SQUARE D, Three Phase, 480V AC Delta, Surge Protection Device - 30EG19|TVS5HWA50X - Grainger
Leviton 277/480-Volt and 220/380-Volt 3-Phase Wye 240-Volt 480-Volt Delt Amp Surge Panel Protector, Gray 42277-DY3 - The Home Depot
10020/4ENCM - Type 1+2+3, 50KA (Level 3/4), 3 phase device with indication, complete in IP65 polycarbonate enclosure, including a 3 pole 63AMP MCB - Surge Devices
Type 1+2 Three phase surge protection device for 250A MCP panels with 3 pole incomer. – Proteus Switchgear