1N5257B-T

Single Zener Diodes Overview

The Vishay 1N5257B-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 33 V with a ±5% tolerance and a maximum power dissipation of 500 mW at thermal equilibrium. The device operates with a test current of 3.8 mA and features a typical dynamic resistance of 58 Ω. It supports a junction temperature up to 175 °C and a storage range from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Utilizes silicon planar technology for robust voltage regulation
• Provides stable reference voltage within a tight ±5% tolerance band
• Constructed in a hermetically sealed glass axial leaded package

Single Zener Diodes Applications

• Voltage stabilization circuits
• General-purpose voltage reference applications

Single Zener Diodes Procurement Notes

Verify that the ordering code includes the specific suffix indicating tape-and-reel packaging. Confirm compliance with RoHS directives and material categorization standards as defined by the manufacturer. Ensure the requested quantity aligns with standard reel or box minimum order requirements specified in the ordering information table.

Single Zener Diodes Selection Notes

Select this component when a 33 V reference point is required in through-hole designs. The ±5% tolerance suits general applications where high precision is not critical. Consider the 500 mW power rating and thermal resistance characteristics to ensure adequate heat dissipation under continuous operating conditions.

Single Zener Diodes Part Context

This part belongs to the Vishay 1N5221 to 1N5267 family 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 including MiniMELF, SOT-23, and SOD-123, offering flexibility for various mounting styles while maintaining consistent electrical performance profiles across the lineup.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N5257B equivalents. Verify that substitute parts match the 33 V nominal voltage, 500 mW power rating, and DO-35 package dimensions to ensure mechanical and electrical compatibility.