1N4488US

Single Zener Diodes Overview

The Microchip Technology 1N4488US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 91 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 temperature. The device features a maximum dynamic impedance of 200 Ohms at the test current of 2.8 mA, with a maximum reverse leakage current of 25 µA at 69.2 V. It utilizes a voidless hermetically sealed glass package with tungsten slugs.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction using internal metallurgical bonds for robust performance.
• Qualified per MIL-PRF-19500/406 for high-reliability applications where failure cannot be tolerated.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges.
• High-reliability military and aerospace circuits requiring strict qualification standards.
• Radiation-hardened electronic systems.

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS) and tolerance. Confirm RoHS compliance status if applicable, as commercial versions may differ from qualified levels. Ensure the MELF surface mount footprint aligns with the design layout before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 91 V Zener reference is needed in a surface mount form factor. Consider the 1.5 W power dissipation limit and thermal resistance characteristics for heat management. Verify that the 200 Ohm dynamic impedance meets the circuit's noise and stability requirements compared to lower impedance alternatives.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of industry-recognized 1.5 watt Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series, offering similar electrical characteristics in a compact D-5A (MELF) package suitable for automated assembly.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N4488 variants with different tolerance suffixes (e.g., C for 2%, D for 1%) or reliability prefixes (JAN, JANTX). Axial lead equivalents like the 1N4488 are available but require different mounting considerations.