1N4108 (DO35)

Single Zener Diodes Overview

The Microsemi 1N4108 is a 500 mW Zener voltage regulator diode housed in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 14 V with a test current of 250 µA. The device features an internal metallurgical bond and offers tight voltage tolerances, including standard 5%, 2% (suffix C), and 1% (suffix D). It operates within a junction temperature range of -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Hermetically sealed glass DO-35 axial-lead package
• Low noise density performance suitable for precision applications
• Qualified per MIL-PRF-19500/435 for military levels

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability electronic circuits requiring radiation hardness
• Precision reference voltage generation in harsh environments

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm the required tolerance level and qualification grade. Ensure the ordering suffix matches the desired metallurgical bond option and RoHS compliance status if applicable. Confirm that the component meets the specific environmental requirements for your application before procurement.

Single Zener Diodes Selection Notes

Select this component when a robust, low-noise Zener diode is needed for critical voltage regulation. The DO-35 package allows for flexible axial-lead mounting. Consider the available tolerance options (5%, 2%, or 1%) based on circuit precision requirements. Verify thermal derating curves for operation above ambient temperatures.

Single Zener Diodes Part Context

This component belongs to the 1N4099 through 1N4135 series of 500 mW Zener diodes manufactured by Microsemi. The series covers a wide voltage range from 1.8 V to 100 V. These devices are designed for high-reliability applications and are available in various military qualification levels, including JAN, JANTX, JANTXV, and JANS.

Single Zener Diodes Replacement Considerations

Compatible replacements include other manufacturers' JEDEC registered 1N4108 equivalents in the DO-35 package. Ensure any substitute maintains the 14 V nominal voltage, 500 mW power rating, and hermetic sealing characteristics required for the original application.