1N4476C

Single Zener Diodes Overview

The Microchip Technology 1N4476C is a Zener voltage regulator diode designed for high-reliability applications. It features a nominal Zener voltage of 30 V with a tight tolerance of ±2%. The device operates in a through-hole DO-41-2 package and dissipates up to 1.5 W of power. Key electrical parameters include a Zener impedance of 20 Ohms at a test current of 8.5 mA, a maximum reverse leakage current of 50 nA, and a forward voltage of 1.5 V at 1 A. It supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction ensuring robust performance in demanding environments
• Military qualification per MIL-PRF-19500/406 for critical reliability standards
• Internal metallurgical bond providing enhanced structural integrity

Single Zener Diodes Applications

• High-reliability military systems requiring zero failure tolerance
• Spacecraft electronics and avionics circuits
• Harsh environment industrial control equipment

Single Zener Diodes Procurement Notes

Verify the specific suffix 'C' against official datasheets to confirm the 2% tolerance variant, as standard versions may differ. Confirm RoHS status and compliance documentation directly with the manufacturer. Ensure the procurement channel provides valid traceability records required for military-grade components. Check for recent Product Change Notifications (PCNs) that may affect specifications or packaging.

Single Zener Diodes Selection Notes

Select this component when a precise 30 V regulation is required with strict tolerance limits in a high-power through-hole format. Compare against standard 5% tolerance variants if cost is a primary constraint and precision is less critical. Ensure the circuit design accommodates the 1.5 W power dissipation and the specified thermal operating range. Verify compatibility with existing board layouts for the DO-41-2 package.

Single Zener Diodes Part Context

This part belongs to the 1N4460–1N4496 series of 1.5 W glass Zener diodes manufactured by Microchip Technology. These devices are industry-recognized for their triple-layer passivation and void-less hermetic sealing. The series covers a wide voltage range from 3.3 V to 200 V, serving both commercial and qualified military levels including JAN, JANTX, JANTXV, and JANS.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the 30 V Zener voltage, 1.5 W power rating, DO-41-2 package, and 2% tolerance. Verify that any replacement also meets MIL-PRF-19500/406 qualifications if military grade is required. Cross-reference with other manufacturers offering hermetically sealed glass Zener diodes with identical pinout and electrical characteristics.