Clamping a 150V rail
The SMAJ150A-13-F: Its 150V reverse standoff voltage and 167V minimum breakdown voltage mean it sits across a 150V DC bus and stays transparent until a transient pushes the rail above 167V, then it clamps at 243V max while shunting 1.6A peak pulse current.
What the ratings mean for the BOM
The 400W peak pulse power rating is the device's energy-handling capacity for a standard 10/1000µs surge — enough for secondary protection on a 150V telecom or industrial DC rail where the upstream PTC or fuse clears the fault. The 243V clamping voltage is the maximum the protected load sees during the event; if the downstream circuitry has a 250V abs-max rating, this TVS provides margin. The DO-214AC (SMA) package is a standard surface-mount footprint — the same pad pattern used across the SMAJ family, so a BOM swap between voltage variants needs no layout change.
Lifecycle and procurement
Listed as Active — Diodes Incorporated continues to manufacture this part with no announced end-of-life. The SMAJ150A-13-F ships in Tape & Reel (TR) or Cut Tape (CT), standard for automated pick-and-place assembly.