1N3157UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N3157UR-1/TR is a temperature-compensated Zener reference diode with an 8.4 V nominal voltage and a maximum temperature coefficient of 0.001 %/°C. It operates at a test current of 10 mA, features a maximum dynamic impedance of 15 Ω, and has a reverse leakage current of 10 µA at 5.5 V. The device is housed in a hermetically sealed DO-7 (DO-204AA) glass axial-lead package and supports tape-and-reel packaging.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad temperature range for stable voltage references
• Features internal metallurgical bonds within a hermetically sealed glass case
• Offers flexible axial-lead mounting terminals suitable for various circuit designs

Single Zener Diodes Applications

• Instrumentation requiring stable voltage references
• Circuit designs demanding minimal voltage changes over temperature
• Temperature compensated reference applications

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements for military or commercial variants when ordering. Confirm that the TR suffix indicates tape-and-reel packaging per EIA-296 standards. Ensure compatibility with MIL-STD-750 soldering methods if applicable. Check for RoHS compliance status as it varies by suffix. Consult official documentation for exact tolerance designations.

Single Zener Diodes Selection Notes

Select this component for applications requiring high thermal stability near the 8.4 V nominal point. Consider the 0.001 %/°C temperature coefficient for precision environments. Evaluate the 15 Ω impedance against load regulation needs. Verify operating current constraints to maintain optimal voltage-temperature stability below 90 mW dissipation.

Single Zener Diodes Part Context

This part belongs to the JEDEC registered 1N3154 through 1N3157A series of Zero-TC Reference Diodes. The series provides selection of 8.4 V nominal voltages with varying temperature coefficients down to 0.001 %/°C. The -1 suffix typically denotes military qualification options under MIL-PRF-19500/158.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other parts from the 1N3154 through 1N3157A series with matching temperature coefficients. JANS equivalents are available via SCD. Radiation-hardened versions exist with the RH prefix, such as RH3157A.

Single Zener Diodes FAQ

How does operating current affect the temperature coefficient?

Operating at currents other than 10.0 mA alters the temperature coefficient. Graphs in the datasheet allow estimation of these changes based on the specific operating current.

What is the polarity configuration for operation?

The reference diode must be operated with the banded end positive with respect to the opposite end.