SMBJ43A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ43A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 43V reverse standoff category and is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant, making it suitable for modern electronic designs requiring ESD and surge protection.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple qualified suppliers is needed to ensure supply chain continuity.

Substiute Parts

SMBJ43A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 957SMBJ43A-M3/5B Datasheet

Current PartRFQ

SMBJ43A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 18864SMBJ43A-E3/52 Datasheet

DirectRFQ

SMBJ43D-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 8466SMBJ43D-M3/I Datasheet

DirectRFQ

SMBJ43A

MeritekIn Stock: 15892SMBJ43A Datasheet

DirectRFQ

SMBJ43A

MeritekIn Stock: 15892SMBJ43A Datasheet

DirectRFQ

SMBJ43A-13-F

Diodes IncorporatedIn Stock: 215366SMBJ43A-13-F Datasheet

DirectRFQ

SMBJ43A-TP

Micro Commercial CoIn Stock: 3755SMBJ43A-TP Datasheet

DirectRFQ

SZ1SMB43AT3G

Littelfuse Inc.In Stock: 9096SZ1SMB43AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ43A-M3/5B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 43V
• Voltage - Breakdown (Min): 47.8V or 48.5V (within tolerance band)
• Voltage - Clamping (Max) @ Ipp: 69.4V or 68.5V (within tolerance band)
• Current - Peak Pulse (10/1000µs): 8.6A or 8.76A (within tolerance band)
• Power - Peak Pulse: 600W
• Type: Zener
• Unidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All qualified substitutes maintain identical or equivalent electrical performance within the specified tolerance bands and share the same physical package footprint, ensuring direct PCB compatibility without design modification.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with current manufacturing standards. The SMBJ43A-E3/52 from Vishay provides direct electrical and packaging equivalence with identical parameter specifications. The SMBJ43D-M3/I variant from Vishay offers slightly enhanced peak pulse current (8.76A) and marginally lower clamping voltage (68.5V), remaining within acceptable tolerance bands for 43V TVS applications.

The SMBJ43A-13-F from Diodes Incorporated and SMBJ43A-TP from Micro Commercial Co provide functionally equivalent alternatives with standard operating temperature ranges. The SZ1SMB43AT3G from Littelfuse Inc. is manufacturer-recommended and includes AEC-Q101 automotive qualification with extended lower temperature rating (-65°C), suitable for automotive and harsh environment applications.

The Meritek SMBJ43A variant provides equivalent electrical performance and is available in high inventory quantities, supporting supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can SMBJ43D-M3/I be used as a direct replacement for SMBJ43A-M3/5B?

A: Yes. Both parts share identical reverse standoff voltage (43V), package format (DO-214AA, SMB), and power rating (600W). The SMBJ43D-M3/I exhibits slightly higher peak pulse current (8.76A vs 8.6A) and lower clamping voltage (68.5V vs 69.4V), both within acceptable tolerance bands for 43V TVS applications. No circuit redesign is required.

Q: What is the difference between SMBJ43A-E3/52 and SMBJ43A-M3/5B?

A: These parts are electrically and mechanically identical. The suffix designations (E3/52 vs M3/5B) represent different packaging tape configurations and reel specifications from Vishay. Both are suitable for automated assembly processes and provide equivalent performance.

Q: Is the SZ1SMB43AT3G suitable for non-automotive applications?

A: Yes. The SZ1SMB43AT3G meets all electrical and package requirements for general-purpose TVS applications. The AEC-Q101 automotive qualification indicates enhanced reliability screening and is not restrictive for non-automotive use. The extended lower temperature rating (-65°C) provides additional margin in cold environment applications.

Q: Can I substitute parts from different manufacturers in the same circuit?

A: Yes. All listed substitutes maintain identical reverse standoff voltage (43V), clamping voltage (69.4V or 68.5V), and package format (DO-214AA, SMB). Electrical performance is equivalent across manufacturers. PCB layout and assembly processes remain unchanged.

Q: What does MSL 1 (Unlimited) mean for storage and handling?

A: MSL 1 indicates the component has unlimited shelf life and does not require moisture-controlled storage. Standard handling practices for surface mount components apply. No special desiccant storage or bake-out procedures are necessary before assembly.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status, meeting current environmental and hazardous substance restrictions for electronic components in regulated markets.