600W bidirectional TVS for 90V rails
The SMBJ90CA-13: The reverse standoff voltage of 90 V means it sits across the line without conducting during normal operation; only when the surge exceeds the 100 V minimum breakdown threshold does it begin to clamp, holding the peak at 146 V maximum at the rated 4.1 A pulse current (10/1000 µs waveform). The bidirectional configuration (one channel) protects signal or power pairs where the transient can swing either polarity — common on AC-coupled data lines, 90 VDC bus rails, or telecom interfaces that see both positive and negative surges. The 600 W rating at the 10/1000 µs pulse defines the energy it absorbs in a single event; for shorter pulses the peak power capability is higher, but the 146 V clamp is the hard ceiling the downstream circuitry must survive.
For a 90 V rail in a motor-drive or power-supply output stage, the 4.1 A peak pulse current at the clamp voltage gives a rough surge-energy budget of about 600 mJ per event — enough for most IEC 61000-4-5 level 2 or 3 transients when the source impedance is 2 Ω or higher.
Active production and sourcing posture
The base product number SMBJ90 identifies the voltage family; the CA suffix marks the bidirectional polarity, and the -13 tape-and-reel suffix indicates the standard 13-inch reel packaging for automated pick-and-place.