1N6334

Overview

The Microchip Technology 1N6334 is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a 27 V nominal Zener voltage with a standard ±5% tolerance and operates within a junction temperature range of -65°C to +175°C. The device utilizes a voidless hermetically sealed glass package with axial leads, providing robust construction and internal metallurgical bonding. Rated for 0.5 W steady-state power dissipation at a lead temperature of 75°C, it offers low reverse leakage current and inherent radiation hardness.

Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds
• Military qualification per MIL-PRF-19500/533 standards
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Applications

• High-reliability aerospace systems
• Military electronic circuits
• Voltage regulation in extreme temperature environments
• Radiation-hardened electronics

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as these levels dictate performance specifications and availability. Confirm RoHS compliance status, noting that commercial versions may differ from military-grade parts. Ensure the ordering suffix matches the desired voltage tolerance and packaging configuration before finalizing procurement.

Selection Notes

Select this component when a 27 V reference is needed in harsh environments requiring hermetic sealing. Consider the thermal resistance values for derating calculations based on lead or ambient mounting conditions. Evaluate the dynamic impedance and noise density requirements against the datasheet specifications to ensure compatibility with sensitive signal paths.

Part Context

The 1N6334 belongs to the 1N6309 through 1N6355D series of 0.5 W glass Zener diodes. This family provides a wide selection of voltages from 2.4 V to 200 V. The series is recognized for its robust DO-35 axial-lead package and is widely used in industries where failure cannot be tolerated due to the device's proven reliability and physical durability.

Replacement Considerations

Publicly confirmed substitute part numbers include JAN1N6334C, JAN1N6334D, and JANS1N6334D. These variants share the same JEDEC type number but differ in reliability levels and voltage tolerances. Verify electrical characteristics match the original design requirements before substitution.

FAQ

What is the maximum steady-state power dissipation?

The maximum steady-state power dissipation is 0.5 W when the lead temperature is maintained at 75°C.

Is the 1N6334 resistant to radiation?

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

What is the operating temperature range?

The junction and storage temperature range is -65°C to +175°C.