1SMB5.0AT3 Equivalent & Substitute Parts

Part Overview

The 1SMB5.0AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose voltage clamping applications. This component features a 5V reverse standoff voltage with a 9.2V maximum clamping voltage and is housed in an SMB (DO-214AA) surface mount package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

1SMB5.0AT3

onsemiIn Stock: 31671SMB5.0AT3 Datasheet

Current PartRFQ

SMBJ5.0A

EVVO SemiIn Stock: 44345SMBJ5.0A Datasheet

DirectRFQ

SMBJ5.0A

EVVO SemiIn Stock: 44345SMBJ5.0A Datasheet

DirectRFQ

SMBJ5.0A-TR

STMicroelectronicsIn Stock: 97417SMBJ5.0A-TR Datasheet

DirectRFQ

PTVS5V0P1UP,115

Nexperia USA Inc.In Stock: 36224PTVS5V0P1UP,115 Datasheet

SimilarRFQ

SMBJ5.0A-13-F

Diodes IncorporatedIn Stock: 2190SMBJ5.0A-13-F Datasheet

SimilarRFQ

SMBJ5.0A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 80486SMBJ5.0A-E3/52 Datasheet

SimilarRFQ

SMBJ5.0A-TP

Micro Commercial CoIn Stock: 2815SMBJ5.0A-TP Datasheet

SimilarRFQ

SMBJ5V0A

Fairchild SemiconductorIn Stock: 21873SMBJ5V0A Datasheet

SimilarRFQ

TV06B5V0JB-G

Comchip TechnologyIn Stock: 828TV06B5V0JB-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 1SMB5.0AT3 is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 5V
• Voltage - Clamping (Max) @ Ipp: 9.2V
• Voltage - Breakdown (Min): 6.4V
• Current - Peak Pulse (10/1000µs): 65.2A to 68A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these core electrical specifications and package compatibility. Substitute parts are grouped into two categories: direct equivalents with identical part numbers across manufacturers, and similar parts with equivalent electrical performance but different package variants or manufacturer designations.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 1SMB5.0AT3, the following selection criteria apply:

Primary Recommendation - SMB Package (DO-214AA): Parts SMBJ5.0A-TR (STMicroelectronics), SMBJ5.0A-13-F (Diodes Incorporated), SMBJ5.0A-E3/52 (Vishay), and SMBJ5.0A-TP (Micro Commercial Co) provide identical electrical performance and package compatibility. All are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability.

Alternative Package - SOD-128: The PTVS5V0P1UP,115 (Nexperia) offers equivalent electrical specifications with AEC-Q101 automotive qualification and ROHS3 compliance. This part requires PCB layout modification due to its SOD-128 package format.

Compliance Consideration: The original 1SMB5.0AT3 is RoHS non-compliant. All recommended substitutes are ROHS3 compliant, aligning with current regulatory requirements and industry standards.

Availability: All substitute parts listed maintain active product status with substantial inventory levels, ensuring reliable procurement for production and design support.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 1SMB5.0AT3 with SMBJ5.0A variants without PCB modification?

A: Yes. SMBJ5.0A variants from STMicroelectronics, Diodes Incorporated, Vishay, and Micro Commercial Co maintain identical DO-214AA (SMB) package geometry and electrical specifications. No PCB layout changes are required.

Q: What is the difference between SMBJ5.0A from different manufacturers?

A: All SMBJ5.0A variants meet the same electrical specifications: 5V reverse standoff, 9.2V clamping voltage, and 600W peak pulse power. Differences exist only in manufacturer designation, packaging format (cut tape vs. tape & reel), and minor variations in peak pulse current (65.2A to 68A), which remain within functional equivalence.

Q: Is PTVS5V0P1UP,115 a suitable replacement?

A: PTVS5V0P1UP,115 provides equivalent electrical performance and includes AEC-Q101 automotive qualification. However, it uses SOD-128 package format instead of SMB, requiring PCB redesign. Select this part only if your application requires automotive-grade qualification or if PCB modification is feasible.

Q: Why is the original 1SMB5.0AT3 marked as obsolete?

A: The 1SMB5.0AT3 is obsolete and no longer manufactured by onsemi. All substitute parts listed are active products with confirmed long-term availability, making them suitable for new designs and production support.

Q: Are all substitute parts RoHS compliant?

A: All recommended substitute parts are ROHS3 compliant, except SMBJ5V0A (Fairchild), for which RoHS status is not specified. For applications requiring RoHS compliance, select from the ROHS3-compliant options.

Q: What is the operating temperature range for substitute parts?

A: Most substitute parts operate from -55°C to 150°C (TJ). SMBJ5.0A-TP extends to -55°C to 175°C (TJ), providing wider thermal operating range if required by application specifications.