1N5257B

Single Zener Diodes Overview

The onsemi 1N5257B is a single-channel silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 33 V with a tight tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a temperature range from -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. It is housed in a DO-35 axial through-hole package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 33 V reference point
• Ensures high reliability and stability suitable for precision circuits
• Features low reverse leakage current for efficient operation
• Offers low Zener impedance to maintain consistent performance under varying loads

Single Zener Diodes Applications

• Voltage reference sources in electronic circuits
• Overvoltage protection for sensitive components
• Clamping applications in signal processing
• General-purpose voltage regulation in industrial equipment

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N5257B designation is used by multiple vendors including onsemi, Taiwan Semiconductor, and others. Confirm that the component matches the required DO-35 through-hole package and 500 mW power rating. Ensure the ±5% tolerance aligns with design specifications. Check RoHS compliance status if environmental regulations apply to the final assembly. Validate the datasheet revision to ensure parameter accuracy.

Single Zener Diodes Selection Notes

Select this component when a precise 33 V reference is required in a through-hole configuration. The 500 mW power rating allows for moderate current handling without excessive heat generation. The wide operating temperature range makes it suitable for harsh environments. Consider the 58 Ohm impedance for dynamic load requirements. Compare against surface-mount alternatives like MMSZ5257B if board space is limited.

Single Zener Diodes Part Context

The 1N5257B belongs to the standard 1N52xx series of Zener diodes, widely recognized for their reliability in discrete semiconductor applications. This series is commonly utilized in consumer electronics, automotive systems, and industrial control panels. The DO-35 package provides mechanical robustness and ease of manual or automated insertion into printed circuit boards.

Single Zener Diodes Replacement Considerations

Equivalent parts include the MMSZ5257B (surface mount variant) and generic 1N5257B units from other manufacturers such as Fairchild or NXP. Verify pin compatibility and thermal resistance when substituting. Ensure the replacement maintains the same 33 V nominal voltage and 500 mW power dissipation capabilities.