Voltage thresholds and clamping performance
The 1.5SMC22CA_R1_00001: Breakdown occurs at 20.9 V minimum, ensuring the device stays transparent below the protected rail. The 30.6 V clamp ceiling at full rated current means a 24 V bus sees the surge clipped before exceeding typical downstream component absolute maximums. Single bidirectional channel handles both polarity transients on the same line, eliminating the need for two back-to-back unidirectional parts.
The SMC footprint provides adequate copper area for the 1500 W pulse energy to dissipate without exceeding the thermal limit.