1N4105 (DO35)

Single Zener Diodes Overview

The Microsemi Corporation 1N4105 (DO35) is a silicon Zener voltage regulator diode housed in a hermetically sealed glass axial-lead DO-35 package. It provides an 11 V nominal Zener voltage with a standard tolerance of ±5%. The device operates at a test current of 250 µA and features a maximum dynamic impedance of 200 Ω. Rated for 0.5 W power dissipation, it supports a junction temperature range from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Low noise density characteristics suitable for precision applications
• Hermetically sealed glass axial-lead packaging
• Qualified per MIL-PRF-19500/435 standards

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability military and aerospace electronic circuits
• Precision instrumentation requiring stable reference voltages

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm the required qualification level, such as JAN, JANTX, JANTXV, or JANS, as these determine the manufacturing lot traceability and testing rigor. Confirm whether RoHS compliance is required, noting that commercial versions may differ from military qualified parts. Ensure the package type matches the design requirements, as surface mount equivalents exist within the same series.

Single Zener Diodes Selection Notes

Select this component when a stable 11 V reference is needed in a ruggedized environment. The DO-35 package allows for flexible axial-lead mounting. Consider the low noise density if the application involves sensitive signal processing. Verify thermal derating requirements against the expected ambient operating conditions to ensure the 0.5 W rating is not exceeded.

Single Zener Diodes Part Context

This part belongs to the 1N4099 through 1N4135 series of 500 mW metallurgically bonded glass Zener diodes. These devices are JEDEC registered and offer extensive voltage selection from 1.8 V to 100 V. The series is designed for high-reliability applications and is available in various tolerance grades and military qualification levels.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 11 V Zener diodes in the DO-35 package with matching power ratings and impedance specifications. Cross-reference with the 1N4614–1N4627 series for similar performance characteristics. Verify that any substitute meets the same MIL-PRF-19500/435 qualification requirements if used in military-grade designs.