1N5222B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5222B is a single silicon unidirectional voltage regulator diode housed in a DO-35 axial glass package. It features a nominal Zener voltage of 2.5 V with a tolerance of ±5% and a maximum power dissipation of 0.5 W. The device operates at a test current of 20 mA, exhibiting a maximum dynamic impedance of 30 Ω and a reverse leakage current of 100 μA at 1 V. It supports an operating temperature range from -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation for low-voltage reference applications
• Features low reverse leakage current for improved circuit efficiency
• Offers high stability and reliability through robust glass encapsulation

Single Zener Diodes Applications

• Voltage reference circuits requiring precise low-voltage levels
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify the manufacturer origin carefully, as the 1N5222B part number is widely produced by multiple vendors including Microchip Technology and onsemi following industry acquisitions. Confirm that the specific batch matches the required lead-free or tin-lead termination specifications. Ensure the DO-35 package dimensions align with your PCB footprint requirements before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a standard 2.5 V reference is needed in a through-hole axial configuration. Consider the ±5% tolerance and 30 Ω impedance limits against your circuit's precision requirements. Evaluate the thermal management needs given the 0.5 W power rating and ensure the operating environment stays within the specified -65°C to +200°C junction temperature range.

Single Zener Diodes Part Context

This device belongs to the 1N52-series family of Zener diodes, known for low impedance and high reliability. Originally associated with Fairchild Semiconductor, production rights and inventory have transitioned through corporate mergers involving onsemi and Microchip Technology. The DO-35 package remains a standard form factor for general-purpose discrete semiconductor applications.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N5222B manufactured by Microchip Technology and onsemi. Equivalent generic replacements such as the 1N5222 (±10% tolerance) may be used if tighter voltage accuracy is not critical. Verify pinout compatibility and package dimensions when swapping between different manufacturers.