2N5226

Overview

The onsemi 2N5226 is a silicon unidirectional voltage regulator diode designed for general-purpose applications. It features a nominal Zener voltage of 3.3 V with a power dissipation rating of 0.5 W. The device utilizes a DO-213AA package and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 25 µA, a Zener impedance of 28 Ohms, and a voltage tolerance of ±5%. The component is tested at a current of 20 mA.

Feature Summary

• Provides stable voltage regulation at a nominal 3.3 V level
• Capable of handling 0.5 W power dissipation in a compact form factor
• Engineered for high-temperature operation up to 200°C
• Features low reverse leakage current for efficient standby performance

Applications

• Voltage reference circuits requiring precise 3.3 V levels
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths
• Power supply regulation in industrial control systems

Procurement Notes

Verify the specific manufacturer source, as the 2N5226 designation is historically associated with multiple vendors including Microsemi and Semtech. Confirm that the onsemi variant matches the required DO-213AA package and electrical tolerances. Ensure compliance with RoHS and REACH regulations if applicable to your assembly process. Cross-reference datasheets to confirm pinout and thermal characteristics before finalizing procurement.

Selection Notes

Select this component when a robust 3.3 V Zener diode with high thermal stability is required. The 0.5 W power rating supports moderate current loads compared to lower-power surface-mount alternatives. Consider the through-hole or MELF-style DO-213AA package for applications where mechanical robustness and high-temperature endurance are prioritized over minimal board space. Verify compatibility with existing circuit impedance requirements.

Part Context

The 2N5226 belongs to the standard Zener diode family used for voltage regulation and protection. It serves as a fundamental discrete semiconductor component in analog and digital circuits. The part number follows the JEDEC numbering system for silicon rectifiers and regulators. Variants may exist from different manufacturers, but the core electrical specifications remain consistent across the industry standard.

Replacement Considerations

Direct substitutes include MMSZ5226BT1G (SOD-123 package) and CMHZ5226B (SOD-123 package). For equivalent performance in a similar package, consider MMSZ5226C-E3-08. Verify that replacement parts maintain the 3.3 V Zener voltage and 0.5 W power dissipation ratings.