1N5539BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5539BUR-1 is a low voltage avalanche Zener diode with a nominal breakdown voltage of 19 V. It operates within a temperature range of -65°C to +175°C and dissipates up to 0.5 W. The device features a DO-213AA MELF package, a maximum reverse leakage current of 10 µA at 16 V, and a dynamic impedance of 100 Ω at the test current of 1 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount construction
• Qualified per MIL-PRF-19500/437 standards
• Internal metallurgical bond option
• Inherently radiation hard

Single Zener Diodes Applications

• Satellite communications terminals
• Defense aerospace systems
• Voltage regulation in broad operating ranges

Single Zener Diodes Procurement Notes

Verify that the specific part number suffix matches the required military qualification level (JAN, JANTX, or JANTXV) as indicated in the datasheet nomenclature. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from qualified levels. Ensure ordering specifications align with the exact tolerance requirements defined by the B suffix.

Single Zener Diodes Selection Notes

Select this component for applications requiring hermetic sealing and radiation hardness in a compact surface mount form factor. The 19 V nominal rating suits circuits needing precise regulation near this threshold. Consider the 100 Ohm dynamic impedance for noise-sensitive designs and verify thermal derating curves against expected ambient temperatures.

Single Zener Diodes Part Context

This device belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of 0.5 watt glass surface mount Zener voltage regulators. The series provides a selection from 3.3 to 33 volts with various tolerance options. These devices are designed for high-reliability environments where standard plastic packages are unsuitable.

Single Zener Diodes Replacement Considerations

Consult the manufacturer's documentation for direct equivalents within the 1N55xx series. Verify pinout compatibility and thermal resistance characteristics when substituting with other MELF-style Zener diodes.