1SMB7.0AT3 Equivalent & Substitute Parts

Part Overview

The 1SMB7.0AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7V reverse standoff voltage with 12V clamping capability and is housed in an SMB (DO-214AA) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

1SMB7.0AT3

onsemiIn Stock: 8601SMB7.0AT3 Datasheet

Current PartRFQ

SMBJ7.0A

MDDIn Stock: 15703SMBJ7.0A Datasheet

DirectRFQ

SMBJ7.0A

MDDIn Stock: 15703SMBJ7.0A Datasheet

DirectRFQ

SMBJ7.0A-13

Diodes IncorporatedIn Stock: 903SMBJ7.0A-13 Datasheet

DirectRFQ

PTVS7V0P1UP,115

Nexperia USA Inc.In Stock: 3750PTVS7V0P1UP,115 Datasheet

SimilarRFQ

SMBG7.0AHE3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 853SMBG7.0AHE3/52 Datasheet

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SMBJ6.5A-TR

STMicroelectronicsIn Stock: 10447SMBJ6.5A-TR Datasheet

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SMBJ7.0A-TP

Micro Commercial CoIn Stock: 15406SMBJ7.0A-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB7.0AT3 is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 7V
• Voltage - Clamping (Max) @ Ipp: 12V
• Current - Peak Pulse (10/1000µs): 50A
• Power - Peak Pulse: 600W

Mechanical Parameters (Must Match):

• Package / Case: DO-214AA, SMB (or compatible surface-mount variants)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Compliance Parameters (Preferred but not mandatory for direct substitution):

• RoHS Status: ROHS3 Compliant (preferred over non-compliant)
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts listed below maintain these core electrical and mechanical specifications, enabling direct functional replacement in circuit designs originally specified for the 1SMB7.0AT3.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

SMBJ7.0A (MDD) and SMBJ7.0A-TP (Micro Commercial Co) are the preferred direct replacements. Both maintain identical electrical specifications (7V standoff, 12V clamping, 50A peak pulse) and standard SMB packaging. Both are currently in active production status with ROHS3 compliance, addressing the obsolescence of the original onsemi part. SMBJ7.0A-TP offers extended operating temperature range to 175°C, providing additional thermal margin in demanding applications.

Secondary Substitutes (Package Variant Consideration):

SMBG7.0AHE3/52 (Vishay) and PTVS7V0P1UP,115 (Nexperia) maintain identical electrical parameters but employ alternative package formats (DO-215AA gull wing and SOD-128 respectively). These are suitable for applications where package footprint compatibility is not a constraint. Both carry ROHS3 compliance and active product status. PTVS7V0P1UP,115 includes AEC-Q101 automotive qualification.

Marginal Substitute (Voltage Deviation):

SMBJ6.5A-TR (STMicroelectronics) exhibits a 0.5V reduction in reverse standoff voltage (6.5V vs. 7V) and clamping voltage (11.2V vs. 12V), with a corresponding increase in peak pulse current (56A vs. 50A). This part is suitable only for applications where the lower voltage rating is acceptable and does not compromise circuit protection requirements.

Avoid:

SMBJ7.0A-13 (Diodes Incorporated) is discontinued at DiGi Electronics and carries RoHS non-compliance status, offering no advantage over active alternatives.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.0A directly replace 1SMB7.0AT3 without circuit modification?

A: Yes. SMBJ7.0A maintains identical electrical specifications (7V standoff, 12V clamping, 50A peak pulse) and standard SMB packaging. No circuit redesign is required for direct substitution.

Q: What is the difference between SMB and DO-214AA package designations?

A: SMB and DO-214AA refer to the same physical package format. The terms are interchangeable in industry documentation. Both describe a surface-mount diode package with identical footprint and lead configuration.

Q: Why is SMBJ6.5A-TR listed as a substitute if the voltage rating is lower?

A: SMBJ6.5A-TR is included as a marginal substitute for applications where the 0.5V voltage reduction is acceptable. It is not recommended as a primary replacement for designs requiring strict 7V standoff voltage compliance.

Q: Does the package variant (DO-215AA vs. DO-214AA) affect circuit compatibility?

A: Package variants have different physical footprints and PCB land patterns. DO-215AA (gull wing) and DO-214AA (SMB) are not mechanically interchangeable without PCB redesign. Select substitutes based on your existing PCB layout requirements.

Q: Are all listed substitutes RoHS compliant?

A: Most active substitutes (SMBJ7.0A-TP, SMBJ7.0A, PTVS7V0P1UP,115, SMBG7.0AHE3/52, SMBJ6.5A-TR) carry ROHS3 compliance. SMBJ7.0A-13 is RoHS non-compliant. Verify compliance requirements for your specific application before selection.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and requires no special storage or handling precautions. All listed substitutes share this rating with the original 1SMB7.0AT3.