Eaton FDB2040 - 40 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Eaton FDB2040 is a rugged 40A, 600V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built to endure vibration and demanding electrical environments, it helps keep critical circuits safe and operational.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection. This design minimizes movement and loosening over time, helping maintain consistent electrical contact in busy electrical rooms, mechanical spaces, and commercial work sites.
• Thermal-magnetic trip unit delivers stable, repeatable protection. The thermal element handles normal overloads with gradual response, while the magnetic element provides instantaneous disconnection during short-circuit events, helping to safeguard wires, devices, and downstream equipment.
• OEM-ready compatibility works with matching Eaton OEM load centers and panelboards, making replacement straightforward and reducing the need for adapters or reconfiguration.
• 2-pole design ensures simultaneous disconnection of both conductors, enhancing safety for 240V circuits and equipment that require a common-trip protection scheme.
• Versatile application suitable for residential, commercial, and light industrial environments, from home garages and offices to small manufacturing spaces where dependable overcurrent and short-circuit protection matters.

What this means in practical terms: when you’re updating an aging panel or stocking a replacement for a failed breaker, the FDB2040 provides a straightforward, code-compliant solution that won’t require retrofits. It protects a wide range of branch circuits—whether powering lighting, receptacles, small motors, or control circuits—while staying compatible with Eaton’s family of panel products.

Technical specifications at a glance

• Manufacturer: Eaton
• Part number: FDB2040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 600V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Conductor and installation notes: for standard copper conductors, plan for commonly used sizes around 8 AWG for 40A circuits (and 6 AWG for aluminum equivalents). Ensure the panelboard’s bus bars and mounting surfaces are clean and free of debris before installation, and torque specs follow the panel manufacturer’s guidelines to maintain a solid, code-compliant connection.

Whether you’re upgrading an aging panel, stocking a spare for service work, or equipping a new install, the Eaton FDB2040 delivers dependable, code-aligned protection with easy integration into Eaton panel ecosystems. Choose this 2-pole bolt-on breaker for robust performance, long-term reliability, and straightforward compatibility with OEM load centers and panelboards.