1N5249B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5249B is a single Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 20 V with a tolerance of ±5%. The device has a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +200°C junction temperature. It utilizes the DO-35 axial leaded package, offering a compact form factor for through-hole mounting. Key electrical characteristics include a test current of 11.5 mA and a maximum reverse leakage current of 5 µA at 17 V.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 20 V breakdown voltage.
• Capable of handling up to 500 mW of power dissipation in a standard axial package.
• Operates reliably across an extended junction temperature range from -65°C to +200°C.

Single Zener Diodes Applications

• Voltage reference circuits requiring precise potential levels.
• Overvoltage protection stages in electronic systems.
• General-purpose voltage regulation in low-power designs.

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as multiple vendors produce this JEDEC-standard part number. Confirm that the component meets RoHS compliance requirements if restricted substances are prohibited in your assembly process. Ensure the package type matches the DO-35 specification for proper PCB footprint compatibility during procurement.

Single Zener Diodes Selection Notes

Select this component when a 20 V Zener voltage is required with moderate power handling capabilities. The DO-35 package is suitable for through-hole assembly processes. Consider the ±5% tolerance for applications where tighter voltage precision is not critical. Evaluate the thermal management needs to ensure the 500 mW dissipation limit is not exceeded under operating conditions.

Single Zener Diodes Part Context

The 1N5249B belongs to the widely used 1N52xx series of Zener diodes, which are standardized by JEDEC. This series covers a broad range of voltage values from approximately 2.4 V to 200 V. The 1N5249B specifically targets the 20 V segment, providing a common solution for industrial and consumer electronics that require reliable voltage clamping or referencing.

Single Zener Diodes Replacement Considerations

Equivalent parts include the ON Semiconductor 1N5249B and Microchip 1N5249B. Other manufacturers such as Rectron and Diodes Incorporated also offer compatible replacements with identical electrical specifications and package dimensions.