MMBZ5256B-7-F

Single Zener Diodes Overview

The MMBZ5256B-7-F is a surface mount Zener diode manufactured by Diodes Incorporated, featuring planar die construction within an SOT23 package. It provides a nominal Zener voltage of 30 V with a tolerance range of 28.50 V to 31.50 V at a test current of 4.2 mA. The device supports a maximum power dissipation of 350 mW on an FR-4 PCB and exhibits a maximum Zener impedance of 49 Ω at the test current. Maximum reverse leakage current is specified as 0.1 µA at 23 V. Operating and storage temperatures range from -65 °C to +150 °C.

Single Zener Diodes Feature Summary

• Planar die construction for high reliability
• Totally lead-free and fully RoHS compliant
• Halogen and antimony free green device
• Ideally suited for automated assembly processes

Single Zener Diodes Applications

• Automotive applications requiring specific change control
• High reliability electronic circuits
• Voltage regulation in surface mount designs

Single Zener Diodes Procurement Notes

Verify the complete part number against official documentation to ensure correct voltage rating and packaging configuration. Confirm compliance requirements such as RoHS and halogen-free status match project specifications. Check for automotive grade alternatives if AEC-Q qualification or IATF 16949 manufacturing is required. Validate thermal resistance and power derating curves for the intended PCB layout.

Single Zener Diodes Selection Notes

Select this component when a 30 V Zener reference is needed in a compact SOT23 footprint. Ensure the circuit design accommodates the 350 mW power dissipation limit at the expected ambient temperature. Verify that the 49 Ω impedance meets noise and stability requirements. Consider the -65 °C to +150 °C operating range for environmental suitability.

Single Zener Diodes Part Context

This device belongs to the MMBZ5221B through MMBZ5259B series of 350 mW surface mount Zener diodes. The series offers various voltage options from 2.4 V to 39 V in the same SOT23 package. The -7-F suffix indicates standard tape and reel packaging containing 3,000 devices per carrier.

Single Zener Diodes Replacement Considerations

Cross-reference other manufacturers' SOT23 Zener diodes with 30 V nominal voltage and similar power ratings. Verify pinout compatibility and electrical characteristics including impedance and leakage current before substitution.

Single Zener Diodes FAQ

What is the maximum reverse leakage current for the MMBZ5256B-7-F?

The maximum reverse leakage current is 0.1 µA when measured at 23 V.

Is the MMBZ5256B-7-F suitable for automotive applications?

Standard versions are not explicitly qualified for automotive use. For automotive applications requiring specific change control, refer to the related automotive grade parts with the Q-suffix.