85V rail clamp with 600W pulse rating
The SMBJ85CA-13-F: Its 85V reverse standoff voltage means the device draws negligible leakage current at the normal operating voltage, only conducting when a surge pushes the line above the 94.4V minimum breakdown threshold. Peak pulse power is rated at 600W for a 10/1000µs waveform, which translates to a 4.4A peak pulse current capability. The clamping voltage maxes out at 137V at that current — the margin between the 85V rail and the clamp point determines whether downstream silicon survives a lightning surge or inductive kickback. At elevated ambient, derate the peak pulse power per the datasheet's thermal impedance curve — the DO-214AA SMB package dissipates heat through the PCB copper pad, not through the body.
Surface-mount DO-214AA (SMB) package with the cathode band marking the bidirectional orientation — polarity does not matter for this part, but the footprint is standard for the SMBJ family. The reel quantity is typically 3000 pieces per 13-inch reel for this package size — confirm the exact reel count with your order quantity to avoid line-side shortages during pick-and-place.
Active lifecycle and sourcing posture
The base product number is SMBJ85, which covers the entire 85V standoff variant across unidirectional and bidirectional options. The -13-F suffix denotes the tape-and-reel packaging and lead-free finish — confirm the plating and packing code matches your assembly house's requirements.