1N5231

Single Zener Diodes Overview

The SMC Diode Solutions 1N5231 is a general-purpose silicon Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 5.1 V with a maximum power dissipation of 500 mW. The device is available in multiple package configurations, including the axial DO-35 through-hole package and the surface-mount SOD-123 form factor. Key electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 17 Ω, and a maximum reverse leakage current of 5 µA at 2 V. Tolerances vary by suffix, typically offering ±5% or ±2% accuracy.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using a single unidirectional silicon junction
• Available in both through-hole and surface-mount package options for flexible PCB integration
• Engineered for low leakage current operation to maintain efficiency in standby states
• Features robust thermal performance suitable for standard industrial operating temperatures

Single Zener Diodes Applications

• General voltage regulation circuits
• Voltage reference sources in analog systems
• Overvoltage protection stages
• Clipping and clamping applications

Single Zener Diodes Procurement Notes

Verify the specific tolerance suffix (e.g., B for ±5%, CTR for ±2%) as this affects precision requirements. Confirm the package type matches the target assembly process, whether axial leaded or surface mount. Ensure the selected variant meets the required operating temperature range and compliance standards such as RoHS before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select the 1N5231 when a precise 5.1 V reference is needed with moderate power handling capabilities. Choose the SOD-123 variant for space-constrained surface-mount designs and the DO-35 version for through-hole prototyping. Consider the impedance and leakage specifications if the application demands high stability under varying load conditions or minimal quiescent current draw.

Single Zener Diodes Part Context

This component belongs to the widely used 1N52xx series of Zener diodes, which are industry-standard parts for basic voltage regulation tasks. The 1N5231 specifically targets the 5.1 V segment, a common reference level in digital logic interfaces and sensor biasing networks. Its availability from multiple manufacturers ensures supply chain flexibility across different electronic manufacturing sectors.

Single Zener Diodes Replacement Considerations

Direct substitutes include the MMSZ5231B from SMC Diode Solutions in the SOD-123 package. Other compatible equivalents are the 1N5231B from onsemi in the DO-35 package and the 1N5231B-TP from Micro Commercial Components. Verify that any replacement maintains the same 5.1 V nominal voltage and 500 mW power rating.