1N5243BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5243BUR-1 is a surface mount Zener voltage regulator featuring a metallurgically bonded glass DO-213AA (MELF) package. It provides a nominal Zener voltage of 13 V with a ±5% tolerance, tested at a current of 9.0 mA. The device supports a maximum power dissipation of 0.5 W and operates within a junction temperature range of -65 °C to +175 °C. Electrical characteristics include a maximum dynamic impedance of 8.5 Ohms at the test current and a reverse leakage current not exceeding 0.5 µA at 9.9 V.

Single Zener Diodes Feature Summary

• Hermetically sealed surface mount construction utilizing an internal metallurgical bond for reliability.
• Designed as a direct surface mount equivalent to the JEDEC registered 1N5221 through 1N5281 series.
• Inherently radiation hard per Microsemi documentation.

Single Zener Diodes Applications

• Voltage regulation across broad operating current and temperature ranges.
• Applications requiring minimal capacitance characteristics.

Single Zener Diodes Procurement Notes

Verify that the specific part number suffix matches the required voltage tolerance level, as the 'B' designation indicates a standard 5% tolerance. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are available only on commercial grade parts. Ensure the ordering quantity aligns with tape and reel options if automated assembly is utilized.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount solution is required for space-constrained designs. The DO-213AA package offers a metallurgical bond superior to standard epoxy packages. Consider the positive temperature coefficient above 5.6 V when designing circuits sensitive to thermal drift in high-voltage applications.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener regulators. The series covers a wide voltage selection from 2.4 V to 200 V. The BUR-1 designation specifically identifies the metallurgically bonded surface mount variant, distinct from axial-leaded or plastic packaged equivalents.

Single Zener Diodes Replacement Considerations

Direct functional equivalents include other manufacturers' MELF-style Zener diodes rated for 13 V and 500 mW. Verify pinout polarity and physical dimensions against the DO-213AA footprint before substitution.

Single Zener Diodes FAQ

What is the maximum reverse leakage current specified for the 1N5243BUR-1?

The maximum reverse leakage current is 0.5 µA, measured at a reverse voltage of 9.9 V.

How does the 1N5243BUR-1 differ from the standard 1N5243B?

The 1N5243BUR-1 is a surface mount device in a DO-213AA package with a metallurgical bond, whereas the standard 1N5243B is typically an axial-leaded through-hole component.