SMB8J8.0CA-M3/5B Equivalent & Substitute Parts

Part Overview

The SMB8J8.0CA-M3/5B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates as a surface-mount device in the DO-214AA (SMB) package and is designed for general-purpose transient voltage protection applications. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit protection applications.

Substiute Parts

SMB8J8.0CA-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 976SMB8J8.0CA-M3/5B Datasheet

Current PartRFQ

SMBJ8.0CA

MDDIn Stock: 3454SMBJ8.0CA Datasheet

MFR RecommendedRFQ

SMBJ8V0CA

Taiwan Semiconductor CorporationIn Stock: 4360SMBJ8V0CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMB8J8.0CA-M3/5B are qualified based on the following electrical and mechanical parameters:

• Voltage Rating Match: Reverse standoff voltage of 8V, breakdown voltage minimum of 8.89V, and clamping voltage maximum of 13.6V must be identical
• Package Compatibility: All substitutes must use DO-214AA or SMB package designation for surface-mount compatibility
• Bidirectional Configuration: Single-channel bidirectional TVS diode topology
• Current Handling: Peak pulse current rating must support the application requirements
• Temperature Range: Operating temperature specifications must cover the intended application environment
• Compliance Standards: RoHS3 compliance and MSL 1 rating required for manufacturing compatibility

The identified substitute parts meet these criteria while maintaining functional equivalence in transient voltage suppression circuits.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and meet RoHS3 compliance requirements with MSL 1 ratings, ensuring compatibility with standard manufacturing and assembly processes. The SMB8J8.0CA-M3/5B (Vishay) provides the highest peak pulse current rating at 58.8A and 800W peak pulse power, making it suitable for applications requiring maximum transient energy absorption. The SMBJ8.0CA (MDD) and SMBJ8V0CA (Taiwan Semiconductor) both deliver 44.2A and 44.1A peak pulse current respectively with 600W peak pulse power ratings. Selection between these substitutes depends on application current requirements and thermal dissipation constraints. The SMBJ8V0CA maintains the full -55 to 150°C operating temperature range matching the original part, while the SMBJ8.0CA operates from -50°C, which may be limiting in extreme cold environments. All parts share identical voltage ratings and package specifications, ensuring direct mechanical and electrical compatibility in DO-214AA surface-mount applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.0CA or SMBJ8V0CA be used as direct replacements for SMB8J8.0CA-M3/5B?

A: Both parts are functionally equivalent for applications where peak pulse current requirements do not exceed 44.2A. The voltage ratings, package type, and bidirectional configuration are identical. Applications requiring the full 58.8A peak pulse current capability of the original part require the SMB8J8.0CA-M3/5B.

Q: What is the significance of the different peak pulse current ratings?

A: Peak pulse current rating determines the maximum transient current the TVS diode can safely suppress. The SMB8J8.0CA-M3/5B handles 58.8A, while the MDD and Taiwan Semiconductor alternatives handle 44.2A and 44.1A respectively. Selection must match or exceed the maximum transient current expected in the protected circuit.

Q: Are there temperature range differences between these parts?

A: The SMB8J8.0CA-M3/5B and SMBJ8V0CA both operate from -55 to 150°C. The SMBJ8.0CA operates from -50 to 150°C, which is a 5°C limitation at the lower temperature extreme. For applications requiring full -55°C operation, the SMBJ8V0CA is the preferred substitute.

Q: Do all parts use the same DO-214AA package?

A: Yes. All three parts use the DO-214AA (SMB) surface-mount package, ensuring identical PCB footprint compatibility and assembly process compatibility.

Q: Are RoHS and MSL ratings consistent across all parts?

A: All three parts are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings, ensuring compatibility with standard lead-free manufacturing and storage requirements.