Eaton FD3125 - 125 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

When dependable branch circuit protection is non-negotiable, the Eaton FD3125 delivers. This 125 A, 600 V, 3-pole bolt-on molded case circuit breaker is engineered for panelboards and load centers, providing a robust balance of protection and reliability for residential, commercial, and light industrial environments. Sold through AmpState, it’s designed to integrate seamlessly with Eaton’s OEM-load centers for a cohesive electrical system.

Secure bolt-on mounting for a vibration-resistant connection

The FD3125 uses a secure bolt-on mounting method that creates a rigid bus connection. This design minimizes movement and loose contacts in vibration-prone installations, helping to maintain consistent electrical performance over time and reducing the risk of poor connections that can lead to overheating or nuisance trips.

Thermal-magnetic trip for stable, repeatable protection

Equipped with a thermal-magnetic trip unit, this breaker protects against both overloads and short circuits with steady, repeatable response. The thermal element handles gradual overcurrent conditions, while the magnetic element delivers an instantaneous interruption when a short circuit occurs, helping to safeguard equipment and maintain service continuity.

OEM-compatible and ready for panel integration

Designed to pair with matching Eaton OEM load centers and panelboards, the FD3125 ensures straightforward installation, consistent trip characteristics, and reliable performance within established Eaton ecosystems. This compatibility minimizes configuration guesswork and helps you maintain system-wide protection coordination.

Ideal applications and use cases

- Suitable for service panels, distribution panels, and subpanels in residential, commercial, and light industrial settings.

- Ideal for installations where a secure, vibration-resistant connection is critical, such as equipment rooms, mechanical spaces, and outdoor enclosures subject to movement or temperature shifts.

Specifications at a glance

• Amperage rating: 125 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection
• Manufacturer: Eaton
• Part number: FD3125

Choosing the FD3125 means prioritizing connection integrity, predictable protection, and a clear path to compatibility within Eaton’s panelboard ecosystem. For professionals stocking parts or upgrading panels, this 3-pole, 125 A breaker provides a reliable, long‑lasting solution that keeps systems protected and running smoothly.