SMBJ5939A/TR13

Single Zener Diodes Overview

The SMBJ5939A/TR13 is a surface-mount 2.0W Zener diode in the DO-214AA (SMB) package, equivalent to the JEDEC registered 1N5939. It provides a nominal Zener voltage of 7.5V with a ±5% tolerance. The device features a maximum dynamic impedance of 50.0 Ω at a test current of 66.9 mA and a maximum knee impedance of 400 Ω at 1.0 mA. It supports a maximum regulator current of 266 mA and operates within a junction temperature range of -65°C to +150°C.

Single Zener Diodes Feature Summary

• Surface-mount design in DO-214AA J-bend package for high-density mounting
• Rated at 2.0W power dissipation with low thermal resistance
• Moisture classification Level 1 requiring no dry pack
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Protection against high surge stresses
• Replacement for axial-lead 1N5918–1N5924 series in PCB designs

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR13' indicates tape and reel packaging per EIA-481-1-A standards. Confirm RoHS compliance status as standard devices may vary by plating option. Check for active discontinuance notifications or lifecycle changes directly from Microchip Technology before finalizing procurement plans.

Single Zener Diodes Selection Notes

Select this component when a 2.0W surface-mount Zener diode with 7.5V nominal voltage and tight 5% tolerance is required. Ensure the application allows for adequate heat sinking to maintain junction-to-lead temperatures below 80°C for full power rating utilization. Verify compatibility with the DO-214AA footprint dimensions.

Single Zener Diodes Part Context

This part belongs to the SMBJ59 family of silicon Zener diodes manufactured by Microchip Technology. The family offers voltages from 5.1V to 9.1V and serves as a higher-power alternative to the legacy 1.5W SMS/DO-41 packages. The SMBJ5939A specifically targets applications needing robust voltage reference capabilities in compact surface-mount layouts.

Single Zener Diodes Replacement Considerations

Direct electrical equivalents include the 1N5939B axial-lead diode. For pin-compatible surface-mount replacements, verify that substitute parts meet the 2.0W power rating and DO-214AA package constraints.