The P4KE series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events.
Datasheets by Manufacturer
P4KE51A — Microsemi — 400 Watt Transient Voltage Suppressor
P4KE51C — Won-Top Electronics — 400W TRANSIENT VOLTAGE SUPPRESSOR
P4KE51C-G — Comchip — 400W Transient Voltage Suppressor
P4KE51-G — Comchip — 400W Transient Voltage Suppressor
P4KE51A — Rectron — GPP TRANSIENT VOLTAGE SUPPRESSOR