1N5257

Single Zener Diodes Overview

The Microchip Technology 1N5257 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 33 V with a standard tolerance of 10%. The device operates in the DO-7-2 axial leaded package, suitable for through-hole mounting. Key electrical characteristics include a maximum power dissipation of 500 mW and a test current of 3.8 mA. The component exhibits a maximum reverse leakage current of 100 nA and a Zener impedance of 58 Ohms at the specified test conditions. It supports a wide operating temperature range from -65 °C to +200 °C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single Zener junction configuration
• Constructed with a glass axial-leaded DO-7-2 package for robust mechanical integrity
• Engineered for high stability and reliability in discrete semiconductor circuits

Single Zener Diodes Applications

• General-purpose voltage reference circuits
• Overvoltage protection stages
• Biasing networks in analog signal processing

Single Zener Diodes Procurement Notes

Verify the specific suffix letter (e.g., A, B) associated with the part number to confirm voltage tolerance accuracy, as standard designations may vary between 5% and 10%. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as historical data indicates variations across production runs and regions. Ensure the procurement channel provides valid traceability documentation for quality assurance purposes.

Single Zener Diodes Selection Notes

Select this component when a 33 V reference point is required within a low-power environment limited to 500 mW dissipation. The DO-7-2 package is appropriate for designs utilizing through-hole technology. Consider the 10% tolerance specification against circuit requirements; if tighter precision is necessary, verify availability of variants with stricter tolerance suffixes. Evaluate the thermal resistance and maximum operating temperature limits relative to the ambient conditions of the final assembly.

Single Zener Diodes Part Context

This component belongs to the widely recognized 1N52xx series of 0.5 W Zener diodes manufactured by Microchip Technology. The series offers a broad selection of voltage values ranging from 2.4 V to 200 V. These devices are characterized by low reverse leakage and low Zener impedance, making them suitable for general-purpose regulation tasks. The 1N5257 specifically addresses the 33 V segment of this extensive portfolio.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N5257 equivalents, such as those from Taiwan Semiconductor or SMC, ensuring identical DO-35/DO-7-2 packaging and 33 V / 500 mW specifications. Verify that substitute parts meet the same electrical parameters, including the 58 Ohm impedance and 100 nA leakage current limits.