Original Part
Alternative Part
1. TV15C580J-HF Substitution Conclusion
From the perspective of core electrical parameters, package, and functionality, the TV15C580J-HF is a fully viable direct substitute for the original SMCJ58A-HF. Both devices are from Comchip Technology and share identical key specifications: reverse standoff voltage (58V), minimum breakdown voltage (64.4V), maximum clamping voltage (93.6V), peak pulse power (1500W), and package (DO-214AB). The only minor deviation is in the peak pulse current rating; the TV15C580J-HF is rated at 16.03A, slightly higher than the original's 16A. This results in a marginally stronger theoretical surge withstand capability, which constitutes a positive design margin in practical applications. This difference does not introduce any performance degradation or compatibility issues. Therefore, the TV15C580J-HF can be considered a different version or naming variant of an equivalent specification part.
2. SMCJ58A-HRA Substitution Conclusion
The SMCJ58A-HRA also presents a highly feasible direct substitution for the original SMCJ58A-HF. As an industry-standard SMCJ series device manufactured by Littelfuse Inc., all its key protection parameters—58V standoff voltage, 64.4V breakdown voltage, 93.6V clamping voltage, and 1500W peak pulse power—precisely match those of the original. The package is also identical: DO-214AB (SMC). While its specified peak pulse current is 16.1A, showing a 0.1A difference from the original's 16A, this variance falls well within acceptable engineering tolerance. The slightly higher value indicates equivalent or marginally superior surge handling capability in actual clamping protection scenarios. This discrepancy does not affect the device's protective function or reliability within the circuit. Consequently, the SMCJ58A-HRA serves as a qualified second-source or alternative option.
Analysis ID: 0AF3-671F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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