Eaton GMCP003A0C - 3 A, 480 V, 3-Pole Circuit Breaker | AmpState

The Eaton GMCP003A0C is a compact, three-pole molded case circuit breaker engineered for dependable branch circuit protection in panelboards and loadcenters. With a 3 A rating at 480 V, it delivers precise, reliable protection for three-phase distribution without hogging valuable panel space.

• Space-efficient design: The molded case form factor optimizes panel real estate, making it ideal for modern electrical layouts where every inch matters.
• Thermal-magnetic trip unit: Combines thermal and magnetic sensing to deliver stable, repeatable protection across varying loads and fault conditions, reducing nuisance trips and improving coordination with other protection devices.
• OEM load center compatibility: Specifically designed to pair with matching Eaton OEM load centers and panelboards, ensuring smooth installation and reliable performance when replacing or expanding existing systems.
• Versatility across sectors: Suitable for residential, commercial, and light industrial applications that require solid 3-pole protection for 3-phase circuits.

What it protects and why it matters

As a 3 A, 3-pole device rated for 480 V, the GMCP003A0C provides essential branch circuit overcurrent and short-circuit protection. In three-phase systems, this breaker helps prevent overheating, equipment damage, and electrical fires by interrupting fault currents quickly and safely. Its compact form and precise trip characteristics make it a dependable choice for protected, scalable power distribution in panelboards and load centers.

Key specifications

• Manufacturer: Eaton
• Part number: GMCP003A0C
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 3 A
• Voltage rating: 480 V
• Number of poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Perfect for commercial electrical rooms, light industrial panelboards, and multi-dwelling installations where three-phase distribution at 480 V is present. Use it to protect critical loads such as motors, pumps, and control circuits, or to expand existing protection schemes in OEM-compliant panel centers. Its compatibility with Eaton-matched panel infrastructure simplifies installation and future servicing.

Practical tips for optimal performance

• Verify that your panelboard or load center is rated for 480 V and supports 3-pole molded case breakers of this type before installation.
• Coordinate protection with adjacent devices to ensure selective tripping—the thermal-magnetic design aids consistent performance across temperature variations and load profiles.
• Plan replacements or expansions with OEM compatibility in mind to maintain a cohesive protection scheme and streamline future maintenance.

Upgrade or outfit your distribution system with the Eaton GMCP003A0C to secure reliable, three-phase overcurrent and short-circuit protection in a compact, panel-faithful package.