1N5994A

Single Zener Diodes Overview

The Microchip Technology 1N5994A is a 0.5 W Zener voltage regulator diode housed in an axial-lead glass DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 5.6 V with a tolerance of ±10%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 3.0 µA at 5.2 V, a dynamic impedance of 25 Ohms at the test current of 5.0 mA, and a typical temperature coefficient of +0.035 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental protection
• Internal metallurgical bonds ensuring high reliability
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in precision circuits
• Protection against voltage transients

Single Zener Diodes Procurement Notes

Verify that the specific part number suffix matches the required voltage tolerance and screening level. Confirm RoHS compliance status if applicable, as commercial versions may differ from military equivalents. Ensure the ordering documentation explicitly references the JEDEC registered type number to guarantee correct electrical parameters and package dimensions.

Single Zener Diodes Selection Notes

Select this component when a 5.6 V reference with 10% tolerance is required in a through-hole axial configuration. Consider the positive temperature coefficient for thermal stability requirements. Evaluate the power dissipation limits relative to ambient temperatures using derating curves. Verify lead length and soldering temperature constraints during assembly.

Single Zener Diodes Part Context

This device belongs to the 1N5985B-1 through 1N6031B-1 series of 0.5 watt Zener diodes. The series offers voltages from 2.4 to 200 volts with various tolerance options. These components are JEDEC registered and available in commercial and military screened variants. The 1N5994A specifically addresses the 5.6 V segment of this extensive lineup.

Single Zener Diodes Replacement Considerations

Equivalent parts include 1N5994B (5% tolerance), 1N5994C (2% tolerance), and 1N5994D (1% tolerance). Commercial RoHS-compliant versions are designated with the e3 suffix.