1N4493US

Single Zener Diodes Overview

The Microchip Technology 1N4493US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 150 V. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 1.5 W at 25°C ambient. The device features a maximum dynamic impedance of 700 Ohms at a test current of 1.7 mA, with a maximum reverse leakage current of 25 µA at 100 V. It utilizes a D-5A-2 (MELF) package.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/406 for military applications including JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability voltage regulation in aerospace systems
• Military electronic circuits requiring failure-free operation
• Radiation-hardened power supply designs

Single Zener Diodes Procurement Notes

Verify the specific reliability level suffix (JAN, JANTX, JANTXV, or JANS) required for your application, as qualification varies by grade. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military grades. Ensure the MELF package footprint matches your PCB layout requirements before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a 150 V Zener reference is needed in a surface mount form factor. Consider the 700 Ohm dynamic impedance for noise sensitivity. Evaluate thermal derating curves for high-temperature environments exceeding 25°C. Verify that the 1.5 W steady-state power dissipation aligns with your circuit's thermal management capabilities.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series covers a broad voltage range from 3.3 V to 200 V, providing standardized options for various regulation needs.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N4493 variants with different reliability suffixes such as JANTX1N4493US or JANTXV1N4493US. Cross-reference with standard JEDEC 1N4493 axial parts only if mechanical mounting can be adapted.