1N5251A

Single Zener Diodes Overview

The Microchip Technology 1N5251A is a 0.5-watt glass axial-lead Zener diode with a nominal voltage of 22V and a ±10% tolerance. It operates within a temperature range of -65°C to +175°C, featuring a maximum reverse current of 100 µA at 17V and a maximum Zener impedance of 29 Ohms at a test current of 5.6 mA. The device utilizes a hermetically sealed DO-35 (DO-204AH) package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' indicates the required ±10% tolerance. Confirm the package type matches the DO-35 glass axial-lead specification. Ensure the manufacturer source aligns with Microsemi/Microchip requirements for your application environment.

Single Zener Diodes Selection Notes

Select this component when a 22V reference with moderate precision is needed. Consider the B suffix for tighter ±5% tolerance or C/D suffixes for higher precision if circuit requirements demand it. Evaluate thermal derating curves for power dissipation limits above 25°C ambient.

Single Zener Diodes Part Context

This part belongs to the popular 1N5221 through 1N5281B series of 0.5-watt Zener Voltage Regulators. The series offers a wide selection from 2.4 to 200 volts, providing flexible options for various voltage regulation needs in standard axial-lead packages.

Single Zener Diodes Replacement Considerations

Direct substitutes include other manufacturers' 1N5251A equivalents meeting JEDEC specifications. Verify that replacement parts maintain the same DO-35 package dimensions and electrical characteristics such as Zener impedance and reverse leakage current.