SMBJ5945BE3/TR13

Single Zener Diodes Overview

The SMBJ5945BE3/TR13 is a surface mount 2.0 W Zener diode in the DO-214AA (SMBJ) package, equivalent to the JEDEC registered 1N5945 series. It features a nominal Zener voltage of 68 V with a ±5% tolerance. The device operates within a junction temperature range of -65 °C to +150 °C and has a maximum dynamic impedance of 120 Ω at the test current of 3.7 mA. It includes a Level 1 moisture classification requiring no dry pack.

Single Zener Diodes Feature Summary

• Surface mount design in DO-214AA package for high-density mounting
• Equivalent electrical characteristics to axial-lead 1N5945 series
• RoHS compliant matte-tin plating indicated by e3 suffix
• Non-sensitive to ESD per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Protection against high surge stresses
• Applications requiring minimal voltage change versus current variation

Single Zener Diodes Procurement Notes

Verify the specific part number against official Microchip documentation to confirm availability status and manufacturing lifecycle stage. Ensure compliance with RoHS requirements if applicable. Confirm that the TR13 suffix indicates tape and reel packaging as specified in the datasheet nomenclature section before procurement.

Single Zener Diodes Selection Notes

Select this component when a 2.0 W power rating is required in a surface mount form factor. The DO-214AA package offers lower thermal resistance compared to the 1.5 W axial equivalents. Verify that the 68 V nominal voltage and ±5% tolerance align with circuit requirements. Consider the -65 °C to +150 °C operating temperature range for environmental suitability.

Single Zener Diodes Part Context

This device belongs to the SMBJ5918B–SMBJ5924Be3 family of silicon 2.0 Watt Zener diodes manufactured by Microchip Technology. The family provides surface mount alternatives to the JEDEC registered 1N5918 through 1N5956 series, offering higher power ratings due to improved thermal characteristics of the plastic encapsulated package.

Single Zener Diodes Replacement Considerations

The SMBJ5945BE3 is electrically equivalent to the 1N5945 series. For direct replacement, verify pinout compatibility between the DO-214AA surface mount package and the target through-hole or surface mount footprint.