1N4103-1

Single Zener Diodes Overview

The Microchip Technology 1N4103-1 is a silicon Zener diode rated at 9.1 V nominal voltage with a standard tolerance of ±5%. It operates within the axial-leaded, hermetically sealed glass DO-35 (DO-204AH) package and features an internal metallurgical bond. The device supports a maximum power dissipation of 0.5 W and functions across a junction temperature range of -65 °C to +175 °C. Electrical characteristics include a test current of 250 µA, a maximum dynamic impedance of 0.5 Ω, and a maximum reverse leakage current of 7.0 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction utilizing an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/435 standards for JAN, JANTX, JANTXV, and JANS levels.
• Low noise density performance suitable for sensitive signal applications.
• Inherently radiation hard design compliant with Microsemi MicroNote 050.

Single Zener Diodes Applications

• Voltage regulation in military and aerospace circuits
• Reference voltage sources for precision instrumentation
• Overvoltage protection in harsh environments

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required qualification level, as the base part number denotes the JEDEC type only. Confirm RoHS compliance status if environmental restrictions apply, noting that specific suffixes may indicate commercial grade availability. Ensure the procurement documentation explicitly references MIL-PRF-19500/435 for qualified variants.

Single Zener Diodes Selection Notes

Select this component when a stable 9.1 V reference is required in a through-hole glass package. Consider the low dynamic impedance and tight tolerance requirements for precision regulation. Evaluate the thermal derating curve for ambient operating conditions above 25 °C to ensure the 0.5 W rating remains sufficient.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of low-noise Zener diodes manufactured by Microchip Technology. The series provides a wide selection of voltages from 1.8 V to 100 V in various tolerance grades. These components are designed for high-reliability applications requiring robust performance under extreme environmental conditions.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 9.1 V nominal voltage, DO-35 package, and MIL-PRF-19500/435 qualification level. Verify that substitute parts maintain equivalent noise density and dynamic impedance specifications for critical circuit performance.

Single Zener Diodes FAQ

What is the maximum noise density specified for the 1N4103-1?

The maximum noise density is 40 μV/√Hz measured at the test current of 250 µA.

How is polarity indicated on the DO-35 package?

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