Voltage clamp and pulse current
The SMCJ10CA-13: The reverse standoff voltage is 10 V, with a minimum breakdown of 11.1 V. The single bidirectional channel means one part clamps both polarities, saving board space compared to two unidirectional diodes in anti-series.
Package and temperature range
Note that the part is not rated for power line protection — the spec explicitly flags Power Line Protection as No, so it is intended for signal and low-voltage DC rail clamping, not mains or high-energy AC suppression.