The EZB630W12 is a 630 A EasyPact busbar from Schneider Electric, designed for 12-way distribution in panelboards and switchgear assemblies built to IEC 60439. It carries a 40 kA short-time withstand rating for 1 second — that's the fault-clearing capacity the busbar can survive without damage, which governs the upstream breaker coordination and the SCCR of the whole assembly.
This part is officially obsolete per Schneider's lifecycle status. There is no listed direct successor order code. The 630 A rating and 12-way configuration are the critical fit parameters; any substitute must match those to maintain the assembly's short-circuit rating and physical layout.
The 630 A rated current is the continuous thermal rating — it governs the maximum load the busbar can carry without exceeding temperature rise limits in a 40 °C ambient. The 690 V insulation voltage sets the dielectric withstand of the busbar insulation system, while the 550 V operational voltage is the maximum line-to-line voltage at which the busbar is rated to carry that 630 A continuously. The 40 kA Icw for 1 second is the short-time withstand current: the busbar must survive this fault current for one second without mechanical or thermal failure, which is the basis for the short-circuit rating of the entire panel.
Physical configuration and panel fit
At 590 mm high, 416 mm wide, and 107 mm deep, this busbar occupies a substantial footprint in the enclosure. It accommodates 12 three-pole devices, or 18 two-pole, or 36 single-pole breakers — the 12-way count refers to the number of three-pole positions. A busbar extension is available for 2 or 4 additional ways if the layout needs expansion. Mounting and busbar support brackets must be sized for the 630 A continuous current and the 40 kA fault current; verify the enclosure's short-circuit withstand before committing the assembly.