1N5277A (DO-35)

Single Zener Diodes Overview

The Microsemi 1N5277A is a 0.5 W glass axial-lead Zener diode in the DO-35 package, providing a nominal voltage of 160 V with a ±10% tolerance. It operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 116 µA at 86 V. The device exhibits a positive temperature coefficient of +0.110 %/°C and a maximum Zener impedance of 5500 Ω at a test current of 1700 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-35 (DO-204AH) package for reliable operation
• Inherently radiation hard per MicroNote 050
• Minimal capacitance characteristics suitable for high-frequency applications
• Flexible axial-lead mounting terminals

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Military screening levels available via specific prefixes
• High-voltage reference circuits requiring stable breakdown characteristics

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required tolerance level, as standard JEDEC types lack guaranteed limits on all parameters. Confirm whether military screening prefixes or RoHS compliant suffixes are necessary for the specific application requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 160 V Zener voltage with 10% tolerance is required in a through-hole glass package. Ensure the circuit design accommodates the high dynamic impedance and positive temperature coefficient inherent to high-voltage Zener diodes in this series.

Single Zener Diodes Part Context

This part belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series provides a selection from 2.4 to 200 volts in standard 5% or 10% tolerances, along with tighter tolerances identified by different suffix letters on the part number.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the DO-213AA MELF style package, specifically the MLL5277 series. Other variants within the same series offer different voltage ratings or tighter tolerance suffixes such as B, C, or D.