Mitsubishi Electric MB30-CB-4A Circuit Breaker

The Mitsubishi Electric MB30-CB-4A is a 3-pole circuit breaker rated for 4 A at 220 VAC, built to protect three-phase electrical circuits by interrupting all three conductors when overcurrent is detected. As part of Mitsubishi Electric’s MB30-CB family, the MB30-CB-4A is suited for installation in electrical panels and switchgear where compact, reliable overcurrent protection is required for 220 VAC three-phase systems. This model’s 3-pole configuration and 4 A rating define its use for smaller three-phase loads or branch protection within commercial or light industrial environments, aligning with standard panelboard practices that rely on precise, deliberate isolation in the event of faults. The device is identified by the MB30-CB-4A part number and the Mitsubishi Electric branding, ensuring it is the intended 3-pole, 4-amp, 220 VAC protection solution for circuits in compatible Mitsubishi panel configurations.