1N5239B

Single Zener Diodes Overview

The onsemi 1N5239B is a single-channel general-purpose Zener voltage regulator diode housed in an axial-lead DO-35 (DO-204AH) glass package. It provides a nominal Zener voltage of 9.1 V with a tolerance of ±5%, operating within a range of 8.645 V to 9.555 V at a test current of 20 mA. The device supports a maximum power dissipation of 500 mW and features a typical voltage temperature coefficient of 0.068 %/°C. Electrical characteristics include a maximum dynamic impedance of 10 Ω, a knee impedance of 600 Ω, and a maximum reverse leakage current of 3 μA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction utilizing silicon-oxide passivated junctions for environmental protection
• Metallurgical bonded double slug type construction ensuring robust mechanical stability
• ESD rating of Class 3 exceeding 16 kV per the Human Body Model

Single Zener Diodes Applications

• Voltage regulation circuits requiring stable reference levels
• Overvoltage protection stages in electronic systems
• Clamping applications for transient suppression

Single Zener Diodes Procurement Notes

Verify that the ordered component matches the specific manufacturer designation and package style required for your assembly process. Confirm compliance with RoHS and halogen-free standards if mandated by your design specifications. Ensure the ordering suffix aligns with the desired shipping format, such as bulk bags or tape and reel configurations, prior to finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a precise 9.1 V reference is needed within a tight tolerance band. The low dynamic impedance ensures effective regulation under varying load conditions. Verify that the thermal management strategy accommodates the 500 mW dissipation limit and the derating requirements above 50°C to maintain reliability across the specified temperature range.

Single Zener Diodes Part Context

This part belongs to the 1N5221B through 1N5252B series of Zener diodes manufactured by onsemi. The series offers a wide voltage range from 2.4 V to 91 V in the same compact axial-lead package. These devices are designed for general-purpose applications where reliable voltage regulation and robust physical construction are primary requirements.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the 1N5239BTR variant from onsemi, which shares identical electrical specifications but utilizes tape and reel packaging instead of bulk bags. Other manufacturers producing standard 1N5239B parts may be considered provided their datasheets confirm matching voltage tolerances and impedance values.