Original Part
Alternative Part
93.6V Clamp 16.1A Ipp Tvs Diode Surface Mount DO-214AB (SMC)
1. SMCJ58A Substitution Conclusion
The SMCJ58A is not a direct substitute for the original SMDJ58A. While both parts are from the same manufacturer (Littelfuse), share identical reverse standoff voltage (58V) and maximum clamping voltage (93.6V), and are package-compatible (DO-214AB/SMC), the core difference lies in their peak pulse power and current ratings. The SMDJ58A is rated for 3000W/32.1A, whereas the SMCJ58A is only rated for 1500W/16.1A. Consequently, the SMCJ58A's capability to absorb transient surge energy is half that of the original part. When subjected to overvoltage transients of the same magnitude, the SMCJ58A may fail due to overload, unable to provide an equivalent level of protection for downstream circuitry. This presents a reliability risk.
2. SMCJ58A-TP Substitution Conclusion
The SMCJ58A-TP is likewise not a direct substitute for the original SMDJ58A. This variant shares identical key electrical parameters (1500W/16.1A) and package with the aforementioned SMCJ58A, with the primary distinction being a manufacturer change to MCC. It inherits the core deficiency of the SMCJ58A—its halved peak pulse power and current capability—and therefore cannot meet the original design's required surge protection rating. Although it can serve as a second-source alternative to the SMCJ58A, its insufficient protective capability relative to the original SMDJ58A remains unchanged. Thus, it is not a valid substitute.
Analysis ID: 8D97-18A7000
Based on part parameters and for reference only. Not to be used for procurement or production.
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