SMCJ54C Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMCJ54C is a 1500W bidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface mount component operates in the 54V reverse standoff voltage class and provides transient protection for general-purpose applications. The part is classified as Active product status with full RoHS3 compliance. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and operational parameters within the SMCJ series classification.

Substiute Parts

SMCJ54C

Taiwan Semiconductor CorporationIn Stock: 1087SMCJ54C Datasheet

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SMCJ54CA

MeritekIn Stock: 20479SMCJ54CA Datasheet

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SMCJ54CA

MeritekIn Stock: 20479SMCJ54CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ54C are identified through strict alignment of the following critical parameters:

Voltage Class Matching: Reverse standoff voltage of 54V and breakdown voltage minimum of 60V establish the primary substitution criterion. All substitute parts must operate within this voltage classification.

Power Dissipation: Peak pulse power rating of 1500W is a mandatory matching parameter. Substitute parts must sustain equivalent transient energy absorption capacity.

Current Handling: Peak pulse current (10/1000µs) of 16A or higher establishes the minimum current capability threshold for functional equivalence.

Package Compatibility: DO-214AB (SMC) surface mount package is required for mechanical and thermal compatibility in existing PCB layouts.

Temperature Operating Range: -55°C to 150°C junction temperature range defines the thermal envelope for substitute selection.

Electrical Type: Bidirectional zener diode topology with single channel configuration is mandatory.

Compliance Standards: RoHS3 compliance and REACH unaffected status are required for regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - SMCJ54C (Taiwan Semiconductor Corporation): This is the original specified component with Active product status. It provides 96.3V maximum clamping voltage and 16A peak pulse current. Full RoHS3 compliance and REACH unaffected status confirm regulatory alignment. Inventory availability of 1015 pieces supports production requirements.

Substitute Selection - SMCJ54CA (Meritek): This component maintains identical voltage class parameters (54V standoff, 60V breakdown minimum) and equivalent 1500W power dissipation. The SMCJ54CA delivers 17.22A peak pulse current, exceeding the original 16A specification. Clamping voltage is 87.1V, which is lower than the original 96.3V but remains within the functional operating envelope for the 54V class. Both components share DO-214AB (SMC) package compatibility, identical temperature range (-55°C to 150°C), and equivalent compliance certifications (RoHS3, REACH unaffected). Inventory availability of 20400 pieces provides extended supply assurance. Active product status confirms ongoing manufacturer support.

Substitution Validity: The SMCJ54CA is electrically and mechanically equivalent to the SMCJ54C for applications requiring 54V class transient voltage suppression with 1500W peak pulse power handling in surface mount DO-214AB packaging.

Frequently Asked Questions (FAQ)

Q: What determines if SMCJ54CA can substitute for SMCJ54C?

A: Substitution is valid when the following parameters match or exceed the original specification: reverse standoff voltage (54V), breakdown voltage minimum (60V), peak pulse power (1500W), operating temperature range (-55°C to 150°C), package type (DO-214AB SMC), and compliance certifications (RoHS3, REACH unaffected). The SMCJ54CA meets all these criteria.

Q: How does the lower clamping voltage (87.1V vs 96.3V) affect substitution?

A: Both values fall within the acceptable clamping range for 54V class TVS diodes. The lower clamping voltage of the SMCJ54CA provides tighter transient suppression, which is functionally equivalent or superior for circuit protection purposes.

Q: Is the higher peak pulse current (17.22A vs 16A) a concern?

A: No. Higher peak pulse current capability indicates greater transient handling capacity. The SMCJ54CA can absorb equal or greater transient energy compared to the original SMCJ54C specification.

Q: Are the packages physically identical?

A: Yes. Both components use DO-214AB (SMC) surface mount packaging, ensuring direct PCB footprint compatibility without layout modifications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both SMCJ54C and SMCJ54CA are RoHS3 compliant and REACH unaffected, confirming equivalent regulatory status for industrial and commercial applications.

Q: What is the difference between SMCJ54C and SMCJ54CA part numbers?

A: The base part number SMCJ54 defines the 54V voltage class. The suffix "C" on SMCJ54C and "CA" on SMCJ54CA indicates manufacturer-specific variants. Both are functionally equivalent within the SMCJ series classification.

Q: Can I use SMCJ54CA in existing designs without circuit modifications?

A: Yes. Identical electrical parameters, package type, and temperature range permit direct substitution without design changes. The component operates within the same functional envelope as the original SMCJ54C.