1N5279BE3

Single Zener Diodes Overview

The Microchip Technology 1N5279BE3 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 180 V with a tolerance of ±5%. The device operates in a DO-204AH (DO-35) axial through-hole package and dissipates up to 500 mW. Key electrical parameters include a maximum reverse leakage current of 100 nA at 137 V, a Zener impedance of 2200 Ohms, and a forward voltage of 1.5 V at 200 mA. It supports a wide operating temperature range from -65°C to +175°C junction temperature.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation within a high-voltage range using a glass axial-leaded construction.
• Capable of reliable operation across an extended industrial and military-grade temperature spectrum.
• Offers tight voltage tolerance for precision reference and protection circuits.

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement instrumentation

Single Zener Diodes Procurement Notes

Verify the specific suffix BE3 indicates lead-free and RoHS compliance status against the manufacturer's latest documentation. Confirm the package type matches the required DO-204AH footprint for PCB layout. Ensure the thermal management design accommodates the 500 mW power dissipation rating under worst-case operating conditions. Cross-reference the manufacturing date code and lot traceability if required by quality standards.

Single Zener Diodes Selection Notes

Select this component when a precise 180 V regulation point is required in a standard axial package. Consider the 2200 Ohm Zener impedance for noise sensitivity in the application circuit. Evaluate the 100 nA leakage current limit for low-power standby modes. Compare the thermal resistance characteristics against alternative packages if space constraints exist.

Single Zener Diodes Part Context

This part belongs to the 1N5221B through 1N5281B series of 0.5 W Zener diodes manufactured by Microchip Technology. The series provides a broad selection of voltages from 2.4 V to 200 V in standard DO-35 glass axial packages. These devices are commonly used in general-purpose electronics requiring reliable voltage clamping or regulation.

Single Zener Diodes Replacement Considerations

Publicly confirmed substitute part numbers include 1N5279, 1N5279/TR, 1N5279B-1, and 1N5279B-1/TR. Verify that any replacement maintains the same 180 V Zener voltage, 500 mW power rating, and DO-35 package compatibility.