1N5277B

Single Zener Diodes Overview

The Microchip Technology 1N5277B is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 160 V with a ±5% tolerance (suffix B). Key electrical parameters include a maximum reverse current of 100 nA, a Zener impedance of 1.7 kΩ at IZK = 0.25 mA, and a positive temperature coefficient of +0.11 %/°C. The device 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
• Positive temperature coefficient characteristic suitable for high-voltage regulation
• Flexible mounting terminals compatible with standard through-hole processes

Single Zener Diodes Applications

• High-voltage reference circuits
• Overvoltage protection stages
• Voltage regulator networks

Single Zener Diodes Procurement Notes

Verify the specific suffix 'B' confirms the required ±5% voltage tolerance. Confirm the package style matches the DO-35 glass axial-lead specification. Ensure the manufacturer source aligns with project requirements for military or commercial screening levels if applicable.

Single Zener Diodes Selection Notes

Select this component when a stable 160 V reference is needed with tight tolerance. Consider the positive temperature coefficient for thermal compensation strategies. Verify that the 1.7 kΩ dynamic impedance meets the noise and stability requirements of the target circuit design.

Single Zener Diodes Part Context

This part belongs to the 1N5221–1N5281B series of 0.5 W Zener diodes. The series covers a wide voltage range from 2.4 V to 200 V. Variants are available with different tolerances and screening prefixes for specialized applications.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5277A (±10% tolerance) and surface-mount MLL5277B variants. Verify pinout compatibility and power derating curves before substitution.