1N5251B-T

Single Zener Diodes Overview

The Vishay 1N5251B-T is a silicon planar power Zener diode in the 1N5221 to 1N5267 series, housed in a DO-35 (DO-204AH) glass axial package. It provides a nominal Zener voltage of 22 V with a standard tolerance of ±5%. The device operates at a test current of 5.6 mA and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 0.1 µA at 21 V and a typical dynamic resistance of 29 Ω. It supports a junction temperature range from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Features a hermetically sealed glass axial leaded package
• Provides standard ±5% Zener voltage tolerance

Single Zener Diodes Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify that the ordering code suffix matches the required packaging format. Confirm compliance with RoHS directives and material categorization standards as defined by the manufacturer. Ensure the specific batch meets the necessary screening levels for the intended operational environment.

Single Zener Diodes Selection Notes

Select this component when a 22 V reference with ±5% accuracy is required. Consider the 500 mW power dissipation limit and thermal resistance constraints during circuit design. Evaluate the operating temperature range against the application's environmental conditions.

Single Zener Diodes Part Context

This part belongs to the Vishay 1N52xxB series of small signal Zener diodes. The series covers a wide voltage range from 2.4 V to 75 V. Variants are available in different packages such as MiniMELF and SOT-23, offering flexibility for various mounting requirements.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N5251 equivalents. Verify pinout compatibility and ensure the replacement part meets or exceeds the 500 mW power rating and 22 V Zener voltage specifications.

Single Zener Diodes FAQ

What is the dynamic resistance of the 1N5251B-T?

The typical dynamic resistance is 29 Ω at the test current of 5.6 mA.

What is the maximum reverse leakage current?

The maximum reverse leakage current is 0.1 µA when measured at 21 V.