Eaton FD3040 - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Eaton FD3040—a 40A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built to handle the rigors of professional electrical installations, this device safeguards residential, commercial, and light industrial systems with precision and durability.

Why the bolt-on design matters

The secure bolt-on mounting creates a rigid, vibration-resistant connection to the bus, minimizing the risk of loose contacts in environments where equipment or machinery causes movement. This translates to fewer nuisance trips and longer-term reliability in real-world installations.

Thermal-magnetic protection you can trust

Equipped with a thermal-magnetic trip unit, the FD3040 delivers stable, repeatable protection across a wide range of operating conditions. It combines thermally coordinated overload protection with instantaneous magnetic tripping for short circuits, ensuring fast fault isolation and reduced damage to downstream equipment.

What makes this breaker unique

• Three-pole, 40A, 600V rating for balanced protection of three-phase distribution and control circuits
• Bolt-on mounting ensures a secure, solid connection in compatible panelboards and load centers
• Thermal-magnetic trip unit provides reliable coordination and rapid interruption when faults occur
• OEM compatibility designed to fit with matching Eaton and OEM load centers and panelboards
• Molded case construction offers robust insulation and durability in demanding environments

Ideal use cases

• Upgrading or replacing failing breakers in panelboards and load centers that require 3-pole, 40A protection
• Protection for three-phase circuits in commercial spaces, light industrial equipment, and distributed control panels
• New installations where a reliable bolt-on MCCB is preferred for secure bus connections and long service life

Technical snapshot

• Manufacturer: Eaton
• Part Number: FD3040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and use

Ensure compatibility with your panelboard’s listing and follow manufacturer torque specifications during installation. Use appropriate mounting hardware to maintain the integrity of the bus connection, and verify that the device’s trip characteristics align with the protection coordination plan for your electrical system.