5 kW peak-pulse TVS Zener in the P600 axial package
The 5KP20A is a unidirectional Zener-based TVS suppressor from Littelfuse's 5KP series, rated 5000W peak pulse dissipation during a 10/1000 µs transient event. The standoff voltage sits at 20V typ, with the clamping ceiling at 32.4V max — this means the part transitions from blocking to conducting sharply at the breakdown threshold, clamping the overvoltage before it propagates downstream. The P600 axial package is a through-hole body; the tape-and-reel and cut-tape options cover both high-volume automated insertion and low-quantity hand-assembly runs. The base product number prefix 5KP2 groups this into the 5KP family — buyers cross-shopping the series will find the same mechanical form across a range of standoff voltages.
General-purpose application designation means the part is not qualified to a specific standard tier — no AEC-Q101, no MIL-PRF — so if the end equipment carries a qualification requirement, confirm the datasheet test conditions cover the stress profile before committing. Peak pulse current of 157.4A (10/1000 µs) sets the surge event size this part is rated to interrupt — a 157A surge clamped to 32.4V delivers roughly 5 kW into the TVS and away from the protected load. For higher surge current environments, a higher-pulse-power series in the same P600 package may be the right move — check the 5KP family for a higher standoff voltage if the system rail runs above 20V.