1N4477C

Single Zener Diodes Overview

The Microchip Technology 1N4477C is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 33 V with a tolerance of ±2%. The device is rated for a maximum power dissipation of 1.5 W and operates within an extended temperature range from -65°C to +175°C TJ. Key electrical characteristics include a maximum reverse leakage current of 50 nA at 26.4 V, a Zener impedance of 25 Ohms, and a test current of 7.5 mA. It utilizes a DO-204AL (DO-41) axial leaded package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with tight ±2% tolerance
• Operates in extreme environments up to +175°C junction temperature
• Features low reverse leakage current for precision applications
• Constructed with metallurgical bonding for reliability

Single Zener Diodes Applications

• Precision voltage reference circuits
• Temperature compensated Zener references
• Overvoltage protection in industrial systems

Single Zener Diodes Procurement Notes

Verify the specific suffix 'C' indicates the ±2% tolerance variant when ordering. Confirm RoHS compliance status as historical data may vary by production batch. Ensure the DO-41 axial package matches the PCB footprint requirements. Check for military-grade equivalents like JANS if radiation hardness or enhanced screening is required for the application.

Single Zener Diodes Selection Notes

Select this component when a 33 V reference with high accuracy is needed. The 1.5 W power rating allows for higher current operation compared to standard 500 mW Zeners. Consider the DO-41 package size constraints. Verify that the 25 Ohm impedance meets the dynamic regulation requirements of the circuit design.

Single Zener Diodes Part Context

This part belongs to the 1N4477 series of Zener diodes manufactured by Microchip Technology. It is functionally similar to the 1N4477D but offers tighter voltage tolerance. The series is commonly used in analog signal conditioning and power supply regulation where stable reference voltages are critical.

Single Zener Diodes Replacement Considerations

The 1N4477D is a parameter-equivalent alternative with potentially different tolerance specifications. Military variants such as JANS1N4477C offer enhanced screening but require verification of mechanical and electrical compatibility.