1N5239B

Single Zener Diodes Overview

The 1N5239B is a single silicon unidirectional Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device supports a maximum power dissipation of 0.5 W and operates within a temperature range of -65 °C to +200 °C. Key electrical characteristics include a test current of 20 mA, a maximum dynamic impedance of 10 Ω, and a reverse leakage current of 3 µA. Standard through-hole packages include DO-35 and DO-7.

Single Zener Diodes Feature Summary

• Provides stable voltage reference using silicon Zener breakdown mechanism
• Capable of handling high junction temperatures up to 200 °C
• Offers low dynamic impedance for consistent regulation under varying currents

Single Zener Diodes Applications

• Voltage reference circuits in precision measurement equipment
• Overvoltage protection stages in power supply inputs
• Clamping applications in signal conditioning paths

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as multiple vendors produce this standard part number. Confirm package style (DO-35 or DO-7) and compliance status (RoHS/lead-free) against project requirements. Ensure the supplier provides valid datasheets confirming the 9.1 V nominal voltage and 0.5 W power rating specifications.

Single Zener Diodes Selection Notes

Select based on required operating temperature range and package constraints. Verify that the 10 Ω dynamic impedance meets circuit sensitivity needs. Check if hermetic sealing is required for harsh environments, as some variants offer ceramic packaging while others use glass encapsulation.

Single Zener Diodes Part Context

This component belongs to the widely used 1N52xx series of Zener diodes. These parts are standardized across manufacturers like Motorola, onsemi, and Microchip. The 1N5239B specifically targets the 9.1 V regulation niche within the general-purpose diode category.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers' 1N5239B listings from sources such as Microchip Technology or onsemi. Verify pinout compatibility and thermal resistance values when substituting between different package styles like DO-35 and DO-7.