1N5251BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5251BUR-1 is a surface mount Zener voltage regulator housed in a DO-213AA package. It provides a nominal Zener voltage of 22 V with a test current of 5.6 mA and a maximum power dissipation of 0.5 W. The device features a 5% voltage tolerance, a dynamic impedance of 29 Ohms at the test current, and a temperature coefficient of +0.087 %/°C. Maximum reverse leakage current is specified at 0.1 µA.

Single Zener Diodes Feature Summary

• Hermetically sealed metallurgically bonded glass surface mount package
• Surface mount equivalent to JEDEC registered axial-leaded series
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage generation in electronic circuits
• Protection against voltage transients

Single Zener Diodes Procurement Notes

Verify that the component matches the specific metallurgically bonded glass construction and DO-213AA footprint required for the target application. Confirm RoHS compliance status if environmental regulations apply, as commercial versions may differ from standard specifications. Ensure thermal management aligns with the junction-to-ambient resistance limits provided in the datasheet.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount solution is required to replace traditional axial leads without altering board layout significantly. Consider the positive temperature coefficient suitable for applications above 5 V. Evaluate the low capacitance characteristics if high-speed switching or signal integrity is critical within the circuit design.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which offers a range of Zener voltages from 2.4 V to 200 V. The series serves as a direct surface mount alternative to the widely used JEDEC registered 1N5221 through 1N5281 axial-leaded diodes, maintaining similar electrical performance in a compact form factor.

Single Zener Diodes Replacement Considerations

Direct physical replacement for 1N5251B in DO-35 footprints requires adapter considerations due to the SMD package. Equivalent axial parts include 1N5251B.