1N5273A

Single Zener Diodes Overview

The Microchip Technology 1N5273A is a silicon unidirectional Zener voltage regulator diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. It provides a nominal Zener voltage of 120 V with a maximum power dissipation of 0.5 W at 25°C. The device features a maximum reverse current of 86 μA and a maximum Zener impedance of 900 Ω. It operates within a temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Capable of regulating voltage across a broad operating current and temperature range
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Overvoltage protection applications
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific suffix letter on the part number to confirm the exact voltage tolerance, as standard A suffix indicates ±10% while B indicates ±5%. Confirm that the procurement order specifies the correct JEDEC registered type if strict parameter compliance is required. Ensure the component matches the DO-35 package dimensions for proper board layout integration.

Single Zener Diodes Selection Notes

Select this component when a stable 120 V reference is needed in a through-hole design. Consider the thermal resistance of 250 °C/W junction-to-lead when calculating derating curves for high ambient temperatures. Verify that the maximum reverse current and impedance specifications meet the circuit's leakage and stability requirements.

Single Zener Diodes Part Context

This component 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. The 1N5273A specifically represents the 120 V variant within this extensive lineup of glass axial-leaded devices.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. Devices with internal metallurgical bonds can be identified by adding a “-1” suffix to the part number.