1N5231BUR-1E3

Single Zener Diodes Overview

The Microchip Technology 1N5231BUR-1E3 is a surface mount Zener voltage regulator in a DO-213AA (MLL34) package. It provides a nominal Zener voltage of 5.1 V at a test current of 20 mA with a ±5% tolerance. The device features a maximum dynamic impedance of 17 Ohms and a maximum reverse leakage current of 5.0 µA. Rated for 0.5 W steady-state power dissipation, it operates within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed metallurgically bonded glass surface mount package
• Inherently radiation hard per Microsemi specifications
• Non-sensitive to electrostatic discharge
• Minimal capacitance characteristics

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring radiation hardness
• Surface mount designs replacing axial-leaded equivalents

Single Zener Diodes Procurement Notes

Verify the specific suffix configuration against the manufacturer's part nomenclature guide to confirm RoHS compliance status and tolerance class. Ensure the ordering code matches the required reliability level, as commercial versions differ from screened military-grade options. Confirm package dimensions align with the target PCB footprint before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. The 5.1 V nominal voltage suits standard reference needs. Consider the low capacitance and radiation hardness for specialized environments. Verify thermal derating requirements based on the FR4 PC board mounting conditions specified in the datasheet.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which serves as the surface mount equivalent to the JEDEC registered 1N5221 to 1N5281 axial series. The series covers Zener voltages from 2.4 V to 200 V in a 0.5 W metallurgically bonded configuration. The 1N5231 variant specifically addresses the 5.1 V segment of this extensive lineup.

Single Zener Diodes Replacement Considerations

The 1N5231B is the axial-leaded equivalent within the same series. Surface mount alternatives include the MLL5231B-1E3. Verify pinout polarity and package dimensions when substituting between axial and MELF styles.