Eaton MDL3300C - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton MDL3300C is a 300 A, 600 V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection within panelboards and loadcenters. It pairs a compact molded-case footprint with precise protection, making it a practical choice for organized, reliable electrical distribution.

• Compact molded-case design optimizes panel space, helping you fit protection where it’s needed without crowding the enclosure.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across varying load conditions and fault scenarios, reducing nuisance trips while safeguarding conductors and equipment.
• 3-pole configuration ensures simultaneous disconnection of all phases, essential for balanced 3-phase systems and safer shutdown during faults.
• OEM panelboard compatibility designed to work with matching Eaton loadcenters and panelboards, supporting clean coordination and reliable system integration.
• 600 V rating and 300 A capacity make it suitable for a range of branch circuit protections in residential, commercial, and light industrial settings.

This MDL3300C solution is ideal for electricians and facility managers aiming to modernize or expand protection in existing panel networks. It protects distribution circuits from overloads and short circuits, helping to prevent equipment damage, electrical fires, and unexpected outages in spaces where panel real estate is at a premium.

Key use cases include installing as main or branch protection in new panel installations, upgrading aging panels that require robust thermally coordinated protection, and replacing worn or obsolete 3-pole breakers in compatible OEM systems—while maintaining seamless compatibility with the original panel design and wiring configurations.

Practical considerations when choosing the MDL3300C include ensuring the panelboard is a matched OEM type for optimal fit and protection coordination, and planning for a clean, single-point disconnection across all lines to maximize safety. With its reliable thermal-magnetic trip and space-saving form factor, the MDL3300C delivers focused protection where it matters most—keeping electrical systems safer and more maintainable over time.