SMBJ51CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ51CA-M3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 51V 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 designs requiring overvoltage protection in compact form factors.

Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA/SMB package family. Substitutes maintain identical or functionally equivalent voltage ratings, clamping characteristics, and peak pulse current specifications.

Substiute Parts

SMBJ51CA-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1100SMBJ51CA-M3/52 Datasheet

Current PartRFQ

SMBJ51CD-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 3428SMBJ51CD-M3/H Datasheet

DirectRFQ

SMBJ51CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 17967SMBJ51CA-E3/52 Datasheet

MFR RecommendedRFQ

1SMB51CA TR13 PBFREE

Central Semiconductor CorpIn Stock: 67661SMB51CA TR13 PBFREE Datasheet

DirectRFQ

SMBJ51CA-13-F

Diodes IncorporatedIn Stock: 12327SMBJ51CA-13-F Datasheet

DirectRFQ

SMBJ51CA-TP

Micro Commercial CoIn Stock: 2969SMBJ51CA-TP Datasheet

DirectRFQ

SMBJ51CA

MDDIn Stock: 15751SMBJ51CA Datasheet

MFR RecommendedRFQ

SMBJ51CA

MDDIn Stock: 15751SMBJ51CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ51CA-M3/52 are qualified based on the following electrical and mechanical criteria:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 51V
• Voltage - Clamping (Max) @ Ipp: 82.4V (±1.2V tolerance acceptable)
• Current - Peak Pulse (10/1000µs): 7.3A (±0.1A tolerance acceptable)
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional, Single Channel
• RoHS Status: ROHS3 Compliant

All identified substitutes maintain these core electrical specifications within acceptable engineering tolerances. Packaging variants (Tape & Reel vs. Cut Tape & Digi-Reel) do not affect electrical performance and represent logistics/procurement options only.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical Performance):

• SMBJ51CA-E3/52 (Vishay): Identical specifications to main part; available in higher quantity (17950 Pcs); Cut Tape & Digi-Reel packaging; RoHS3 compliant
• SMBJ51CA-13-F (Diodes Incorporated): Identical electrical specifications; RoHS3 compliant; 12300 Pcs available
• SMBJ51CA-TP (Micro Commercial Co): Identical electrical specifications; extended operating temperature range (-55°C ~ 175°C); RoHS3 compliant

Secondary Substitute (Minor Electrical Variance):

• SMBJ51CD-M3/H (Vishay): Clamping voltage 81.2V (1.2V lower than main part); peak pulse current 7.4A (0.1A higher); functionally equivalent for most applications; 3353 Pcs available; RoHS3 compliant

Alternative Manufacturer Options:

• 1SMB51CA TR13 PBFREE (Central Semiconductor Corp): Identical electrical specifications; extended lower temperature rating (-65°C); RoHS3 compliant; 6727 Pcs available
• SMBJ51CA (MDD): Identical electrical specifications; RoHS3 compliant; highest inventory (15680 Pcs); slightly narrower lower temperature limit (-50°C)

All substitutes maintain RoHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and Active product status. Selection should be based on packaging requirements, inventory availability, and operating temperature constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ51CD-M3/H be used as a direct replacement for SMBJ51CA-M3/52?

A: SMBJ51CD-M3/H is functionally equivalent with minor electrical variance. The clamping voltage is 81.2V versus 82.4V (1.2V difference), and peak pulse current is 7.4A versus 7.3A. Both maintain the same 51V reverse standoff voltage and 600W peak pulse power. This substitute is acceptable for general-purpose transient protection applications where the specified tolerance band permits this variance.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Packaging format affects procurement and assembly logistics only. Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) are both surface mount delivery methods. Electrical performance and mechanical compatibility (DO-214AA/SMB package) remain identical. Selection depends on manufacturing equipment and supply chain requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitute parts carry RoHS3 Compliant status, matching the main part specification. All are also REACH Unaffected and carry Moisture Sensitivity Level 1 (Unlimited).

Q: Which substitute has the widest operating temperature range?

A: SMBJ51CA-TP (Micro Commercial Co) offers the extended range of -55°C ~ 175°C, compared to the main part's -55°C ~ 150°C. This provides additional thermal margin for high-temperature applications.

Q: Can I use SMBJ51CA (MDD) if my application requires operation below -50°C?

A: No. SMBJ51CA (MDD) specifies a lower operating temperature limit of -50°C, whereas the main part and most substitutes support -55°C. For applications requiring -55°C operation, select SMBJ51CA-M3/52, SMBJ51CD-M3/H, SMBJ51CA-E3/52, SMBJ51CA-13-F, or SMBJ51CA-TP.

Q: Are there inventory considerations for design selection?

A: Yes. SMBJ51CA-E3/52 offers the highest inventory (17950 Pcs), followed by SMBJ51CA (MDD) at 15680 Pcs. If supply continuity is critical, these options provide greater availability. The main part (SMBJ51CA-M3/52) has 1072 Pcs available.