1N4626-1

Overview

The Microchip Technology 1N4626-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 5.6 V at a test current of 250 µA, with a maximum dynamic impedance of 1400 Ohms and a reverse leakage current of 5.0 µA. The device operates within a junction temperature range of -65 °C to +175 °C and features a temperature coefficient ranging from -0.020%/°C to +0.040%/°C.

Feature Summary

• Constructed with an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard as described in Microsemi MicroNote 050.

Applications

• Voltage regulation over broad ranges of current and temperature.
• High reliability applications requiring hermetically sealed components.
• Radiation-hardened circuit designs.

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as these are distinct qualification levels under MIL-PRF-19500/435. Confirm that the standard commercial RoHS-compliant versions do not meet the necessary military-grade specifications if radiation hardness or extreme environmental tolerance is required.

Selection Notes

Select this component when a 5.6 V reference is needed in a ruggedized environment. Ensure the design accounts for the specified maximum dynamic impedance of 1400 Ohms and the operating temperature limits up to +175 °C. Verify that the axial-lead DO-35 package fits the mechanical constraints of the target assembly.

Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes. These devices share common construction features, including the metallurgical bond and MIL-PRF-19500/435 qualification options. They are designed to provide stable voltage regulation across a wide temperature range while maintaining low noise characteristics suitable for precision analog circuits.

Replacement Considerations

Direct replacements include other 1N4626 variants such as JAN1N4626DUR-1 or JANTXV1N4626CUR-1, provided they match the required reliability level and package type.

FAQ

What is the maximum noise density for the 1N4626-1?

The datasheet specifies a maximum noise density of 40 μV / √Hz for voltages of 6.8 V and above; however, it falls quickly to lower values at lower voltages like 5.6 V.

Is the 1N4626-1 radiation hard?

Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.