1N5222BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5222BUR-1 is a surface mount Zener voltage regulator with a nominal breakdown voltage of 2.5 V at a test current of 20 mA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W. The device features a maximum dynamic impedance of 30 Ohms, a reverse leakage current of 100 µA, and a temperature coefficient of -0.085 %/°C. Packaged in the hermetically sealed DO-213AA (MLL34) glass MELF configuration, it provides a metallurgically bonded surface mount equivalent to the JEDEC registered 1N5222B.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount package with internal metallurgical bond
• 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
• Space-grade timing and defense electronics requiring radiation hardness
• Industrial and automotive circuits needing ESD robustness

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements for tolerance and RoHS compliance when ordering. Confirm that the commercial grade version meets environmental standards if lead-free materials are required. Ensure the selected part number aligns with the desired reliability level, as screening options referenced to MIL-PRF-19500 may be available separately. Check datasheet notes regarding thermal derating curves for proper PCB footprint implementation.

Single Zener Diodes Selection Notes

Select this component for applications requiring a ruggedized surface mount alternative to axial-leaded diodes. The 5% tolerance designation ensures precise voltage regulation compared to standard commercial variants. Consider the low capacitance profile for high-speed switching or sensitive signal paths. Evaluate the power dissipation limits against the expected ambient temperature and board copper area to maintain safe operating temperatures.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which covers Zener voltages from 2.4 V to 200 V. It serves as the surface mount counterpart to the widely used 1N5221 to 1N5281 JEDEC registered series. The series offers various tolerance options and packaging configurations to support diverse industrial, aerospace, and defense design requirements.

Single Zener Diodes Replacement Considerations

The 1N5222B is the axial-leaded equivalent. For direct surface mount replacement, verify compatibility with the DO-213AA footprint. Commercial equivalents exist but lack the hermetic sealing and radiation hardness attributes.