes Selection Notes

Select this component when circuit designs require a high-voltage regulation point near 170 V with moderate precision. The DO-35 package is appropriate for through-hole mounting processes where space constraints are not critical. Consider the 10% voltage tolerance and 1.7 kOhm impedance values to ensure compatibility with the target load requirements and noise sensitivity profiles of the application.

Single Zener Diodes Part Context

This component belongs to the standard 1N52xx series of Zener diodes manufactured by Microchip Technology. The series offers a broad spectrum of voltage ratings for general-purpose voltage regulation tasks. The 1N5278 variant specifically addresses high-voltage needs within the axial glass-encapsulated form factor, maintaining consistency with established industry pinouts and mechanical dimensions for legacy system integration.

Single Zener Diodes Replacement Considerations

Consult official substitution guides for compatible equivalents such as the MX1N5278A-1TR. Verify that alternative parts match the 170 V rating, 500 mW power dissipation, and DO-35 package dimensions to ensure seamless physical and electrical integration without modifying the existing circuit board layout.