What the 1.5SMCJ75C is and what the voltage ratings mean
The 75 V reverse standoff is the working voltage — below this the device stays off and draws only leakage current during normal operation.
For a general-purpose Zener TVS in a standard SMC footprint, this means it is a stable line item for BOM locking: a reorder in six months or three years carries low lifecycle risk compared to a specialty or automotive-grade variant that may be rationalized.
