1N5257B

Single Zener Diodes Overview

The SMC Diode Solutions 1N5257B is a silicon unidirectional voltage regulator diode housed in a DO-35 glass axial lead package. It features a nominal Zener voltage of 33 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a temperature range of -65 °C to +200 °C. Key electrical characteristics include a maximum dynamic impedance of 58 Ω, a test current of 3.8 mA, and a maximum reverse leakage current of 100 nA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single silicon junction structure
• Utilizes a hermetically sealed glass case for environmental protection
• Offers low Zener impedance for consistent performance under varying loads

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• Clamping applications for signal conditioning

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation when sourcing, as the 1N5257B part number is utilized by multiple semiconductor producers including SMC Diode Solutions, Vishay, and others. Confirm that the component matches the required DO-35 package dimensions and lead configuration. Ensure the selected unit meets the necessary thermal and electrical specifications for the intended operating environment before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component for through-hole designs requiring a 33 V regulation point. The DO-35 package is suitable for general-purpose circuit boards where axial mounting is preferred. Consider the 5% voltage tolerance and 500 mW power rating to ensure adequate margin for the specific application load conditions and ambient temperature constraints.

Single Zener Diodes Part Context

This component belongs to the standard 1N52xx series of 0.5 W Zener diodes. The 'B' suffix typically denotes a ±5% voltage tolerance, distinguishing it from other variants with different precision levels. The series provides a wide selection of voltage values within the same physical footprint, facilitating standardized inventory management across various electronic product lines.

Single Zener Diodes Replacement Considerations

Direct substitutes include the Vishay 1N5257B/D7 and the Microsemi MSP1N5257-1. These alternatives share identical electrical ratings and the DO-35 package form factor, allowing for pin-compatible integration without modifying the existing circuit layout or board design.