1N4927A/TR

Single Zener Diodes Overview

The Microchip Technology 1N4927A/TR is a temperature-compensated Zener reference diode designed for high-precision voltage regulation. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device operates in the DO-35 (DO-204AH) through-hole package and dissipates up to 500 mW. Key electrical parameters include a test current of 7.5 mA, a maximum reverse leakage current of 15 µA, and a Zener impedance of 75 Ohms. It functions reliably within an operating temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Temperature compensated design ensures stable voltage reference across wide thermal variations
• Low noise characteristics suitable for precision analog circuitry
• Robust through-hole construction for reliable mounting

Single Zener Diodes Applications

• Precision voltage reference sources
• Temperature compensated oscillator circuits
• High-stability power supply regulation

Single Zener Diodes Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm RoHS compliance status as documentation may vary by production batch. Ensure the DO-35 package dimensions match the target PCB footprint requirements before finalizing procurement decisions.

Single Zener Diodes Selection Notes

Select this component when a stable 19.2 V reference is required in through-hole designs. Consider the 75 Ohm impedance and 500 mW power rating for thermal management. Verify that the ±5% voltage tolerance meets the system's accuracy specifications compared to tighter tolerance alternatives.

Single Zener Diodes Part Context

This part belongs to Microchip's legacy 1N series of temperature-compensated Zener diodes. These components are engineered to provide superior stability compared to standard Zener diodes, particularly in applications where ambient temperature fluctuations could otherwise degrade reference voltage accuracy.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 19.2 V temperature-compensated Zener diodes from manufacturers such as Microsemi or ON Semiconductor. Ensure replacement parts maintain the same DO-35 package and similar impedance characteristics to preserve circuit performance.

Single Zener Diodes FAQ

What is the typical Zener impedance for the 1N4927A/TR?

The specified Zener impedance is 75 Ohms at the test current of 7.5 mA.

Does the 1N4927A/TR offer low-noise performance?

Yes, it is classified as a low-noise temperature-compensated Zener reference diode.