1N5253A

Single Zener Diodes Overview

The Microchip Technology 1N5253A is a silicon Zener diode with a nominal voltage of 25 V and a 10% tolerance. It operates in the DO-35 glass axial-lead package, providing a maximum power dissipation of 0.5 W at 25°C. The device features a test current of 5.0 mA and a maximum reverse current of 100 µA at 24 V. Its zener impedance is specified as 35 Ohms at a test current of 0.25 mA. The component supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for reliable operation
• Capable of regulating voltage across a broad operating current and temperature range
• Inherently radiation hard per MicroNote 050
• Minimal capacitance characteristics suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage regulation circuits requiring stable reference voltages
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and tolerance suffix. Confirm compliance with environmental directives if RoHS status is mandatory, noting that standard versions may differ from e3 suffix variants. Ensure the supplier provides documentation confirming the hermetic seal integrity and adherence to MIL-PRF-19500 screening levels if military-grade reliability is required for the application.

Single Zener Diodes Selection Notes

Select this component when a precise 25 V reference is needed within the 0.5 W power class. The 10% tolerance (suffix A) offers a balance between cost and precision compared to tighter tolerance options. Consider the thermal resistance and derating curves if the ambient temperature exceeds 25°C or if mounting on FR4 boards without adequate copper pads. Evaluate the low capacitance requirement against other series members if high-speed switching is involved.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 2.4 to 200 volts. The 1N5253A specifically addresses the 25 V segment of this lineup, utilizing the standard DO-35 package format common in through-hole PCB designs.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5253B for 5% tolerance requirements. Surface mount alternatives are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. Verify pinout compatibility and thermal performance when substituting with generic equivalents.