600W Zener TVS for 14V rails
The SMBJ14A-13-F: Its 14V reverse standoff voltage means it stays transparent below the rail voltage, drawing negligible leakage. When a surge exceeds the 15.6V minimum breakdown threshold, the device clamps at 23.2V maximum, shunting up to 25.8A of peak pulse current in the 10/1000µs waveform. That 600W rating is the peak power it can absorb in a single pulse — the limiting factor for how large a transient it can handle before the junction overheats.
Package and board-fit
Housed in the DO-214AA (SMB) package, this TVS uses the standard JEDEC footprint for 600W-class devices. The SMB body is larger than the SMA sibling — the extra copper pad area under the cathode tab improves thermal impedance to the board, which directly affects how quickly the junction cools between pulses. Surface-mount assembly with a 260°C peak reflow profile per J-STD-020; the package is compatible with standard pick-and-place. The single unidirectional channel protects one rail; for bidirectional or AC-coupled lines, two devices back-to-back or a bidirectional variant is needed.
The 150°C TJ max means the device can sit near a hot regulator or in a sealed enclosure without derating the pulse power — though the 600W rating is specified at 25°C and derates linearly above that per the datasheet curve. General-purpose application classification means it is not qualified to AEC-Q101, so for automotive-grade BOMs the AEC-Q101 qualified sibling in the same SMBJ family should be specified instead.