1N4125 (DO35)

Single Zener Diodes Overview

The Microsemi Corporation 1N4125 (DO35) is a silicon Zener diode rated at 0.5 W power dissipation, housed in an axial-lead glass DO-35 package. It provides a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65 °C to +175 °C. Electrical characteristics include a maximum dynamic impedance of 250 Ω and a maximum noise density of 40 μV/√Hz.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Hermetically sealed glass DO-35 axial-lead package
• Low noise performance suitable for sensitive circuits
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage regulation over broad current and temperature ranges
• High reliability military applications requiring JANS qualification
• Instrumentation circuits requiring minimal capacitance

Single Zener Diodes Procurement Notes

Verify the specific suffixes on the part number to confirm the exact reliability level (JAN, JANTX, JANTXV, or JANS), voltage tolerance (standard, C for 2%, D for 1%), and RoHS compliance status. Ensure the ordering suffix matches the required lead finish and packaging format, such as tape and reel options.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, low-noise Zener reference is required for harsh environments. The internal metallurgical bond offers superior stability compared to standard glass passivated devices. Consider the available tighter tolerances and military qualifications if the application demands strict voltage accuracy and radiation hardness.

Single Zener Diodes Part Context

This component belongs to the 1N4099 through 1N4135 series of 500 mW Zener voltage regulators manufactured by Microsemi. These parts are JEDEC registered and designed for high-reliability applications. The series covers a wide voltage range from 1.8 V to 100 V, utilizing a consistent DO-35 glass package form factor across all variants.

Single Zener Diodes Replacement Considerations

Equivalent parts within the same Microsemi series include 1N4124-1 and 1N4126-1. Verify that any substitute maintains the required voltage tolerance, power rating, and package style to ensure compatibility with existing circuit designs.