1N6309US

Single Zener Diodes Overview

The Microchip Technology 1N6309US is a 500mW glass Zener diode in a voidless hermetically sealed MELF package. It provides a nominal Zener voltage of 2.4V with standard 5% tolerance, available in tighter 1% and 2% options. Qualified per MIL-PRF-19500/533 for JAN, JANTX, JANTXV, and JANS levels, it operates from -65°C to +175°C. The device features internal metallurgical bonds and offers radiation hardness and ESD robustness suitable for high-reliability military applications.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification per MIL-PRF-19500/533 across multiple reliability levels
• Inherently radiation hard and non-sensitive to electrostatic discharge
• Surface mount MELF package equivalent to axial-leaded JEDEC registered series

Single Zener Diodes Applications

• High-reliability voltage regulation where failure cannot be tolerated
• Military and aerospace electronic systems requiring radiation hardness
• Circuit protection against electrostatic discharge events
• Voltage reference applications in extreme temperature environments

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this affects qualification standards. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS versions are commercial grade only. Ensure the voltage tolerance matches the design needs, as tighter tolerances require specific ordering suffixes. Check lead finish specifications for soldering compatibility.

Single Zener Diodes Selection Notes

Select the 1N6309US when a low voltage reference near 2.4V is needed in a surface mount form factor. Consider the thermal resistance values for power derating calculations based on end-cap or ambient mounting. Choose tighter voltage tolerances if circuit precision demands exceed standard 5% limits. Verify radiation hardness requirements against the component's inherent properties for space or high-altitude missions.

Single Zener Diodes Part Context

This component belongs to the 1N6309US through 1N6355DUS series of 0.5-watt Zener voltage regulators. The series spans voltages from 2.4V to 200V, offering various tolerance options. The US suffix denotes the MELF surface mount package, while DUS indicates the axial-leaded variant. All parts share the same hermetic glass construction and military qualification framework.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N6309 variants with matching voltage and tolerance. Surface mount equivalents must maintain the MELF package dimensions. Axial-leaded alternatives like 1N6309D may be used if board layout permits. Verify that any substitute meets the same MIL-PRF-19500/533 reliability level and radiation hardness requirements.