1500W bidirectional TVS for general-purpose rail clamping
The 1.5SMC150CA-M3/9AT: It clamps transients at 207V maximum while standing off 128V continuously, making it a fit for 120VAC or 128V DC rail protection where the line sees symmetrical surges.
Clamping voltage and pulse current define the protection window
The 128V reverse standoff means the diode stays off the rail during normal operation and only conducts when a transient exceeds that threshold. The single bidirectional channel handles both positive and negative surges in one package — useful for AC signal lines or DC rails where polarity reversal is possible. Operating temperature spans -65°C to 150°C junction, so it survives thermal cycling in outdoor or industrial enclosures without derating at the cold end.
DO-214AB SMC package and surface-mount assembly
Housed in a DO-214AB (SMC) package, the 1.5SMC150CA-M3/9AT mounts flat on the PCB with the cathode tab as the primary heat path. The SMC footprint is standard across the 1.5SMC series, so a single board layout serves the full voltage range from 5V to 188V standoff.
Active lifecycle and sourcing posture
The 1.5SMC series is a long-running TransZorb® platform with broad distributor coverage, so second-sourcing across the same voltage bin is straightforward. Quoted to order against BOM quantities; availability confirmed at RFQ.