1N4124-1

Single Zener Diodes Overview

The Microchip Technology 1N4124-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 43 V at a test current of 250 µA, with a maximum dynamic impedance of 0.01 Ω and reverse current of 32.7 µA. The device operates within a junction temperature range of -65 °C to +175 °C and features a thermal resistance of 300 °C/W. It is qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS reliability levels.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Qualified to MIL-PRF-19500/435 standards including JANS level
• Hermetically sealed axial-lead glass DO-35 package
• Low noise density characteristics suitable for precision regulation

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Radiation-hardened electronic systems
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific reliability grade (JAN, JANTX, JANTXV, or JANS) required for the application, as qualification levels vary. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military grades. Ensure the ordering suffix matches the desired tolerance and packaging configuration before procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust voltage regulation under extreme environmental conditions. The 43 V nominal rating and low dynamic impedance make it suitable for stable reference designs. Consider the operating temperature range and power derating requirements when designing the thermal management strategy for the circuit.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener diodes manufactured by Microsemi (now Microchip). These devices are designed for demanding environments where standard commercial components may fail. The series offers a wide range of voltages with various tolerance options to meet specific circuit requirements.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 43 V Zener voltage, 500 mW power rating, and DO-35 package. Verify that substitute parts meet the same MIL-PRF-19500/435 qualification levels if radiation hardness or high reliability is required.

Single Zener Diodes FAQ

What is the maximum operating junction temperature for the 1N4124-1?

The maximum operating junction temperature is +175 °C.

How is the polarity indicated on the 1N4124-1 package?

Polarity is indicated by a band on the cathode end of the diode.