SMBJ85CD-M3/I Equivalent & Substitute Parts

Part Overview

The SMBJ85CD-M3/I is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component operates in the DO-214AA (SMB) package and provides transient voltage protection for general-purpose applications. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the specified parameter tolerances for this product category.

Substiute Parts

SMBJ85CD-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 997SMBJ85CD-M3/I Datasheet

Current PartRFQ

SMBJ85CA-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 4389SMBJ85CA-E3/5B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ85CD-M3/I is determined by the following criteria:

• Reverse Standoff Voltage: 85V (nominal)
• Breakdown Voltage: minimum 94.4V or higher
• Clamping Voltage: maximum 137V or lower
• Peak Pulse Current: 4.4A or higher
• Peak Pulse Power: 600W
• Package: DO-214AA (SMB) surface mount
• Mounting Type: Surface Mount
• Temperature Range: -55°C to 150°C (TJ)
• Compliance: ROHS3 Compliant, MSL 1

The SMBJ85CA-E3/5B meets all substitution criteria within these electrical and mechanical tolerances, maintaining functional equivalence for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ85CD-M3/I and SMBJ85CA-E3/5B are active production components with ROHS3 compliance and identical moisture sensitivity ratings. The SMBJ85CA-E3/5B demonstrates higher inventory availability (4332 pcs vs. 976 pcs), making it a viable alternative for procurement planning. Both parts maintain equivalent operating temperature ranges and identical peak pulse power ratings. Selection between these parts should be based on supply chain requirements and lead time considerations, as electrical performance and mechanical compatibility are functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can SMBJ85CA-E3/5B be used as a direct replacement for SMBJ85CD-M3/I?

A: Yes. Both parts share identical reverse standoff voltage (85V), equivalent peak pulse current ratings (4.46A vs. 4.4A), and identical clamping voltage tolerance windows. The breakdown voltage and clamping voltage parameters fall within acceptable substitution ranges. Both use DO-214AA (SMB) surface mount packaging.

Q: Are there differences in the clamping voltage specifications?

A: The SMBJ85CD-M3/I specifies a maximum clamping voltage of 135V, while the SMBJ85CA-E3/5B specifies 137V. Both values remain within the functional tolerance band for 85V standoff voltage TVS diodes in this series and do not affect circuit compatibility.

Q: Do both parts have the same package and mounting requirements?

A: Yes. Both parts use the DO-214AA (SMB) package with surface mount configuration. PCB footprints and reflow soldering parameters are identical.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) and identical REACH and ECCN classifications.

Q: What is the basis for substitution eligibility?

A: Substitution is based on matching reverse standoff voltage (85V), maintaining peak pulse power (600W), ensuring peak pulse current capability (4.4A minimum), and confirming identical package type (DO-214AA, SMB) and operating temperature range (-55°C to 150°C TJ).