SZMMBZ5V6ALT1G

Overview

The SZMMBZ5V6ALT1G is a dual monolithic silicon Zener transient voltage suppressor in an SOT-23 package. It features a common anode design to protect two separate lines within one component. The device has a working peak reverse voltage of 3.0 V and a nominal breakdown voltage of 5.6 V. It handles a peak pulse power of 24 W at 1.0 ms with a maximum clamping voltage of 8.0 V at 3.0 A peak pulse current. Reverse leakage is less than 5.0 µA at the working voltage. It meets IEC61000-4-2 Level 4 ESD standards, offering ±30 kV contact discharge protection.

Feature Summary

• Dual junction common anode configuration protects two independent signal lines using a single compact package.
• SZ prefix indicates qualification to AEC-Q101 standards and PPAP capability for automotive applications.
• Provides robust electrostatic discharge protection rated at ±30 kV contact discharge per IEC61000-4-4.
• Constructed with void-free transfer-molded thermosetting plastic and corrosion-resistant solderable finish.

Applications

• Protection of computer interface buses such as data, address, and control lines.
• ESD suppression for printer terminals and business machine input/output ports.
• Voltage regulation and transient protection in medical equipment circuits.
• Guarding microprocessor I/O pins against overvoltage events in embedded systems.

Procurement Notes

Verify the specific ordering suffix to confirm packaging format. The T1 suffix denotes an 8 mm tape and reel containing 3,000 units. Confirm that the SZ prefix is required if the application demands unique site identification or specific control change notifications mandated by automotive quality standards. Ensure compliance with RoHS directives for environmental regulations.

Selection Notes

Select this component when board space is limited and dual-line protection is necessary. The common anode topology allows flexible unidirectional or bidirectional configurations. Verify that the 3.0 V working voltage aligns with the protected circuit's operating range. Consider the 24 W peak power rating for transient energy absorption requirements in standard FR-5 board environments.

Part Context

This part belongs to the MMBZxxxALT1G series of dual common anode Zeners. The SZ prefix specifically identifies devices qualified for automotive use under AEC-Q101 standards. It shares the same mechanical footprint and electrical characteristics as the standard MMBZ5V6ALT1G but includes additional manufacturing controls for supply chain traceability.

Replacement Considerations

The MMBZ5V6ALT1G serves as a direct functional substitute with identical pinout and specifications. However, it lacks the automotive-specific site controls associated with the SZ prefix. For non-automotive designs requiring the same electrical performance, the MMBZ5V6ALT1G is a compatible alternative.

FAQ

How does the common anode design benefit PCB layout?

The common anode structure allows the protection of two separate signal lines using a single package, which significantly reduces component count and saves valuable board space in high-density designs.

What is the difference between the SZ and MMBZ prefixes?

The SZ prefix indicates that the device is qualified to AEC-Q101 standards and is PPAP capable, making it suitable for automotive applications requiring unique site and control change notifications.

Can this device be used in bidirectional configurations?

Yes, the SOT-23 package allows for either two separate unidirectional configurations or a single bidirectional configuration depending on how the pins are connected in the circuit.