1N4488US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4488US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 91 V. It operates within a junction and storage 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 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.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction using internal metallurgical bonds for robust performance
• Military qualification available per MIL-PRF-19500/406 standards
• Triple-layer passivation provides enhanced protection against environmental factors

Single Zener Diodes Applications

• High-reliability applications where failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as the base part number may not indicate military qualification without the appropriate prefix. Confirm RoHS compliance status if lead-free terminals are mandatory, noting that commercial versions offer this option while military grades typically use tin/lead terminations. Ensure the tape and reel packaging aligns with your automated assembly equipment specifications.

Single Zener Diodes Selection Notes

Select this component when a 91 V reference is needed in a compact surface mount form factor. Consider the thermal resistance of 20°C/W and power derating curves for high-temperature environments. Verify that the 200 Ohm dynamic impedance meets the noise and stability requirements of your specific regulation circuit compared to lower impedance alternatives.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These components serve as surface mount equivalents to popular JEDEC registered axial-lead series, offering similar electrical characteristics in a smaller footprint suitable for modern PCB layouts.

Single Zener Diodes Replacement Considerations

Direct replacements include other members of the 1N44xxUS series from Microchip/Microsemi. For equivalent axial-lead packages, consider the 1N4460–1N4496 series. Military qualified variants require matching prefixes such as JAN1N4488US or JANTX1N4488US.