General Electric | MB233WB | Circuit Breaker | 225A | 3-Pole | 480V | 65kA

The General Electric MB233WB circuit breaker is a rugged, three-pole protective device engineered for demanding industrial and commercial power systems. With a 225A rating, 480V operational voltage, and a 65kA fault-interrupting capacity, this breaker delivers dependable protection for feeders and motors in challenging environments. Designed for maintenance, retrofit, or replacement projects, it’s the precise match when your system demands exact specifications and trusted GE reliability.

Important note: Confirm fit and ratings before ordering. The part number MB233WB is your strongest reference for compatibility, helping you avoid mismatches in panelboard and bussing configurations.

Key specifications

• Amperage: 225A
• Poles: 3-Pole
• Voltage: 480V
• Interrupting Rating: 65kA

What makes the MB233WB distinct

• Exact-match performance for GE panelboards and similar three-phase distributions that require a 225A, 3-pole, 480V protection device with a high fault-interruption capacity.
• Higher fault tolerance (65kA) than many residential or lighter-duty breakers, making it suitable for industrial feeders, motors, and equipment that demand prompt isolation during faults.
• Three-pole design ensures simultaneous disconnection of all phases, reducing arcing risk and protecting equipment from unbalanced faults.
• Part-number fidelity (MB233WB) provides a straightforward path to compatibility, simplifying procurement and installation in retrofit or maintenance scenarios.

Ideal use cases

• Upgrading or refurbishing medium-to-heavy-duty electrical feeders in commercial facilities, manufacturing floors, or data centers where 480V three-phase power is standard.
• Retrofits in older GE installations where exact part matching is essential to maintain protective coordination and trip characteristics.
• New installations that require robust overcurrent protection for motors, pumps, compressors, and other high-load equipment operating at 480V.

Installation, compatibility, and practical tips

To ensure reliable protection, match this device to systems that specify the MB233WB or MB-series family as the compatible protective device. Always verify the panel model, bus bar configuration, and breaking-capacity requirements before ordering. Keep the part number MB233WB on hand as the primary reference when coordinating with inventories, drawings, or supplier catalogs.

Practical considerations for field teams::

• Inspect labeling and terminal torque requirements per GE’s installation guidelines to maintain proper electrical continuity and safe operation.
• Plan for future expansions by choosing a breaker with the same frame size and compatible trip characteristics to simplify maintenance and upgrades.
• Store and handle with care to avoid mechanical damage that could affect locking mechanisms or insulation integrity.