1N4125-1

Single Zener Diodes Overview

The Microchip Technology 1N4125-1 is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 47 V with a standard tolerance of ±5%. The device operates at a test current of 250 µA and exhibits a maximum dynamic impedance of 250 Ohms. It features a maximum reverse leakage current of 40 µA and a noise density of 40 µV/√Hz. The temperature coefficient is +0.095 %/°C, and it supports a junction temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using an internal metallurgical bond within a glass DO-35 package.
• Qualified for high reliability applications under MIL-PRF-19500/435 standards.
• Inherently radiation hard design suitable for demanding environments.
• Low noise performance with minimal capacitance characteristics.

Single Zener Diodes Applications

• Voltage regulation in aerospace and defense circuits
• High-reliability industrial power supplies
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS) as these define the qualification grade. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from military grades. Ensure the package type corresponds to the intended mounting method before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, radiation-hardened Zener diode is required for critical systems. The 47 V rating and low noise profile make it suitable for precision analog applications. Verify that the thermal derating requirements align with the expected operating environment to ensure the 500 mW power dissipation limit is not exceeded during operation.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener regulators manufactured by Microchip Technology. These devices are JEDEC registered and designed for robust performance in harsh conditions. The series offers a wide range of voltages from 1.8 V to 100 V, providing flexibility for various voltage regulation needs across different industries.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other 1N4125 variants from different manufacturers that meet the same electrical specifications and package dimensions. Ensure any replacement maintains the hermetic seal and radiation hardness if used in qualified applications. Verify that the replacement part meets the MIL-PRF-19500/435 qualification if the original system requires it.