SMBJ5946BE3/TR13

Single Zener Diodes Overview

The SMBJ5946BE3/TR13 is a surface-mount 2.0 W Zener diode in the DO-214AA (SMBJ) package, equivalent to JEDEC registered 1N5946. It features a nominal Zener voltage of 75 V with a ±10% tolerance and a maximum dynamic impedance of 140 Ω at IZT = 3.3 mA. The device operates within a junction temperature range of –65 °C to +150 °C, has a thermal resistance of 35 °C/W (junction-to-lead), and includes a Level 1 moisture classification.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features low-profile J-bend design for high-density PCB mounting
• Withstands high surge stresses without sensitivity to ESD per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation circuits requiring robust transient protection
• High-density electronic assemblies utilizing surface-mount technology
• Equipment demanding compliance with MIL-STD-750 ESD standards

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required Zener voltage and tolerance specifications. Confirm RoHS compliance status based on the 'e3' suffix if lead-free plating is mandatory. Ensure the ordering suffix corresponds to tape-and-reel packaging requirements. Cross-reference datasheet electrical characteristics against application load conditions.

Single Zener Diodes Selection Notes

Select this component when a 2.0 W power rating in a compact SMBJ package is necessary. Consider the 140 Ω dynamic impedance for applications sensitive to noise or impedance variations. Evaluate thermal management needs, as derating applies above 80 °C case temperature. Verify compatibility with standard FR4 footprint layouts for DO-214AA packages.

Single Zener Diodes Part Context

This device belongs to the SMBJ59 series of silicon Zener diodes manufactured by Microchip Technology. The family offers higher power ratings compared to axial equivalents due to lower thermal resistance. The SMBJ5946 variant specifically targets the 75 V breakdown region within the broader 5.1 V to 9.1 V product line documentation context.

Single Zener Diodes Replacement Considerations

The SMBJ5946BE3/TR13 is electrically equivalent to the JEDEC registered 1N5946 series. Substitution requires matching the 75 V nominal voltage, ±10% tolerance, and 2.0 W power dissipation capabilities. Verify package compatibility with the DO-214AA form factor.