The Schneider Electric EZB630W04 is a 630 A EasyPact busbar with 4 ways, designed for panel distribution in switchgear assemblies built to IEC 60439. It carries a 690 V AC rated insulation voltage and a 550 V AC operational voltage, with a short-time withstand rating of 40 kA for 1 second — enough to coordinate with downstream breakers in a fault scenario.
The 630 A rated current governs the busbar's continuous ampacity in a panel — sized for a main feeder or large subfeed. The 40 kA short-time withstand for 1 s means the busbar can survive a fault current of that magnitude long enough for an upstream breaker to clear, without the bus itself failing. The 4-way configuration accepts up to 12 single-pole devices, 4 three-pole devices, or 6 two-pole devices, giving the panel builder flexibility in how branch circuits are laid out.
Panel integration
It supports busbar extension for 2 or 4 ways, allowing daisy-chaining across multiple sections of the same panel.