SMBJ13CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ13CE3/TR13 is an active-status Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology. This surface-mount component operates in the DO-214AA/SMB package and provides bidirectional overvoltage protection for general-purpose applications. Substitute parts are identified when design requirements demand alternative sourcing due to supply constraints, inventory availability, or equivalent electrical and mechanical compatibility within specified parameter limits.

Substiute Parts

SMBJ13CE3/TR13

Microchip TechnologyIn Stock: 999SMBJ13CE3/TR13 Datasheet

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SMBJ13CA

MDDIn Stock: 20484SMBJ13CA Datasheet

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SMBJ13CA

MDDIn Stock: 20484SMBJ13CA Datasheet

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SMBJ13CA

MDDIn Stock: 20484SMBJ13CA Datasheet

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SMBJ13CA-13-F

Diodes IncorporatedIn Stock: 5427SMBJ13CA-13-F Datasheet

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SZ1SMB13CAT3G

Littelfuse Inc.In Stock: 3275SZ1SMB13CAT3G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes in the 13V nominal class is determined by the following parameters:

• Voltage - Reverse Standoff (Typ): All substitute parts maintain 13V standoff voltage, ensuring comparable circuit protection threshold behavior.
• Voltage - Breakdown (Min): All substitutes hold minimum breakdown at 14.4V, matching the main part.
• Package / Case: All substitute parts are housed in DO-214AA or SMB package, maintaining identical PCB footprint compatibility.
• Mounting Type: All parts are surface-mount, compatible with standard assembly equipment.
• Compliance: All parts maintain ROHS3 compliance and unlimited MSL rating.

The following substitute parts qualify:

• SMBJ13CA (MDD) — 21.5V clamp, 28A Ipp, -50°C ~ 150°C
• SMBJ13CA-13-F (Diodes Incorporated) — 21.5V clamp, 27.9A Ipp, -55°C ~ 150°C
• SZ1SMB13CAT3G (Littelfuse Inc.) — 21.5V clamp, 27.9A Ipp, -65°C ~ 150°C, AEC-Q101 automotive qualified

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status with full ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring compliance with standard electronic component requirements.

SMBJ13CA (MDD): Offers highest peak pulse current at 28A with stable clamping characteristics. Operating temperature range extends to -50°C minimum; applications requiring operation below -50°C should reference alternative sources.

SMBJ13CA-13-F (Diodes Incorporated): Provides balanced performance with 27.9A peak pulse current and -55°C minimum operating temperature, extending environmental coverage compared to the MDD variant.

SZ1SMB13CAT3G (Littelfuse Inc.): Matches the original part's -65°C minimum temperature specification. Includes AEC-Q101 automotive qualification and measured capacitance (630pF @ 1MHz), supporting automotive and controlled-environment applications.

The main part SMBJ13CE3/TR13 exhibits superior clamping voltage performance (23.8V maximum versus 21.5V for substitutes), providing additional overvoltage margin in sensitive circuits. Selection between the main part and substitutes depends on specific circuit margin requirements and environmental operating conditions.

Frequently Asked Questions (FAQ)

Q: Can SMBJ13CA replace SMBJ13CE3/TR13 without circuit modification?

A: Direct pinout compatibility exists due to identical DO-214AA/SMB package geometry and matching voltage ratings (13V standoff, 14.4V minimum breakdown). The SMBJ13CA achieves lower clamping voltage (21.5V versus 23.8V), resulting in tighter overvoltage protection. Circuit margin analysis is required to confirm acceptability within specific application constraints.

Q: What is the primary difference between substitute parts?

A: The operating temperature range varies across substitutes: MDD variant operates from -50°C, Diodes Incorporated from -55°C, and Littelfuse from -65°C. The Littelfuse SZ1SMB13CAT3G includes automotive-grade AEC-Q101 qualification. Peak pulse current specifications cluster between 27.9A and 28A across all substitutes, compared to 25.2A for the original part.

Q: Does package variation affect PCB assembly?

A: All parts employ surface-mount DO-214AA/SMB packaging with identical footprint geometry, compatible with standard SMD assembly equipment and reflow processes. No design modifications are required.

Q: Is RoHS compliance consistent across all alternatives?

A: All listed parts maintain ROHS3 compliance with unlimited MSL rating, satisfying environmental and handling requirements equivalent to the original specification.

Q: Should automotive applications use a specific substitute?

A: The SZ1SMB13CAT3G (Littelfuse) carries AEC-Q101 automotive qualification and extended temperature range (-65°C ~ 150°C), meeting automotive-grade component standards. Applications requiring formal automotive qualification should specify this variant.