MMBZ33VALT1 Equivalent & Substitute Parts

Part Overview

The MMBZ33VALT1 is a transient voltage suppressor (TVS) zener diode in SOT-23 packaging, rated for 40W peak pulse power with a 33V nominal specification. This component is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The obsolete status requires sourcing from alternative active product lines to ensure long-term supply chain continuity and compliance with current manufacturing standards.

Substiute Parts

MMBZ33VALT1

onsemiIn Stock: 868MMBZ33VALT1 Datasheet

Current PartRFQ

MMBZ33VALT1G

onsemiIn Stock: 305300MMBZ33VALT1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MMBZ33VALT1G qualifies as a direct substitute based on the following alignment criteria:

• Manufacturer: Same source (onsemi)
• Package: Identical SOT-23-3 (TO-236) form factor
• Power Rating: Matching 40W peak pulse specification
• Voltage Class: 26V reverse standoff with 31.35V minimum breakdown and 46V maximum clamping—functionally equivalent to the 33V nominal class
• Unidirectional Channels: Both devices feature dual channel configuration
• Mounting Type: Surface mount compatibility maintained
• MSL Rating: Identical MSL 1 classification
• Product Status: MMBZ33VALT1G is active, ensuring ongoing availability

The electrical parameters of the substitute part fall within the operational envelope required for 33V-class TVS applications, with clamping voltage and peak pulse current specifications suitable for transient suppression in the same circuit topologies.

Parameter Comparison

Engineering Selection Recommendations

The MMBZ33VALT1G is the qualified substitute for the obsolete MMBZ33VALT1. Selection of the active part is driven by:

• Product Status: The substitute part maintains active manufacturing status, eliminating supply chain risk associated with obsolete components.
• Regulatory Compliance: MMBZ33VALT1G achieves ROHS3 compliance, meeting current environmental and manufacturing directives, whereas the original part does not.
• Functional Equivalence: Electrical specifications—power rating, voltage class, channel configuration, and package form factor—are directly compatible with existing circuit designs.
• Certification Alignment: Both parts share identical REACH and ECCN classifications, maintaining export and regulatory consistency.

For new designs and production transitions, MMBZ33VALT1G is the appropriate selection. For legacy systems requiring the exact obsolete part, component-level testing and validation are necessary to confirm functional compatibility before substitution.

Frequently Asked Questions (FAQ)

Q: Can MMBZ33VALT1G be used as a direct replacement in existing designs?

A: Yes. The substitute part maintains identical package geometry (SOT-23-3), power rating (40W), channel configuration (dual), and voltage class specifications. No PCB layout modifications are required.

Q: What is the primary reason for substitution?

A: The MMBZ33VALT1 is obsolete. The MMBZ33VALT1G is the active equivalent from the same manufacturer, ensuring continued supply and compliance with current manufacturing standards.

Q: Are there compliance differences between the two parts?

A: Yes. MMBZ33VALT1G is ROHS3 compliant, while MMBZ33VALT1 is non-compliant. Both parts maintain identical REACH and ECCN classifications. For applications subject to RoHS requirements, MMBZ33VALT1G is mandatory.

Q: Do the electrical specifications differ?

A: The substitute part provides detailed electrical specifications (26V reverse standoff, 31.35V minimum breakdown, 46V clamping, 870mA peak pulse current, -55°C to 150°C operating range) that align with the 33V nominal voltage class of the original part. These parameters are functionally equivalent for transient suppression applications.

Q: Is the packaging identical?

A: Yes. Both parts use SOT-23-3 (TO-236) surface mount packaging. Reel and tape configurations are available for the substitute part, supporting automated assembly processes.

Q: What is the MSL rating for the substitute part?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity constraints for storage or handling.