1N4493US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4493US/TR 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 test current of 1.7 mA, a maximum dynamic impedance of 700 Ohms, and a maximum reverse leakage current of 25 µA at the rated voltage. It utilizes an A (D-5A) MELF package.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for robust performance.
• Military qualification available per MIL-PRF-19500/406 standards.
• Inherently radiation hard design suitable for demanding environments.

Single Zener Diodes Applications

• High-reliability voltage regulation where failure is not tolerated.
• Broad operating current and temperature range stabilization.
• Radiation-hardened electronic circuit protection.

Single Zener Diodes Procurement Notes

Verify the specific reliability level suffix (JAN, JANTX, JANTXV, or JANS) required for your application, as these denote different qualification tiers under MIL-PRF-19500/406. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military grades. Ensure the tape and reel packaging meets EIA-481-B standards for your assembly line.

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 requirements. Verify thermal management capabilities against the 20 °C/W junction-to-end cap resistance. Ensure the 1.5 W power rating aligns with the expected dissipation in the target circuit environment.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices are designed as surface mount equivalents to popular JEDEC registered axial series. They share common mechanical attributes including tungsten slugs and triple-layer passivation within the D-5A MELF package.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 150 V Zener voltage, 1.5 W power rating, and D-5A MELF package. Verify equivalent MIL-PRF-19500/406 qualification levels if military grade reliability is required. Check dynamic impedance and leakage current specifications to ensure circuit compatibility.

Single Zener Diodes FAQ

What is the maximum continuous Zener current for the 1N4493US?

The maximum continuous regulator current (IZM) is 95 mA.

Is the 1N4493US sensitive to electrostatic discharge?

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