MMBZ5237B

Single Zener Diodes Overview

The onsemi MMBZ5237B is a single Zener diode with an 8.2 V nominal voltage and ±5% tolerance, housed in an SOT-23 surface-mount package. It features a maximum power dissipation of 350 mW at 25°C, a test current of 20 mA, and a dynamic impedance of 8 Ω. The device operates within a junction temperature range up to +150°C and exhibits a maximum reverse leakage current of 6.5 µA at 3.0 V. Forward voltage is limited to 0.9 V at 10 mA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation for low-power circuit applications
• Utilizes compact SOT-23 surface-mount packaging for space-constrained designs
• Features high thermal stability with a maximum junction temperature of +150°C

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection stages
• Biasing networks in analog signal processing

Single Zener Diodes Procurement Notes

Verify the component status as obsolete from Fairchild Semiconductor before procurement planning. Confirm manufacturer lineage through onsemi documentation. Ensure compatibility with existing PCB footprints and soldering profiles. Review datasheet revisions for any electrical characteristic updates prior to final design approval.

Single Zener Diodes Selection Notes

Select this component for applications requiring precise 8.2 V regulation in small form factors. Compare power dissipation limits against thermal constraints. Evaluate leakage current specifications for sensitive low-current environments. Consider alternative packages if higher power handling is required.

Single Zener Diodes Part Context

This device belongs to the MMBZ5221B-MMBZ5257B series of Zener diodes originally published by Fairchild Semiconductor. The series covers a wide range of voltage ratings from 2.4 V to 33 V. The MMBZ5237B specifically addresses the 8.2 V segment with standardized impedance and leakage characteristics typical of the ISOPLANAR™ technology family.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers: MMBZ5237BW-7 (Diodes Incorporated). Verify pinout compatibility and electrical tolerances when substituting.