SMBJ48A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ48A-M3/52 is an active Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional Zener diode operates in the 48V reverse standoff category and is designed for general-purpose transient voltage suppression applications. The part is housed in a DO-214AA (SMB) surface mount package and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications. Alternative sources and packaging configurations are available to support supply chain flexibility and design requirements.

Substiute Parts

SMBJ48A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 944SMBJ48A-M3/52 Datasheet

Current PartRFQ

SMBJ48A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 3880SMBJ48A-E3/5B Datasheet

DirectRFQ

SMBJ48A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 20164SMBJ48A-E3/52 Datasheet

MFR RecommendedRFQ

SMBJ48A

MeritekIn Stock: 77463SMBJ48A Datasheet

DirectRFQ

SMBJ48A

MeritekIn Stock: 77463SMBJ48A Datasheet

DirectRFQ

SMBJ48A-13-F

Diodes IncorporatedIn Stock: 6470SMBJ48A-13-F Datasheet

MFR RecommendedRFQ

SMBJ48A-TP

Micro Commercial CoIn Stock: 3872SMBJ48A-TP Datasheet

MFR RecommendedRFQ

SZ1SMB48AT3G

Littelfuse Inc.In Stock: 2236SZ1SMB48AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ48A-M3/52 is determined by the following critical parameters:

• Voltage - Reverse Standoff: 48V (nominal)
• Voltage - Breakdown (Min): 53.3V
• Voltage - Clamping (Max) @ Ipp: 77.4V
• Current - Peak Pulse (10/1000µs): 7.7A to 7.8A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Operating Temperature: -55°C minimum to 150°C minimum
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Manufacturer Equivalents (Vishay) Parts SMBJ48A-E3/5B and SMBJ48A-E3/52 are manufactured by Vishay and share identical electrical specifications with the main part. These differ only in packaging configuration (Tape & Reel vs. Cut Tape & Digi-Reel).

Category 2: Cross-Manufacturer Substitutes Parts from Meritek, Diodes Incorporated, Micro Commercial Co, and Littelfuse Inc. meet all critical electrical parameters within specified tolerances. Peak pulse current ranges from 7.7A to 7.75A, which falls within acceptable substitution limits for this device class. All parts maintain the same package footprint (DO-214AA/SMB) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, meeting the core requirements for direct substitution in applications currently using the SMBJ48A-M3/52.

Vishay Direct Equivalents (SMBJ48A-E3/5B, SMBJ48A-E3/52): These parts are manufactured by the original equipment manufacturer and provide identical electrical performance. Selection between these and the main part depends on packaging and supply availability. SMBJ48A-E3/52 is available in higher inventory (20,100 units) compared to SMBJ48A-E3/5B (3,846 units).

Cross-Manufacturer Substitutes: All cross-manufacturer options meet the specified electrical parameters within acceptable tolerances. The Micro Commercial Co variant (SMBJ48A-TP) extends the upper operating temperature to 175°C, providing additional thermal margin for high-temperature applications. The Littelfuse Inc. variant (SZ1SMB48AT3G) extends the lower operating temperature to -65°C and includes AEC-Q101 automotive qualification, suitable for automotive and harsh environment applications.

Selection should prioritize availability, lead time requirements, and specific application temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48A-E3/5B be used as a direct replacement for SMBJ48A-M3/52?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications: 48V reverse standoff, 77.4V clamping voltage, 7.8A peak pulse current, and 600W peak pulse power. The difference is packaging configuration (Tape & Reel vs. Cut Tape & Digi-Reel). Footprint and electrical performance are equivalent.

Q: What is the difference between the Meritek SMBJ48A and the Vishay SMBJ48A-M3/52?

A: Both parts meet the same electrical specifications for voltage and power ratings. The Meritek variant specifies 7.75A peak pulse current compared to 7.8A for Vishay. This 0.05A difference is within acceptable substitution tolerance for this device class. Both are ROHS3 compliant and rated for -55°C to 150°C operation.

Q: Is the Littelfuse SZ1SMB48AT3G suitable for automotive applications?

A: Yes. The Littelfuse part carries AEC-Q101 automotive qualification and extends the lower operating temperature to -65°C. It maintains all critical electrical parameters (48V standoff, 77.4V clamping, 7.7A peak pulse, 600W peak power) and is ROHS3 compliant. This part is appropriate for automotive and harsh environment designs.

Q: Does the Micro Commercial Co SMBJ48A-TP offer any advantages over the main part?

A: The SMBJ48A-TP extends the upper operating temperature to 175°C compared to 150°C for the SMBJ48A-M3/52. This provides additional thermal margin for high-temperature applications. Electrical specifications remain equivalent (48V standoff, 77.4V clamping, 7.7A peak pulse, 600W peak power).

Q: Are all substitute parts available in the same DO-214AA (SMB) package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with designs using the SMBJ48A-M3/52.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. The Littelfuse variant additionally carries AEC-Q101 automotive qualification. All parts are REACH unaffected and classified as EAR99 for export purposes.