What 5 kW peak pulse means for let-through voltage
The 5KP20CA: The 157.4 A surge current rating is what gives this part enough headroom to protect most low-voltage rail systems without collapsing into conduction before the clamp engages.
Breakdown and clamping — the voltage chain
The reverse standoff voltage is 20 V typical — the working rail the TVS sees in normal operation. Minimum breakdown sits at 22.2 V, so the device does not turn on prematurely at the rail voltage. When a transient exceeds that threshold, the clamp limits the peak to 32.4 V, giving a clamping ratio of roughly 1.6× over the standoff — tight enough to protect sensitive circuits without excessive let-through.
Bidirectional single-channel operation means it clamps both polarities from one part — no need to stack two unidirectional devices.
P600 axial through-hole package
The P600 axial package mounts through-hole on a PCB, which simplifies board assembly and gives a robust leaded form factor for environments where vibration or thermal cycling stresses surface-mount solder joints. The Tape & Reel and Cut Tape packaging options support both high-volume assembly and low-quantity prototyping runs.