1N5239BUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5239BUR-1/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 9.1 V and a maximum power dissipation of 0.5 W. It utilizes a hermetically sealed DO-213AA (MELF) package featuring an internal metallurgical bond. The device operates within a junction temperature range of -65°C to +175°C. Electrical characteristics include a test current of 20 mA, a maximum dynamic impedance of 10 Ohms at the test point, and a maximum reverse leakage current of 3 µA. The voltage tolerance for this specific suffix is ±5%, with a positive temperature coefficient of +0.068 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bonding
• Surface mount equivalent to JEDEC registered axial series
• Inherently radiation hard design
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation in broad operating current ranges
• Radiation-hardened electronic systems
• High-reliability surface mount circuit protection

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's nomenclature guide to confirm tolerance levels and RoHS compliance status. Ensure the procurement documentation explicitly references the MIL-PRF-19500 screening requirements if military-grade reliability is required. Confirm that the tape and reel packaging matches EIA-481-B standards for automated assembly integration.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount solution is required for high-reliability applications. The metallurgically bonded construction provides superior stability compared to standard plastic packages. Consider the thermal resistance values and derating curves for proper heat dissipation on FR4 substrates. Verify that the 9.1 V breakdown voltage aligns with the target circuit regulation requirements.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series, which serves as the surface mount counterpart to the traditional axial-leaded 1N5221 through 1N5281 Zener diodes. The series covers a wide voltage range from 2.4 V to 200 V. The 'B' designation indicates a 5% voltage tolerance, while the '-1' suffix denotes the metallurgically bonded surface mount configuration.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' DO-213AA (SOD80/MLL34) packaged Zener diodes with matching 9.1 V ratings and 0.5 W power dissipation. Verify that substitute components meet the same hermetic sealing and radiation hardness specifications if used in critical environments.