JAN1N4493US/TR

Single Zener Diodes Overview

The JAN1N4493US/TR is a military-qualified, 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 test current of 1.7 mA, a maximum dynamic impedance of 700 Ohms, and a maximum reverse leakage current of 250 nA. Packaged in the D-5A-2 MELF format, it utilizes void-less hermetically sealed glass construction.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass package with internal metallurgical bonds for high-reliability environments.
• Qualified per MIL-PRF-19500/406 standards for critical applications where failure is not tolerated.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military-grade electronic circuits
• Harsh environment voltage regulation

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN) and tolerance. Confirm the package type corresponds to the D-5A-2 MELF form factor. Ensure the procurement documentation explicitly references MIL-PRF-19500/406 qualification. Validate that the component meets the specified thermal and electrical parameters for your operating conditions.

Single Zener Diodes Selection Notes

Select this component when a 150 V Zener diode is required in a surface-mount configuration. It is suitable for designs needing robustness against radiation and ESD. Consider the 1.5 W power dissipation limit and the -65°C to +175°C operating range. Verify compatibility with the D-5A-2 footprint during PCB layout.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 W glass Zener diodes. These devices are designed as surface-mount equivalents to traditional axial-lead JEDEC registered series. They provide a compact solution for voltage regulation in space-constrained, high-reliability applications requiring hermetic sealing.

Single Zener Diodes Replacement Considerations

Direct replacements include other JANTX or JANTXV versions of the 1N4493US if higher reliability levels are needed. Cross-reference with commercial grade 1N4493 variants only if military qualification is not required. Ensure any substitute maintains the same D-5A-2 package dimensions and 150 V nominal voltage.

Single Zener Diodes FAQ

What is the maximum steady-state power dissipation?

The maximum steady-state power dissipation is 1.5 W at an ambient temperature of 25°C.

Is the device sensitive to electrostatic discharge?

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