1N5279A

Single Zener Diodes Overview

The Microchip Technology 1N5279A is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 180 V with a standard tolerance of ±10%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 130 µA at 130 V. Its electrical characteristics include a Zener impedance of 6000 Ohms at IZK = 0.25 mA and a positive voltage temperature coefficient of +0.110 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance suitable for high-frequency applications
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge (ESD)

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection systems
• Temperature compensation networks

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' confirms the required ±10% voltage tolerance. Confirm the package type matches the DO-35 glass axial-lead specification. Ensure the manufacturer designation aligns with Microsemi/Microchip requirements for your design. Check RoHS compliance status if applicable, as standard versions may differ from e3 variants.

Single Zener Diodes Selection Notes

Select this component when a precise 180 V regulation point is needed with moderate tolerance. Consider the positive temperature coefficient for thermal stability calculations. Verify that the 0.5 W power dissipation rating meets the circuit's steady-state requirements. Evaluate the high Zener impedance against load regulation needs.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 V to 200 V. Standard tolerances are available with A or B suffixes, while tighter tolerances use C or D suffixes. Military screening options exist with specific prefixes.

Single Zener Diodes Replacement Considerations

Consult the manufacturer datasheet for direct equivalents within the 1N5221-1N5281B series. Surface mount equivalents are available in the MLL5221 to MLL5281B MELF package. Verify pinout compatibility and thermal derating curves before substitution.