Eaton BAB2040 - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Eaton BAB2040 is a 40A, 240V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Its robust construction and precise engineering make it a dependable choice for demanding electrical configurations.

Why this matters

• Secure bolt-on mounting: Delivers a rigid, vibration-resistant bus connection that helps prevent loose connections and arcing in environments with vibrations or movement.
• Thermal-magnetic trip unit: Provides stable, repeatable protection by combining thermal overload protection with magnetic short-circuit protection, reducing nuisance trips and safeguarding circuits.
• Compatibility: Designed to work with matching OEM load centers and panelboards, ensuring a seamless, code-compliant installation.
• Versatile applications: Suitable for residential, commercial, and light industrial settings where a reliable 240V, 2-pole solution is required.

Key specifications at a glance

• Manufacturer: Eaton
• Part Number: BAB2040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading or replacing a failed 240V breaker in residential panelboards powering heavy appliances like electric water heaters, air conditioners, or electric ranges.
• Commercial panels requiring a reliable 40A, 240V, two-pole protection for equipment such as refrigeration units, compressors, or large lighting setups.
• Light industrial installations where vibration resistance and secure bus connections improve long-term reliability.

What sets it apart from other breakers

The combination of bolt-on mounting, a vibration-resistant bus connection, and a thermal-magnetic trip makes the BAB2040 a durable, long-lasting choice for panel installations where stability and protection matter most. Its OEM-compatible design means you can trust a straightforward swap in compatible loadcenters, minimizing downtime and maximizing circuit safety without compromising performance.

Practical tips for installation and use

• Confirm your panelboard accepts bolt-on, 2-pole breakers of this rating and style before installation.
• Power must be fully shut off before servicing; follow panelboard manufacturer guidelines for wiring and securing the breaker.
• Ensure conductor sizes and insulation are appropriate for a 240V, 40A circuit and that grounding and bonding practices meet local codes.
• Use this breaker where stable, repeatable protection against both overloads and short circuits is essential, especially in environments with moderate vibration or equipment start-ups.