It is an insulation accessory that fits between phases to maintain clearance and creepage distances inside the panel.
Mounts directly onto the EZC100 breaker poles to provide phase-to-phase insulation. The set-of-2 quantity covers one 3-pole breaker. No special tooling required — clips into place during panel assembly.
Performance Level is rated F H B N, indicating the barrier meets multiple short-circuit withstand grades across the EZC100 range. This is a passive insulation component — no electrical ratings beyond the breaker's own SCCR apply.