1N5251A-1

Single Zener Diodes Overview

The Microchip Technology 1N5251A-1 is a single silicon Zener diode designed for through-hole mounting in the DO-35 (DO-204AH) glass axial package. It features a nominal Zener voltage of 22 V with a tolerance of ±10% and a power dissipation rating of 500 mW. The device operates within a temperature range of -65 °C to +175 °C, offering high reliability suitable for demanding environments.

Single Zener Diodes Feature Summary

• Metallurgically bonded glass construction for enhanced durability
• Hermetically sealed design ensuring environmental protection
• High-temperature operation capability up to 175 °C

Single Zener Diodes Applications

• Voltage regulation in military aerospace systems
• Overvoltage protection circuits
• Reference voltage generation in precision instrumentation

Single Zener Diodes Procurement Notes

Verify the specific suffix '-1' indicates the correct screening level or variant requirements for your application. Confirm that the DO-35 package dimensions match your PCB footprint. Ensure the manufacturer documentation specifies the exact test conditions for the 22 V Zener voltage and dynamic impedance parameters before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, high-reliability Zener diode is required for harsh environments. The 22 V breakdown voltage and 500 mW power rating define its operational limits. Consider the DO-35 package size for space constraints and verify thermal management needs for continuous operation near the maximum power dissipation rating.

Single Zener Diodes Part Context

This part belongs to the 1N5251 series of 0.5 W Zener diodes manufactured by Microchip Technology. The series offers various voltage options from 2.4 V to 200 V in standard tolerances. The 1N5251A-1 specifically provides a 22 V option with high-reliability screening, distinguishing it from commercial-grade equivalents.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the 1N5251B (onsemi) and MX1N5251DE3 (Microsemi), provided the package type and electrical specifications align with the system requirements. Verify that any replacement maintains the hermetic seal and high-temperature operating range if used in critical applications.