Why 1500 W peak pulse decides the protection budget
The 1.5SMC62CA-E3/9AT: A lower-rated TVS in the same SMC package would clip sooner and heat up; the 1.5SMC series is the mid-range power band in the Vishay lineup, positioned above the 400 W 1.5KE family and below the 3 kW 5SMC series, so the board layout and thermal pad must be sized for 1500 W dissipation on a surface-mount land pattern.
Where a bidirectional TVS this grade protects
Bidirectional polarity means it clamps both polarities of surge — useful on rails that float, drive inductive loads, or see ringing relative to ground. The DO-214AB SMC package reflow-solders to a standard land pattern — no special tooling required. The base product number 1.5SMC62 carries the 62 V nominal working voltage in the series; the CA suffix designates the bidirectional bidirectional polarity. This series is catalogued for general-purpose protection — not a safety-certified or IEC 62368 compliant type, so for equipment requiring a listed surge protective device the system-level cert is the governing document, not this component rating alone.
This part carries an Active product status from Vishay General Semiconductor — Diodes Division.