1N4123-1

Single Zener Diodes Overview

The Microchip Technology 1N4123-1 is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 39 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 reverse current of 29.7 µA, a dynamic impedance of 0.01 Ω at the test current of 250 µA, and a noise density of 40 µV/√Hz.

Single Zener Diodes Feature Summary

• Internal metallurgical bond for enhanced structural integrity
• Qualified per MIL-PRF-19500/435 for high reliability applications
• Hermetically sealed glass DO-35 package construction

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability electronic systems requiring radiation hardness
• Precision reference circuits utilizing low noise characteristics

Single Zener Diodes Procurement Notes

Verify the specific qualification level (JAN, JANTX, JANTXV, or JANS) required for the application, as the base part number covers multiple military grades. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are available only on commercial grades. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 39 V Zener voltage is required in an axial-lead glass package. Consider the 5% standard tolerance unless tighter specifications are needed, which require specific suffixes. Evaluate the thermal derating curve for power dissipation limits above 25 °C lead temperature. Verify that the operating environment aligns with the specified temperature range and radiation hardness requirements.

Single Zener Diodes Part Context

This component belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener diodes manufactured by Microchip Technology. These devices are JEDEC registered and designed for robust performance in demanding environments. The series offers extensive voltage selection from 1.8 V to 100 V, supporting diverse circuit design needs across industrial and aerospace sectors.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 39 V nominal voltage, 500 mW power rating, and DO-35 package. Verify equivalent electrical parameters such as dynamic impedance and reverse leakage current. Ensure any substitute meets the same MIL-PRF-19500/435 qualification level if military-grade reliability is mandated.