1N5543C/TR

Single Zener Diodes Overview

The 1N5543C/TR is a Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 25 V with a tight tolerance of ±2%. The device operates in the DO-204AH (DO-35) axial through-hole package and dissipates up to 500 mW. Key electrical characteristics include a maximum reverse leakage current of 10 nA at 22.4 V, a Zener impedance of 100 Ohms, and a forward voltage of 1.1 V at 200 mA. It supports a wide operating temperature range from -65°C to +175°C junction temperature.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a narrow ±2% tolerance on the 25 V Zener voltage.
• Engineered for high-temperature reliability with an extended junction temperature range up to 175°C.
• Utilizes a standard DO-204AH axial leaded package suitable for through-hole mounting.

Single Zener Diodes Applications

• Precision voltage reference circuits requiring stable DC levels.
• Overvoltage protection stages in sensitive electronic systems.
• Clamping applications in signal conditioning paths.

Single Zener Diodes Procurement Notes

Verify the specific suffix designation when sourcing, as it indicates tape-and-reel packaging rather than bulk. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as historical data suggests non-compliance for certain variants in this series. Ensure the procurement channel provides valid traceability documentation for quality assurance purposes.

Single Zener Diodes Selection Notes

Select this component when a highly accurate 25 V reference is required alongside robust thermal performance. The ±2% tolerance distinguishes it from standard commercial grades. Consider the axial package constraints for PCB layout and ensure the power dissipation requirements remain within the 500 mW limit under worst-case thermal conditions.

Single Zener Diodes Part Context

This part belongs to the Microchip 1N55xx series of precision Zener diodes. These components are widely used in industrial and military-grade electronics where stability and accuracy are critical. The series offers various voltage options, with the 1N5543C representing the 25 V variant in the C-tolerance grade.

Single Zener Diodes Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include 1N5543C, 1N5543D, and 1N5543D/TR from Microchip Technology. Verify that any alternative maintains the same ±2% tolerance and package type to ensure mechanical and electrical compatibility.