SMPZ3931B-M3/84A

Single Zener Diodes Overview

The SMPZ3931B-M3/84A is a surface mount power voltage-regulating diode from the Vishay eSMP series, housed in an SMP (DO-220AA) package. It provides a nominal Zener voltage of 18 V with a range of 17.1 V to 18.9 V at a test current of 0.25 mA. The device features low Zener impedance and leakage current, suitable for general purpose regulation. Maximum DC Zener current is 83 mA, with a maximum reverse leakage current of 0.5 µA at 13.7 V. Power dissipation reaches 1500 mW at 75 °C lead temperature.

Single Zener Diodes Feature Summary

• Very low profile construction typical of 1.0 mm height
• Low Zener impedance and low regulation factor
• Meets MSL level 1 per J-STD-020 standards
• Halogen-free, RoHS-compliant industrial grade

Single Zener Diodes Applications

• General purpose voltage regulation
• Industrial circuit protection
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify component authenticity by checking the manufacturer's datasheet revision date and document number against official records. Confirm the ordering suffix matches the requested tape and reel configuration. Ensure compliance with material categorization definitions provided in the documentation. Validate that the specific part number corresponds to the intended electrical characteristics before procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring stable voltage regulation in compact designs. The SMP package supports automated placement processes efficiently. Consider thermal derating curves when determining power dissipation limits under varying ambient temperatures. Verify that the required Zener voltage falls within the specified tolerance range for the target application.

Single Zener Diodes Part Context

This device belongs to the SMPZ39XB series of surface mount power voltage-regulating diodes manufactured by Vishay General Semiconductor. The series covers a wide range of Zener voltages from 5.6 V to 43 V. All parts share the same mechanical footprint and feature set, differing primarily in their specific breakdown voltage specifications and corresponding test currents.

Single Zener Diodes Replacement Considerations

Direct substitutes include other SMPZ3931B variants from Vishay or equivalent Zener diodes in DO-220AA packages with matching 18 V nominal voltage and similar power dissipation ratings. Verify pinout compatibility and thermal resistance characteristics when considering cross-manufacturer alternatives.