1N5277A/TR

Single Zener Diodes Overview

The Microchip Technology 1N5277A/TR is a 0.5 W glass axial-lead Zener diode in the DO-35 package, featuring a nominal voltage of 160 V with ±10% tolerance (suffix A). It operates within a temperature range of -65°C to +175°C and exhibits a maximum reverse current of 116 µA at 144 V. The device has a typical Zener impedance of 1.7 kΩ at 0.25 mA and a positive temperature coefficient of +0.11%/°C. The 'TR' suffix indicates tape-and-reel packaging compliant with EIA-296 standards.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Includes internal bonds available with specific suffix identifiers

Single Zener Diodes Applications

• Voltage regulation circuits requiring high-voltage stability
• Temperature-compensated reference applications
• General-purpose protection against overvoltage transients

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required specifications: 'A' denotes ±10% tolerance, while 'e3' indicates RoHS compliance. Confirm the 'TR' suffix corresponds to tape-and-reel packaging rather than bulk supply. Ensure the manufacturer designation aligns with Microsemi or Microchip Technology documentation. Cross-reference JEDEC registration numbers for standard parameter verification.

Single Zener Diodes Selection Notes

Select this component when a 160 V breakdown voltage with moderate tolerance is required. The DO-35 glass package suits applications needing radiation hardness and low capacitance. Consider the positive temperature coefficient for thermal management. Verify power derating requirements if ambient temperatures exceed 50°C. Ensure lead length meets the 3/8 inch minimum for accurate electrical characterization.

Single Zener Diodes Part Context

This part belongs to the 1N5221–1N5281B series of 0.5 W Zener Voltage Regulators. The series offers voltages from 2.4 V to 200 V in standard 5% or 10% tolerances. These devices are JEDEC registered and available in various military screening levels with specific prefixes. The series supports surface mount equivalents in MELF packages and hermetically sealed variants.

Single Zener Diodes Replacement Considerations

Equivalent parts include 1N5277B for tighter 5% tolerance or 1N5277 for non-suffix JEDEC registration. Surface mount alternatives are available as MLL5277B in the DO-213AA MELF package. Military screened versions exist with MQ, MX, MV, or MSP prefixes.