Eaton FD1040L (347 V) - 40 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Eaton FD1040L (347 V) is a rugged, single-pole molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and loadcenters. With a 40A rating at 347V, it’s built to handle common commercial and light industrial distribution needs while keeping wiring clean, secure, and compliant.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that helps maintain consistent electrical contact and reduces the risk of loose connections in environments with movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance against both overcurrent and short-circuit events, helping safeguard wiring and connected equipment from fault conditions.
• OEM-compatible design is crafted to work with matching loadcenters and panelboards, simplifying installation, inventory management, and service compatibility across system upgrades.
• Versatile application suitable for residential-like electrical distribution in commercial spaces, light industrial configurations, and other 347V circuits that demand reliable protection.

Technical snapshot

• Manufacturer / Model: Eaton FD1040L
• Voltage rating: 347V
• Amperage rating: 40A
• Poles: 1-pole
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Purpose: Branch circuit overcurrent and short-circuit protection

Ideal scenarios and practical use

• Protect distribution circuits in commercial lighting panels that operate at 347V, ensuring reliable shutoff during fault conditions.
• Integrate into panelboards where vibration or equipment movement is a concern, leveraging the bolt-on mounting for a longevity-focused installation.
• Upgrade or replace aging protection devices in light industrial setups that require a 40A, single-pole solution with OEM compatibility.

What you gain with the Eaton FD1040L

• Peace of mind from a proven thermal-magnetic protection scheme that responds predictably to faults, helping minimize downtime and equipment wear.
• Streamlined maintenance and replacements due to OEM-part compatibility, reducing mismatch risk during service or upgrades.
• Clear, dependable protection for a broad range of 347V circuits without compromising on form factor or mounting approach.