Eaton MDL3300W - 300 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton MDL3300W—a 300A, 600V, 3-Pole molded case circuit breaker designed to provide dependable branch circuit protection in panelboards and load centers. Built to guard against overloads and short circuits, this unit combines robust performance with practical flexibility for real-world electrical layouts.

• Compact molded-case design streamlines panel layouts and frees up space, helping you maximize the capacity of existing enclosures without sacrificing reliability.
• Thermal-magnetic trip unit delivers stable, repeatable protection by pairing thermal overload sensing with instantaneous magnetic trip for short-circuit events—maintaining consistent protection across temperature swings and load variations.
• 3-pole operation ideal for 3-phase circuits up to 600V, making it well-suited for three-phase feeders and motor-driven applications in commercial and light industrial settings.
• OEM-compatible engineered to pair with matching Eaton OEM load centers and panelboards for straightforward replacement and cohesive electrical characteristics throughout the system.

Where it fits: This breaker excels in residential subpanels, commercial service panels, and light industrial panels where high-current protection and reliable performance are critical. Use it to protect feeders, main distributions, or essential equipment circuits where a 300A, 600V classification is required.

• Applications: Branch circuit protection for large feeders, HVAC equipment, pumps, and other motor loads in panelboards and load centers.
• Ideal for: Contractors, maintenance technicians, and facility managers seeking a durable, field-tested solution with predictable tripping behavior.
• Compatibility: Ensures consistent protection when paired with Eaton’s corresponding panel products, reducing coordination issues and simplifying inventory.

Technical snapshot:

• Manufacturer: Eaton
• Part number: MDL3300W
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 300A
• Voltage rating: 600V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Designed for reliability in demanding environments, the Eaton MDL3300W is a practical choice for modern electrical systems. Whether you’re upgrading an aging panel, stocking spare parts for maintenance, or configuring a new installation, this 3-pole breaker offers precise protection with a compact form factor and OEM-ready compatibility. Available through AmpState, a trusted source for electrical components and fast, dependable service.