MMBZ27VALT1 Equivalent & Substitute Parts

Part Overview

The MMBZ27VALT1 is a dual-channel Transient Voltage Suppressor (TVS) diode manufactured by onsemi, rated for 40W peak pulse power at 27V clamping voltage in a SOT-23 surface mount package. This component is classified as obsolete and is no longer in active production. Finding equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

MMBZ27VALT1

onsemiIn Stock: 7243MMBZ27VALT1 Datasheet

Current PartRFQ

MMBZ27VALT1G

onsemiIn Stock: 671884MMBZ27VALT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MMBZ27VALT1G qualifies as a direct substitute based on the following critical parameters:

• Base product number match: Both parts share the MMBZ27 base designation
• Manufacturer continuity: Both manufactured by onsemi
• Package compatibility: Both use SOT-23-3 (TO-236) surface mount package
• Electrical rating alignment: 40W peak pulse power rating maintained
• Voltage class: Both operate in the 22-27V reverse standoff range
• Dual-channel configuration: Both feature 2 unidirectional channels
• Compliance improvement: Substitute is RoHS3 compliant (vs. non-compliant original)
• MSL rating: Identical MSL 1 (Unlimited) moisture sensitivity level

Parameter Comparison

Engineering Selection Recommendations

The MMBZ27VALT1G is the qualified substitute for the obsolete MMBZ27VALT1. Selection is based on:

• Product status: The substitute is in active production, ensuring long-term availability and supply chain stability
• Regulatory compliance: The MMBZ27VALT1G achieves RoHS3 compliance, meeting current environmental and regulatory requirements
• Electrical equivalence: Matching 40W power rating and dual-channel configuration maintain circuit performance
• Package compatibility: Identical SOT-23-3 footprint ensures direct PCB layout compatibility without redesign
• Certification alignment: Both parts maintain REACH Unaffected and identical MSL ratings

Frequently Asked Questions (FAQ)

Q: Can MMBZ27VALT1G be used as a direct replacement for MMBZ27VALT1 on existing PCBs?

A: Yes. Both parts use the identical SOT-23-3 (TO-236) surface mount package with matching pinout and footprint. No PCB layout modifications are required.

Q: What is the difference in reverse standoff voltage between the two parts?

A: The MMBZ27VALT1 is rated at 27V reverse standoff, while the MMBZ27VALT1G is rated at 22V. Both maintain a 40V maximum clamping voltage, making them functionally equivalent for transient suppression applications within these voltage ranges.

Q: Is the MMBZ27VALT1G RoHS compliant?

A: Yes. The MMBZ27VALT1G is RoHS3 compliant, whereas the original MMBZ27VALT1 is RoHS non-compliant. This makes the substitute suitable for applications requiring environmental compliance.

Q: Are there any thermal or operating temperature differences?

A: The MMBZ27VALT1G is specified for -55°C to 150°C junction temperature operation. The original part does not provide this specification in the available data.

Q: What is the moisture sensitivity level for both parts?

A: Both parts carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can I use MMBZ27VALT1G in new designs?

A: Yes. The MMBZ27VALT1G is in active production status and is the recommended choice for new designs requiring a dual-channel 40W TVS diode in SOT-23 packaging.