1N4489

Single Zener Diodes Overview

The Microchip Technology 1N4489 is a 1.5-watt glass Zener diode with a nominal voltage of 100 V and a maximum dynamic impedance of 250 Ohms at a test current of 2.5 mA. It operates within a junction temperature range of -65°C to +175°C and features a DO-41 axial lead package. The device is hermetically sealed using void-less glass construction with internal metallurgical bonds, ensuring robust performance in high-reliability environments.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass package with internal metallurgical bonds for extreme robustness
• Military qualification available per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels
• Inherently radiation hard as described in Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability applications where failure cannot be tolerated
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify the specific reliability level suffix (JAN, JANTX, JANTXV, or JANS) required for your application, as these denote different qualification tiers under MIL-PRF-19500/406. Confirm RoHS compliance status, noting that compliant versions are typically restricted to commercial grade only. Ensure the ordering part number matches the exact tolerance and package requirements specified in your design documentation.

Single Zener Diodes Selection Notes

Select this component for applications requiring a 100 V Zener reference with high thermal stability and radiation hardness. The DO-41 package supports flexible axial-lead mounting. Consider tighter tolerance variants if standard 5% accuracy is insufficient, as 1% and 2% options exist within this series. Verify power dissipation limits against ambient temperature conditions using the provided derating curves.

Single Zener Diodes Part Context

This device belongs to the 1N4460–1N4496 series of industry-recognized 1.5-watt Zener voltage regulators. The series offers selections from 3.3 to 200 volts with standard 5% tolerance, alongside tighter 1% and 2% options. These components utilize triple-layer passivation and are designed for critical systems demanding long-term reliability and environmental resilience.

Single Zener Diodes Replacement Considerations

Equivalent parts include other military-grade 100 V Zener diodes meeting MIL-PRF-19500/406 specifications. Surface mount equivalents are available in the 1N4460US–1N4496US series. Verify pinout compatibility and thermal characteristics when substituting.