1N4117 (DO35)

Single Zener Diodes Overview

The Microsemi Corporation 1N4117 is a 25 V Zener voltage regulator diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. It features an internal metallurgical bond and operates within a junction temperature range of -65 °C to +175 °C with a rated average power dissipation of 0.5 W at 25 °C lead temperature. The device exhibits a maximum dynamic impedance of 150 Ω, a test current of 250 µA, and a maximum reverse current of 19.0 µA. Noise density is limited to 40 µV/√Hz, and the temperature coefficient of the Zener voltage is +0.090 %/°C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for enhanced reliability
• Hermetically sealed glass axial-lead packaging
• Low noise density characteristics suitable for precision applications
• Qualified for high-reliability military standards including JANS

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability instrumentation circuits
• Radiation-hardened electronic systems

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and tolerance level. Confirm whether the order requires standard commercial grade or specific military qualification levels such as JAN, JANTX, JANTXV, or JANS. Ensure the metallurgically bonded variant is selected if specified. Check RoHS compliance status, noting that compliant versions are available only on commercial grades.

Single Zener Diodes Selection Notes

Select this component when a stable 25 V reference is needed in a through-hole glass package. Consider the 0.5 W power rating and derating requirements for thermal management. Evaluate the low noise density and tight temperature coefficient for sensitive analog signal paths. Verify that the axial-lead form factor fits the mechanical constraints of the target assembly.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of 500 mW metallurgically bonded glass Zener diodes. These components provide a wide selection of voltages from 1.8 V to 100 V with various tolerance options. The series is designed for high-reliability applications requiring robust performance under extreme environmental conditions.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4099-1 through 1N4135-1 series that share the same 25 V nominal voltage and DO-35 package. Cross-reference with equivalent military-qualified variants like JANTX1N4117-1 if higher screening levels are required.

Single Zener Diodes FAQ

What is the maximum operating temperature for the 1N4117?

The maximum junction and storage temperature for the 1N4117 is +175 °C.

Does the 1N4117 feature an internal metallurgical bond?

Yes, the 1N4117 is constructed with an internal metallurgical bond to ensure structural integrity and reliability.

What is the typical capacitance of the 1N4117?

The datasheet provides a graph showing typical capacitance versus Zener voltage but does not list a single fixed value; it indicates minimal capacitance suitable for high-frequency applications.