1SMB160AT3 Equivalent & Substitute Parts

Part Overview

The 1SMB160AT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface mount applications. This component features a 160V reverse standoff voltage with a 259V maximum clamping voltage and 2.3A peak pulse current capability in a DO-214AA (SMB) package. The part is currently classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

1SMB160AT3

onsemiIn Stock: 7261SMB160AT3 Datasheet

Current PartRFQ

1SMB160A TR13 PBFREE

Central Semiconductor CorpIn Stock: 8161SMB160A TR13 PBFREE Datasheet

DirectRFQ

SMBJ160A

MeritekIn Stock: 9072SMBJ160A Datasheet

DirectRFQ

SMBJ160A

MeritekIn Stock: 9072SMBJ160A Datasheet

DirectRFQ

SMBJ150CA

MDDIn Stock: 25650SMBJ150CA Datasheet

SimilarRFQ

SMBJ150CA

MDDIn Stock: 25650SMBJ150CA Datasheet

SimilarRFQ

SMBJ150CA-TP

Micro Commercial CoIn Stock: 3935SMBJ150CA-TP Datasheet

SimilarRFQ

SMBJ154A-TR

STMicroelectronicsIn Stock: 17360SMBJ154A-TR Datasheet

SimilarRFQ

SMBJ160A-13-F

Diodes IncorporatedIn Stock: 4042SMBJ160A-13-F Datasheet

SimilarRFQ

SMBJ160AE3/TR13

Microchip TechnologyIn Stock: 640SMBJ160AE3/TR13 Datasheet

SimilarRFQ

SMBJ160E3/TR13

Microchip TechnologyIn Stock: 733SMBJ160E3/TR13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1SMB160AT3 is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 160V
• Voltage - Breakdown (Min): 178V
• Voltage - Clamping (Max) @ Ipp: 259V
• Current - Peak Pulse (10/1000µs): 2.3A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Unidirectional Channels: 1

Direct Equivalents maintain all electrical specifications and differ only in manufacturer, product status, or packaging format. These parts are pin-compatible and electrically interchangeable without circuit modification.

Similar Parts share the same package and general application category but deviate in one or more electrical parameters (voltage rating, clamping voltage, or peak current). These require circuit-level evaluation before substitution.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for 1:1 Replacement)

The following parts maintain identical electrical specifications and are recommended as primary replacements:

• 1SMB160A TR13 PBFREE (Central Semiconductor Corp): Active status with ROHS3 compliance. Tape & Reel packaging. Identical electrical performance to the original part.
• SMBJ160A (Meritek): Active status with ROHS3 compliance. Peak current specification of 2.32A is within acceptable tolerance of the 2.3A original specification.
• SMBJ160A-13-F (Diodes Incorporated): Active status with ROHS3 compliance. Tape & Reel packaging. Exact electrical match.
• SMBJ160AE3/TR13 (Microchip Technology): Active status with ROHS3 compliance. Extended operating temperature range (-65°C to 150°C) matches the original specification.

Conditional Alternatives (Lower Voltage Rating)

• SMBJ150CA and SMBJ150CA-TP (MDD / Micro Commercial Co): 150V reverse standoff with 243V clamping voltage. Suitable only for applications where the protected circuit operates at or below 150V standoff conditions. Peak current of 2.5A provides margin.
• SMBJ154A-TR (STMicroelectronics): 154V reverse standoff with 246V clamping voltage. Intermediate option between 150V and 160V ratings. Suitable for circuits designed for 154V protection threshold.

Not Recommended

• SMBJ160E3/TR13 (Microchip Technology): While maintaining 160V standoff voltage, the 287V clamping voltage exceeds the original 259V specification, resulting in higher transient voltage stress on protected components.

All recommended parts carry ROHS3 compliance and are in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can I use SMBJ150CA as a direct replacement for 1SMB160AT3?

A: No. The SMBJ150CA has a 150V reverse standoff voltage compared to the original 160V specification. This part is suitable only for circuits designed to operate at 150V protection levels. Use only if your application circuit operates below 150V standoff conditions.

Q: What is the difference between 1SMB160A TR13 PBFREE and SMBJ160A?

A: Both are electrically equivalent to the original 1SMB160AT3 with 160V standoff and 259V clamping voltage. The primary difference is manufacturer: Central Semiconductor Corp versus Meritek. The SMBJ160A has a peak current specification of 2.32A, which is within acceptable tolerance of the 2.3A original. Both are ROHS3 compliant and in active production.

Q: Why is the 1SMB160AT3 marked as obsolete?

A: The original part is no longer manufactured by onsemi. Active equivalents from other manufacturers provide identical electrical performance and are recommended for new designs and ongoing procurement.

Q: Does packaging format affect substitution?

A: All recommended parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility. Tape & Reel (TR) packaging is a distribution format and does not affect electrical performance or board-level compatibility.

Q: Can I use SMBJ160E3/TR13 instead of 1SMB160AT3?

A: Not recommended. While both maintain 160V standoff voltage, the SMBJ160E3/TR13 has a 287V clamping voltage versus the original 259V specification. This higher clamping voltage will allow greater transient overvoltage to reach protected components, potentially causing damage. Use only if your circuit design specifically requires higher clamping voltage tolerance.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant. The original 1SMB160AT3 is marked as RoHS non-compliant. If RoHS compliance is required for your application, select from the active equivalents.