1N5257B

Single Zener Diodes Overview

The Microchip Technology 1N5257B is a single silicon voltage regulator diode housed in a DO-35 axial through-hole package. It provides a nominal Zener voltage of 33 V with a tolerance of ±5%. The device dissipates up to 500 mW of power and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 58 Ohms, and a test current of 3.8 mA.

Single Zener Diodes Feature Summary

• Maintains stable reference voltage under varying load conditions
• Features low dynamic impedance for consistent regulation performance
• Designed for high reliability in through-hole circuit applications

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection stages
• Power supply regulation modules

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation, as the 1N5257B part number is historically associated with multiple vendors including Philips/NXP and SMC. Confirm that the supplied component matches the required electrical specifications and package style. Ensure compliance with project-specific material restrictions before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a precise 33 V regulation point is required in a standard axial leaded form factor. Consider the 5% tolerance and 500 mW power rating against circuit demands. Evaluate the operating temperature range to ensure suitability for the intended environmental conditions.

Single Zener Diodes Part Context

This component belongs to the widely recognized 1N52xx series of Zener diodes. These devices are standard industry references for low-power voltage regulation. The 1N5257B specifically targets the 33 V segment of this extensive lineup, offering a reliable solution for general-purpose electronic designs requiring stable DC voltage levels.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the 1N5257BTA from SMC and generic equivalents from other manufacturers. Verify pinout compatibility and thermal resistance values when replacing units from different production sources.