1N4100 (DO35)

Single Zener Diodes Overview

The Microsemi Corporation 1N4100 is a 7.5 V Zener voltage regulator with a 5% tolerance, housed in an axial-lead glass DO-35 package. It features a maximum power dissipation of 500 mW and operates within a temperature range of -65 °C to +175 °C. The device incorporates an internal metallurgical bond for high reliability and hermetic sealing. Electrical characteristics include a maximum reverse current of 1 µA and a dynamic impedance of 200 Ω at the test current.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-35 package with flexible axial-lead mounting terminals.
• Internal metallurgical bond construction for enhanced structural integrity.
• Low noise density performance suitable for sensitive analog applications.
• Inherently radiation hard design compliant with MIL-PRF-19500/435 standards.

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature.
• High reliability aerospace and defense electronic circuits.
• Precision reference voltage generation in harsh environments.

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as these levels dictate qualification standards. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from military-qualified parts. Ensure the metallurgically bonded variant is specified when high reliability is mandatory.

Single Zener Diodes Selection Notes

Select this component for applications requiring stable voltage regulation in extreme thermal conditions up to 175 °C. Consider the low noise density specification for signal-sensitive circuits. Evaluate the available voltage tolerances (5%, 2%, 1%) based on circuit precision requirements. Verify lead length and soldering compatibility with MIL-STD-750 methods.

Single Zener Diodes Part Context

This part belongs to the 1N4099 through 1N4135 series of 500 mW Zener diodes manufactured by Microsemi. These devices are JEDEC registered and designed for robust performance in demanding environments. The series offers a wide selection of voltages from 1.8 V to 100 V, providing flexibility for various regulatory needs in industrial and military systems.

Single Zener Diodes Replacement Considerations

Equivalent parts must match the 7.5 V nominal voltage, 500 mW power rating, and DO-35 package dimensions. Verify that substitute components offer comparable noise density and reverse leakage current specifications. Ensure any replacement maintains the required operating temperature range and hermetic sealing if used in critical applications.

Single Zener Diodes FAQ

What is the maximum noise density for the 1N4100?

The maximum noise density is 40 μV/√Hz at the test current.

How is polarity indicated on the device?

Polarity is indicated by a band on the cathode end; the banded end should be positive with respect to the opposite end for Zener regulation.