SMBJ54A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ54A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface-mount component operates in the 54V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and RoHS3 compliant, making it suitable for modern electronic circuit protection requirements. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA (SMB) package family.

Substiute Parts

SMBJ54A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 818SMBJ54A-E3/5B Datasheet

Current PartRFQ

SMBJ54D-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 7491SMBJ54D-M3/I Datasheet

DirectRFQ

SMBJ54A-13-F

Diodes IncorporatedIn Stock: 15364SMBJ54A-13-F Datasheet

DirectRFQ

SMBJ54A-TP

Micro Commercial CoIn Stock: 3940SMBJ54A-TP Datasheet

DirectRFQ

SMBJ51CA-TP

Micro Commercial CoIn Stock: 2969SMBJ51CA-TP Datasheet

MFR RecommendedRFQ

SMBJ54A

MDDIn Stock: 3461SMBJ54A Datasheet

MFR RecommendedRFQ

SMBJ54A

MDDIn Stock: 3461SMBJ54A Datasheet

MFR RecommendedRFQ

SMBJ54A

MDDIn Stock: 3461SMBJ54A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ54A-E3/5B are classified based on the following substitution criteria:

Primary Substitution Criteria (Electrical Equivalence):

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Current - Peak Pulse (10/1000µs): 6.9A
• Power - Peak Pulse: 600W
• Type: Unidirectional Zener
• Package: DO-214AA (SMB)

Secondary Substitution Criteria (Mechanical & Compliance):

• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Direct Equivalents maintain identical electrical specifications across all critical parameters. These parts are sourced from different manufacturers but deliver the same performance envelope.

Functional Alternatives operate within acceptable parameter tolerances for the 54V protection class. The SMBJ54D-M3/I exhibits slightly different clamping voltage (85.9V vs 87.1V) and peak pulse current (7A vs 6.9A), remaining within the functional range for 54V standoff applications. The SMBJ51CA-TP operates at a lower voltage class (51V standoff) and is classified as a manufacturer-recommended alternative for applications where lower voltage protection is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Preferred): SMBJ54A-13-F (Diodes Incorporated) and SMBJ54A-TP (Micro Commercial Co) are direct electrical equivalents to the SMBJ54A-E3/5B. Both maintain identical voltage and current specifications with full RoHS3 compliance and MSL 1 rating. SMBJ54A-TP offers extended operating temperature range (-55°C ~ 175°C) compared to the main part (-55°C ~ 150°C), providing additional thermal margin for high-temperature applications. SMBJ54A (MDD) is also electrically equivalent but operates at a reduced lower temperature limit (-50°C minimum).

Functional Alternative (Same Voltage Class): SMBJ54D-M3/I (Vishay) operates within the 54V protection class with minor parameter variations: clamping voltage of 85.9V (versus 87.1V) and peak pulse current of 7A (versus 6.9A). This part remains functionally suitable for 54V standoff applications and maintains identical temperature range and compliance certifications.

Lower Voltage Class Alternative (Conditional): SMBJ51CA-TP (Micro Commercial Co) is a manufacturer-recommended alternative operating at 51V reverse standoff. This part is suitable only for applications where lower voltage protection is acceptable. It features bidirectional operation (versus unidirectional), higher peak pulse current (7.3A), and extended operating temperature range (-55°C ~ 175°C). Selection of this part requires circuit-level voltage compatibility verification.

All substitute parts maintain Active product status, RoHS3 compliance, and MSL 1 rating, ensuring compatibility with modern manufacturing and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ54A-TP be used as a direct replacement for SMBJ54A-E3/5B? A: Yes. SMBJ54A-TP is a direct electrical equivalent with identical voltage (54V standoff, 87.1V clamping) and current (6.9A peak pulse) specifications. Both are unidirectional Zener TVS diodes in DO-214AA (SMB) packages. SMBJ54A-TP offers extended operating temperature range (-55°C ~ 175°C versus -55°C ~ 150°C), making it suitable for higher-temperature environments.

Q: What is the difference between SMBJ54D-M3/I and SMBJ54A-E3/5B? A: Both operate at 54V reverse standoff voltage. SMBJ54D-M3/I exhibits slightly lower clamping voltage (85.9V versus 87.1V) and higher peak pulse current (7A versus 6.9A). These variations remain within the functional range for 54V protection class applications. Both maintain identical operating temperature range (-55°C ~ 150°C) and compliance certifications.

Q: Is SMBJ51CA-TP compatible with circuits designed for SMBJ54A-E3/5B? A: SMBJ51CA-TP operates at a lower voltage class (51V standoff versus 54V). Compatibility depends on circuit requirements. If the circuit requires 54V protection, SMBJ51CA-TP will trigger at lower voltage levels and is not suitable. Additionally, SMBJ51CA-TP is bidirectional (versus unidirectional), which may affect circuit behavior in directional protection applications. Circuit-level verification is required before substitution.

Q: Do all substitute parts use the same DO-214AA (SMB) package? A: Yes. All listed substitute parts use DO-214AA (SMB) surface-mount package, ensuring mechanical and footprint compatibility. No PCB layout modifications are required for direct substitution among these parts.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, meeting modern manufacturing and environmental standards.

Q: Which substitute part offers the widest operating temperature range? A: SMBJ54A-TP and SMBJ51CA-TP both operate across -55°C ~ 175°C, providing 25°C additional upper temperature margin compared to the main part (-55°C ~ 150°C). SMBJ54A-TP is preferred for high-temperature applications requiring 54V protection.

Q: What does "unidirectional" versus "bidirectional" mean for TVS diodes? A: Unidirectional TVS diodes (SMBJ54A-E3/5B, SMBJ54D-M3/I, SMBJ54A-13-F, SMBJ54A-TP, SMBJ54A) protect against transients in one direction only. Bidirectional TVS diodes (SMBJ51CA-TP) protect against transients in both directions. Circuit topology determines which type is appropriate.