1N4489US

Single Zener Diodes Overview

The Microchip Technology 1N4489US is a surface mount Zener voltage regulator diode with a nominal breakdown voltage of 100 V. It operates within a junction temperature range of -65 °C to +175 °C and features a steady-state power dissipation rating of 1.5 W at 25 °C ambient temperature. The device exhibits a maximum dynamic impedance of 250 Ohms at the test current of 2.5 mA, with a maximum reverse leakage current of 0.25 µA at 100 V. It utilizes a hermetically sealed voidless glass D-5A MELF package.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/406 standards for military applications.
• Triple-layer passivation provides robust protection against environmental stressors.

Single Zener Diodes Applications

• High-reliability voltage regulation circuits where failure cannot be tolerated.
• Military and aerospace electronic systems requiring radiation hardness.
• Voltage reference applications in extreme temperature environments.

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as these designations affect qualification standards. Confirm RoHS compliance status if applicable, noting that compliant versions are available only on commercial grades. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 100 V Zener voltage is required in a surface mount form factor. Consider the 1.5 W power dissipation capability and the wide operating temperature range up to +175 °C. Evaluate the dynamic impedance and leakage current specifications against circuit sensitivity requirements. Verify that the D-5A MELF package dimensions fit the PCB layout constraints.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of industry-recognized 1.5 Watt glass Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series offers extensive voltage selections from 3.3 to 200 Volts with standard 5% tolerance options.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4460US–1N4496US series that share identical package and electrical characteristics. Cross-reference specific reliability levels such as JAN, JANTX, JANTXV, or JANS to ensure equivalent qualification standards are met for the target application environment.

Single Zener Diodes FAQ

What is the thermal resistance from junction to end cap?

The thermal resistance from junction to end cap is 20 °C/W.

Is the 1N4489US sensitive to electrostatic discharge?

No, the device is non-sensitive to ESD per MIL-STD-750 method 1020.