What the 1500W rating means for your rail protection
The 1.5SMC47CAHM6G: That 1500W figure is the peak power the device can absorb during a transient — it translates to a peak pulse current of 24A at the 64.8V clamping voltage. The AEC-Q101 qualification (Grade) means this part has passed the automotive stress tests: high-temperature reverse bias, temperature cycling, and ESD robustness per the JEDEC-derived automotive discrete standard.
Package and board-fit for the DO-214AB footprint
The SMC body is larger than the SMA/SMB siblings — the extra copper area under the cathode tab (or the bidirectional equivalent pad) helps spread the transient heat into the PCB copper. The tape-and-reel packaging (TR) is feeder-ready for automated pick-and-place; no MSL concerns beyond the standard Level 1 floor life for this package type.
Listed as Active in production by Taiwan Semiconductor Corporation.