1N5273B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5273B/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 package, featuring a nominal voltage of 120 V with ±5% tolerance (B suffix). It operates within a temperature range of -65°C to +175°C and includes a TR suffix for tape-and-reel packaging. Key electrical parameters include a maximum reverse current of 10 µA at 91 V, a dynamic impedance of 4 kΩ at 1 mA, and a positive temperature coefficient of +0.110 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features a hermetically sealed glass axial-lead DO-35 package for flexible mounting
• Inherently radiation hard per MicroNote 050 specifications
• Minimal capacitance characteristics suitable for high-frequency applications

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the tape-and-reel packaging format as specified in the datasheet mechanical section. Confirm the B suffix indicates the required ±5% voltage tolerance. Ensure the component meets the specific JEDEC registration requirements for the 1N5273 type number before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a 120 V Zener voltage with tight ±5% tolerance is required in a standard axial-lead package. The device is suitable for applications needing inherent radiation hardness and low capacitance. Consider the power derating curve if operating temperatures exceed 50°C or if mounted on FR4 PCBs without adequate copper pads.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators manufactured by Microsemi (now Microchip Technology). The series offers a wide selection from 2.4 to 200 volts in standard DO-35 packages. The 1N5273 variant specifically targets higher voltage regulation needs within this established product line.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. Direct replacements must maintain the 120 V nominal voltage and ±5% tolerance to ensure circuit compatibility.