1N5251B

Single Zener Diodes Overview

The onsemi 1N5251B is a single silicon Zener diode housed in an axial lead DO-35 (DO-204AH) glass package. It provides a nominal Zener voltage of 22 V with a tolerance of ±5%. The device dissipates up to 500 mW at 25°C, derating by 4.0 mW/°C above this temperature. Electrical characteristics include a maximum dynamic impedance of 29 Ohms at a test current of 5.6 mA and a maximum reverse leakage current of 100 nA at 17 V. The component operates within a junction temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation through avalanche breakdown in a hermetically sealed glass axial package.
• Features low reverse leakage current for efficient operation in high-impedance circuits.
• Designed for robust thermal performance with a wide operating junction temperature range.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages in electronic systems.
• Clamping applications to limit signal amplitudes.

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging format, as bulk bags and tape-and-reel options exist within the series. Confirm RoHS compliance status and lead-free availability requirements prior to procurement, as manufacturing specifications may vary by production site and date code.

Single Zener Diodes Selection Notes

Select this component when a 22 V regulation point is required with tight tolerance constraints. Ensure the circuit design accommodates the 500 mW power dissipation limit and the specified thermal derating curve. Verify that the 29 Ohm dynamic impedance meets the ripple rejection requirements of the target application.

Single Zener Diodes Part Context

This part belongs to the 1N5221B–1N5252B series of 0.5 W Zener diodes manufactured by onsemi. The series covers a voltage range from 2.4 V to 24 V, utilizing standard 5% tolerance markings. These components are widely used in general-purpose discrete semiconductor applications requiring reliable voltage stabilization.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N5251B equivalents or the broader 1N52xxB series if voltage matching is sufficient. Verify pinout compatibility and package dimensions before substitution to ensure mechanical fit.