SMLJ11CA Equivalent & Substitute Parts

Part Overview

The SMLJ11CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 11V reverse standoff voltage with an 18.2V maximum clamping voltage and 164.8A peak pulse current capability in a DO-214AB (SMC) package. The part is active in production status and ROHS3 compliant.

Equivalent and substitute parts are identified when components share compatible electrical characteristics within the defined parameter tolerances for this TVS diode category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

SMLJ11CA

Bourns Inc.In Stock: 2865SMLJ11CA Datasheet

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1.5SMC13CA

Taiwan Semiconductor CorporationIn Stock: 8221.5SMC13CA Datasheet

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SMCJ11CA

Good-Ark SemiconductorIn Stock: 17187SMCJ11CA Datasheet

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SMCJ11CA

Good-Ark SemiconductorIn Stock: 17187SMCJ11CA Datasheet

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SMCJ11CA-13-F

Diodes IncorporatedIn Stock: 3677SMCJ11CA-13-F Datasheet

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SMCJ11CA-TP

Micro Commercial CoIn Stock: 3958SMCJ11CA-TP Datasheet

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TPSMC12CA

Littelfuse Inc.In Stock: 4030TPSMC12CA Datasheet

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TPSMC13CA

Littelfuse Inc.In Stock: 2428TPSMC13CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ11CA are grouped based on strict electrical parameter compatibility within the TVS diode category. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 11V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 18.2V
• Package / Case: DO-214AB (SMC)
• Bidirectional Channels: 1
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Parameters:

• Current - Peak Pulse (10/1000µs): 82.4A to 164.8A range
• Power - Peak Pulse: 1500W to 3000W range
• Operating Temperature: -55°C minimum to 150°C or higher maximum
• Type: Zener (bidirectional)

Parts meeting these criteria are classified as direct substitutes. Variations in peak pulse current and power dissipation within the specified ranges indicate different thermal performance classes but maintain functional equivalence for general-purpose protection applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

SMCJ11CA, SMCJ11CA-13-F, SMCJ11CA-TP, 1.5SMC13CA, and TPSMC13CA are direct substitutes for the SMLJ11CA. These parts maintain identical or near-identical reverse standoff voltage (11V to 11.1V), breakdown voltage (12.2V to 12.4V), and clamping voltage (18.2V) specifications. All are ROHS3 compliant and packaged in DO-214AB (SMC) format. Peak pulse current ratings range from 82.4A to 86A, with power dissipation at 1500W, representing lower thermal performance than the primary part but suitable for general-purpose protection circuits.

SMCJ11CA-TP offers extended operating temperature range to 175°C, providing thermal margin advantage in high-temperature environments compared to the standard -55°C to 150°C specification.

Conditional Substitute (Parameter Deviation):

TPSMC12CA exhibits a lower reverse standoff voltage (10.2V) and clamping voltage (16.7V) compared to the SMLJ11CA specification. This part is suitable only in applications where the lower voltage thresholds are acceptable. TPSMC12CA carries AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications where the SMLJ11CA may not be specified.

All substitute parts maintain ROHS3 compliance and active production status, ensuring long-term availability and regulatory consistency with the original component.

Frequently Asked Questions (FAQ)

Q: Can SMCJ11CA directly replace SMLJ11CA in existing designs?

A: Yes. SMCJ11CA maintains identical reverse standoff voltage (11V), breakdown voltage (12.2V), and clamping voltage (18.2V) specifications. The primary difference is reduced peak pulse current (82.4A versus 164.8A) and power dissipation (1500W versus 3000W). Direct substitution is valid for applications where the lower thermal performance is acceptable.

Q: What is the difference between 1.5SMC13CA and SMLJ11CA?

A: Both parts share 18.2V clamping voltage and 11V-class reverse standoff voltage. The 1.5SMC13CA designation indicates 1500W peak pulse power rating versus 3000W for SMLJ11CA. Reverse standoff voltage is 11.1V (versus 11V), and peak pulse current is 86A (versus 164.8A). Substitution is valid where lower transient energy absorption is acceptable.

Q: Why does TPSMC12CA have different voltage specifications?

A: TPSMC12CA is rated for 10.2V reverse standoff and 16.7V clamping voltage, representing a lower voltage class within the TVS diode family. This part is not a direct substitute for SMLJ11CA but serves applications requiring lower protection thresholds. TPSMC12CA carries AEC-Q101 automotive qualification, making it suitable for automotive applications where SMLJ11CA may not be specified.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the regulatory requirement of the SMLJ11CA.

Q: What is the significance of the DO-214AB (SMC) package specification?

A: DO-214AB (SMC) is the standard surface-mount package for this TVS diode category. All listed parts use this identical package, ensuring mechanical and electrical compatibility in PCB layouts. No package adaptation is required for substitution.

Q: Can SMCJ11CA-TP be used in applications exceeding 150°C?

A: SMCJ11CA-TP is rated for -55°C to 175°C operating temperature, extending the upper thermal limit by 25°C compared to standard parts rated to 150°C. This part is suitable for high-temperature applications where the extended range provides operational margin.