SZMMBZ6V2ALT1G

Overview

The SZMMBZ6V2ALT1G is a dual monolithic silicon Zener diode in an SOT-23 package, designed for transient overvoltage and ESD protection. It features a dual common anode configuration protecting two separate lines within one component. The device operates with a working peak reverse voltage of 3 V and a maximum reverse leakage current of 0.5 nA at VRWM. Breakdown voltage ranges from 5.89 V to 6.51 V at a test current of 1.0 mA. It withstands a clamping voltage of 8.7 V at a peak pulse current of 2.76 A, delivering 24 W peak power dissipation. The junction temperature range spans from -55 °C to +150 °C.

Feature Summary

• Dual common anode design enables protection of two independent signal lines using a single compact package.
• Configurable as either two separate unidirectional channels or a single bidirectional channel depending on circuit topology.
• Qualified for automotive applications under AEC-Q101 standards with PPAP capability.

Applications

• Protection of I/O ports in computers and business machines
• ESD suppression for communication systems and printers
• Transient voltage protection in medical equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details and compliance status. Ensure that the selected variant matches the required automotive qualification level if the application demands AEC-Q101 certification. Cross-reference the part number with the latest datasheet revision to confirm pinout compatibility and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when board space is limited and dual-line protection is required. The SOT-23 package offers a low profile suitable for high-density surface mount assemblies. Consider the 24 W peak power rating for handling standard ESD events. Verify that the 3 V working voltage aligns with the operational limits of the protected circuitry to prevent unintended conduction during normal operation.

Part Context

This device belongs to the MMBZxxxALT1G and SZMMBZxxxALT1G series of dual Zener diodes. The SZ prefix specifically denotes parts manufactured under unique site and control change requirements, distinguishing them from the standard MMBZ series while sharing identical electrical performance and mechanical specifications.

Replacement Considerations

The MMBZ6V2ALT1G serves as a direct functional substitute with identical electrical parameters. However, it lacks the automotive-specific manufacturing controls associated with the SZ prefix. For non-automotive designs, the MMBZ6V2ALT1G provides equivalent protection capabilities in the same SOT-23 package.

FAQ

How does the dual common anode configuration function?

The device contains two independent Zener junctions sharing a common anode terminal (Pin 3). This allows each cathode (Pins 1 and 2) to protect a separate line relative to ground or a common reference point.

What is the ESD protection rating of this component?

The component meets IEC61000-4-2 Level 4 standards with ±30 kV contact discharge protection. It also complies with Human Body Model Class 3 (>16 kV) and Machine Model Class C (>400 V).

Can this device be used as a bidirectional protector?

Yes, by connecting the two cathodes together and using the common anode as one terminal, the device functions as a single bidirectional TVS diode for AC or differential line protection.