1N4489US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4489US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 100.0 V and a maximum power dissipation of 1.5 W at 25°C ambient temperature. It operates within a junction and storage temperature range of -65°C to +175°C. The device features a test current (IZT) of 2.5 mA, a maximum dynamic impedance (ZZT) of 250 Ohms, and a maximum reverse leakage current of 0.25 µA at 90.0 V. It utilizes an A (D-5A) MELF package.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction using internal metallurgical bonds for robust reliability.
• 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

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

Single Zener Diodes Procurement Notes

Verify the specific military qualification level required for your application, as the base part number may correspond to commercial grade while suffixes indicate JAN, JANTX, JANTXV, or JANS ratings. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are typically restricted to commercial grades. Ensure the tape and reel packaging meets EIA-481-B standards for automated assembly processes.

Single Zener Diodes Selection Notes

Select this component when a 100 V Zener reference is needed in a surface mount form factor requiring high thermal stability up to 175°C. Consider the 250 Ohm dynamic impedance for noise sensitivity requirements. Evaluate the 1.5 W steady-state power dissipation against your thermal management capabilities. Verify that the D-5A MELF footprint matches your PCB layout constraints.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of 1.5 Watt Glass Zener Diodes. These components serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series offers Zener selections ranging from 3.3 to 200 volts with standard 5% tolerance, providing a comprehensive solution for voltage regulation needs in compact electronic assemblies.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N4489CUS, JAN1N4489DUS, JANTX1N4489CUS, JANTX1N4489DUS, JANTXV1N4489CUS, and JANTXV1N4489DUS.

Single Zener Diodes FAQ

What is the maximum continuous Zener current for the 1N4489US?

The maximum continuous current (IZM) is 14 mA.

Is the 1N4489US hermetically sealed?

Yes, it features a void-less hermetically sealed glass package with tungsten slugs.