600W bidirectional TVS in a through-hole axial package
The STMicroelectronics P6KE30CARL is a bidirectional Zener TVS diode from the P6KE TRANSIL™ series, rated for 600W peak pulse power over the standard 10/1000 µs waveform. It provides a single channel of bidirectional clamping, making it suitable for protecting AC signal lines or DC lines where polarity is not fixed.
Clamping voltages and the protection window
The reverse standoff voltage is 25.6V — the line voltage this part can sit across without conducting. Breakdown occurs at 28.5V minimum, and the clamping voltage at peak pulse current is 53.5V maximum. That 25V window between standoff and clamp determines how much overvoltage the downstream circuitry must survive.
Peak pulse current and capacitance
Rated for 75A peak pulse current under the 8/20 µs waveform. The junction capacitance is 537.5 pF at 1 MHz — high enough to load high-speed data lines, so this part is better suited for power rails and general-purpose protection than for gigabit signal paths.
Obsolete — sourcing through independent distribution
The P6KE30CARL is listed as obsolete by STMicroelectronics. For new designs, consider the active P6KE series variants in the same DO-15 package, or evaluate SMD alternatives like the SMCJ series if board space allows a footprint change.