1N5249B

Single Zener Diodes Overview

The SMC Diode Solutions 1N5249B is a single Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 19 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range of -55°C to +150°C. Key electrical characteristics include a maximum reverse leakage current of 100 nA at 14 V and a Zener impedance of 23 Ohms. It is housed in an axial DO-35 package suitable for through-hole mounting.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 19 V breakdown voltage
• Capable of handling up to 500 mW power dissipation
• Low reverse leakage current ensures minimal standby power loss
• Robust construction allows operation across extended temperature ranges

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• Clamping applications for signal line stabilization

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the 1N5249B designation is utilized by multiple producers including onsemi and Micro Commercial Components. Confirm that the sourced component matches the required DO-35 axial package and 500 mW power rating. Ensure compliance with relevant environmental standards such as RoHS if mandated by the design specifications before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a standard 19 V Zener voltage is required in a through-hole configuration. Consider the 500 mW power rating against expected thermal conditions and ensure the ±5% tolerance aligns with circuit precision requirements. Verify that the axial lead form factor fits the available board space and mounting constraints.

Single Zener Diodes Part Context

The 1N5249B belongs to the widely recognized 1N52xx series of glass-passivated Zener diodes. This series is established for general-purpose voltage regulation tasks. The part utilizes a DO-35 axial package, which facilitates easy insertion into printed circuit boards using standard through-hole assembly techniques common in legacy and industrial electronics.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N5249B TR PBFREE from Central Semiconductor Corp. Alternative options encompass the 1N5249A from Microchip Technology and the 1N5539B from Microchip Technology, though these may differ in specific tolerances or manufacturing origins.