P6SMB39AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB39AT3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 600W peak pulse power with a 39V clamping specification in SMB package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The part is RoHS non-compliant and carries unlimited moisture sensitivity level (MSL 1), suitable for general transient voltage protection applications.

Substiute Parts

P6SMB39AT3

onsemiIn Stock: 3431P6SMB39AT3 Datasheet

Current PartRFQ

P6SMB39A

Eaton - Electronics DivisionIn Stock: 4493P6SMB39A Datasheet

SimilarRFQ

P6SMB39A-AU_R2_000A1

Panjit International Inc.In Stock: 1186P6SMB39A-AU_R2_000A1 Datasheet

SimilarRFQ

PTVS33VP1UP,115

Nexperia USA Inc.In Stock: 92623PTVS33VP1UP,115 Datasheet

SimilarRFQ

SM6T39A

STMicroelectronicsIn Stock: 6547SM6T39A Datasheet

SimilarRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

SimilarRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

SimilarRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P6SMB39AT3 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 33V to 33.3V range
• Voltage - Clamping (Max) @ Ipp: 53.3V to 69.7V range
• Current - Peak Pulse (10/1000µs): 11.2A to 57A
• Power - Peak Pulse: 600W
• Package / Case: SMB (DO-214AA) or equivalent surface mount package
• Type: Zener, Unidirectional
• Unidirectional Channels: 1
• Operating Temperature: -55°C ~ 150°C

The substitute parts listed maintain electrical compatibility within the specified voltage and current parameters while offering active product status and improved compliance profiles. Package compatibility includes SMB (DO-214AA) and SOD-128 variants, both suitable for surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status, ensuring long-term availability and manufacturing support. The primary distinction among substitutes is compliance certification and package format:

RoHS Compliant Substitutes (Recommended for New Designs):

• P6SMB39A (Eaton) - RoHS Compliant, SMB package, 11.3A peak pulse current
• P6SMB39A-AU_R2_000A1 (Panjit) - ROHS3 Compliant, AEC-Q101 automotive qualified, SMB package, 11.2A peak pulse current
• PTVS33VP1UP,115 (Nexperia) - ROHS3 Compliant, AEC-Q101 automotive qualified, SOD-128 package, 11.3A peak pulse current
• SM6T39A (STMicroelectronics) - ROHS3 Compliant, SMB package, 57A peak pulse current (8/20µs)
• SMBJ33A (Good-Ark) - ROHS3 Compliant, SMB package, 11.3A peak pulse current

For applications requiring automotive qualification, P6SMB39A-AU_R2_000A1 and PTVS33VP1UP,115 carry AEC-Q101 certification. The SM6T39A variant offers significantly higher peak pulse current (57A) compared to other substitutes, suitable for applications requiring enhanced transient suppression capability. Package selection between SMB (DO-214AA) and SOD-128 depends on PCB layout constraints and assembly equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Can P6SMB39AT3 be directly replaced with any of the listed substitutes?

A: Direct replacement is possible for parts sharing the SMB (DO-214AA) package format: P6SMB39A, P6SMB39A-AU_R2_000A1, SM6T39A, and SMBJ33A. The PTVS33VP1UP,115 uses SOD-128 package and requires PCB layout modification. All substitutes maintain the same 600W peak pulse power rating and compatible voltage clamping characteristics.

Q: What is the difference between the clamping voltage specifications across substitutes?

A: The P6SMB39AT3 specifies 39V clamping, while substitutes range from 53.3V to 69.7V. This variation reflects different manufacturer design approaches for the same voltage class. All substitutes operate within the 33V to 33.3V reverse standoff voltage range, ensuring functional compatibility for transient suppression in the same circuit applications.

Q: Are there compliance differences between substitute options?

A: Yes. The original P6SMB39AT3 is RoHS non-compliant. All listed substitutes are RoHS3 compliant. Additionally, P6SMB39A-AU_R2_000A1 and PTVS33VP1UP,115 carry AEC-Q101 automotive qualification, suitable for automotive and high-reliability applications. Other substitutes are RoHS3 compliant without automotive certification.

Q: Which substitute offers the highest peak pulse current capability?

A: SM6T39A from STMicroelectronics provides 57A peak pulse current (8/20µs), significantly higher than other substitutes rated at 11.2A to 11.3A. This makes SM6T39A suitable for applications requiring enhanced transient suppression performance.

Q: What packaging considerations apply when selecting a substitute?

A: Five substitutes use SMB (DO-214AA) package, directly compatible with P6SMB39AT3 PCB layouts. PTVS33VP1UP,115 uses SOD-128 package, requiring different PCB footprint and assembly process. Verify PCB design and assembly equipment compatibility before selecting SOD-128 variant.

Q: Is the P6SMB39A-AU_R2_000A1 suitable for automotive applications?

A: Yes. P6SMB39A-AU_R2_000A1 carries AEC-Q101 qualification and ROHS3 compliance, meeting automotive industry standards. PTVS33VP1UP,115 also carries AEC-Q101 qualification. Both are suitable for automotive transient voltage suppression applications.