SMBJ45D-M3/H Equivalent & Substitute Parts

Part Overview

The SMBJ45D-M3/H is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 45V reverse standoff category and is designed for general-purpose transient voltage suppression applications. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters within the 45V reverse standoff voltage class, compatible surface mount packaging (DO-214AA/SMB), and functional equivalence for transient suppression circuits.

Substiute Parts

SMBJ45D-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1188SMBJ45D-M3/H Datasheet

Current PartRFQ

SMBJ45A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 9159SMBJ45A-E3/52 Datasheet

MFR RecommendedRFQ

1SMB45A TR13

Central Semiconductor CorpIn Stock: 99611SMB45A TR13 Datasheet

MFR RecommendedRFQ

SACB45

Littelfuse Inc.In Stock: 2908SACB45 Datasheet

MFR RecommendedRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

MFR RecommendedRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

MFR RecommendedRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

MFR RecommendedRFQ

SMBJ45A-13-F

Diodes IncorporatedIn Stock: 8608SMBJ45A-13-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ45D-M3/H is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must equal 45V
• Voltage - Breakdown (Min): Must fall within 50V to 50.8V range
• Voltage - Clamping (Max) @ Ipp: Must not exceed 72.7V (within acceptable transient suppression margin)
• Current - Peak Pulse (10/1000µs): Must be 8.3A or greater
• Power - Peak Pulse: Must be 500W or greater
• Mounting Type: Surface Mount required
• Package / Case: DO-214AA or SMB compatible
• Type: Zener diode
• Unidirectional Channels: Single channel (1)

All substitute parts listed maintain these electrical and mechanical parameters within acceptable tolerances for direct circuit substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

SMBJ45A-E3/52 (Vishay General Semiconductor) and SMBJ45A-13-F (Diodes Incorporated) are direct functional equivalents. Both maintain identical electrical parameters to the SMBJ45D-M3/H, operate across the same temperature range (-55°C to 150°C), and carry ROHS3 compliance certification. These parts are recommended for applications requiring strict parameter matching and regulatory compliance.

SMBJ45A (MDD) provides electrical equivalence with slightly reduced lower operating temperature limit (-50°C vs. -55°C). This part is suitable for applications where the minimum operating temperature requirement does not extend below -50°C.

Secondary Substitutes (Parameter Variance)

SACB45 (Littelfuse Inc.) operates within acceptable electrical parameters but exhibits higher clamping voltage (77V vs. 71.6V) and reduced peak pulse current (6.8A vs. 8.4A). This part is suitable for applications with less stringent transient suppression requirements or where higher clamping voltage is acceptable. ROHS3 compliance is maintained.

1SMB45A TR13 (Central Semiconductor Corp) matches electrical performance but carries RoHS non-compliance status. This part is restricted to applications where RoHS compliance is not a regulatory requirement.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45A-E3/52 directly replace SMBJ45D-M3/H in existing designs?

A: Yes. Both parts maintain 45V reverse standoff voltage, equivalent peak pulse current (8.3A vs. 8.4A), and identical 600W peak pulse power rating. Operating temperature ranges are identical (-55°C to 150°C). Both carry ROHS3 compliance. Direct substitution is supported without circuit modification.

Q: What is the difference between SMBJ45A and SMBJ45A-13-F?

A: Both parts are electrically equivalent with 45V standoff, 72.7V clamping voltage, and 8.3A peak pulse current. The primary difference is manufacturer (MDD vs. Diodes Incorporated) and packaging designation. SMBJ45A-13-F includes tape & reel packaging specification. Selection depends on supplier availability and packaging requirements.

Q: Why does SACB45 have higher clamping voltage (77V)?

A: SACB45 is manufactured by Littelfuse Inc. using the SACB series design. While maintaining the same 45V reverse standoff specification, the clamping voltage tolerance is higher. This part remains functionally equivalent for general-purpose transient suppression but may not be suitable for applications requiring clamping voltage below 77V.

Q: Is 1SMB45A TR13 suitable for new designs?

A: 1SMB45A TR13 is electrically equivalent but carries RoHS non-compliance status. This part is restricted to applications where RoHS compliance is not mandated by regulatory requirements or customer specifications. For new designs subject to RoHS requirements, ROHS3-compliant alternatives are recommended.

Q: What is the minimum operating temperature difference between SMBJ45A (MDD) and SMBJ45D-M3/H?

A: SMBJ45A operates from -50°C minimum versus -55°C for SMBJ45D-M3/H. This 5°C difference is acceptable for applications where the circuit environment does not require operation below -50°C. Verify application temperature requirements before selection.

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

A: Yes. All listed substitute parts are surface mount components in DO-214AA or SMB package configurations, ensuring mechanical and footprint compatibility with existing PCB designs.