QBHW2040S - 40 Amp Circuit Breaker

QBHW2040S - 40 Amp Circuit Breaker

Keep your electrical systems protected with the Eaton QBHW2040S, a two‑pole thermal‑magnetic breaker engineered for dependable performance in industrial and commercial settings. Built with a bolt‑on design and capable of handling 120V, 208V, and 240V loads, this circuit breaker is ideal when safety, efficiency, and durability matter. With a 22 kAIC interrupting rating and shunt‑trip option, it delivers solid protection against overloads and faults while allowing for controlled remote shutdowns when needed.

Key Features and Benefits

• Flexible Voltage Compatibility: Works flawlessly on 120V, 208V, and 240V AC systems, giving you the freedom to use it across diverse applications without swapping equipment. marselectric.com+2rspsupply.com+2
• Strong Fault Current Resistance: Rated for 22 kAIC, meaning it can safely interrupt high fault currents and reduce the risk of damage or threat to equipment. rspsupply.com+2Mouser Electronics+2
• Thermal‑Magnetic Trip Protection: Offers both thermal protection for long‑term overcurrent and magnetic protection for instant response to short circuits. marselectric.com+1
• Shunt‑Trip Capability: Enables remote disconnection when integrated with ancillary control systems, improving safety in emergency or automated shutdown scenarios. marselectric.com+1
• Bolt‑On Mounting: Simple installation due to its bolt‑on style, giving electrical professionals a fast setup with secure, stable mounting. rspsupply.com+1

Technical Specifications

• Model: QBHW2040S
• Amperage Rating: 40 A rspsupply.com+1
• Poles: 2‑Pole marselectric.com+1
• Voltage Rating: 120V / 208V / 240V AC marselectric.com+2rspsupply.com+2
• Interrupting Capacity: 22 kAIC rspsupply.com+1
• Trip Type: Thermal‑Magnetic with Shunt‑Trip option marselectric.com+1
• Mounting Method: Bolt‑On rspsupply.com+1
• Physical Size / Weight: Approx. 1 in width × 1 in height × 1 in depth; about 1 lb (exact dimensions from manufacturers) rspsupply.com+1

Material Compliance and Certifications

• UL Listed & CSA Certified: Complies with North American safety standards, ensuring quality manufacturing and reliable operation. rspsupply.com+1
• HACR‑Rated: Approved for use with heating, air conditioning, and refrigeration equipment, making this breaker appropriate for HVAC circuits and related systems. rspsupply.com+1
• Non‑Interchangeable Design: Ensures the breaker cannot be swapped with non‑compatible parts, maintaining safety and compliance. marselectric.com+1

Suitability

• In industrial plants and manufacturing facilities where multiple machines or heavy loads operate and demand precise protection against overloads and short circuits.
• In commercial buildings such as office complexes, retail spaces, or warehouses, especially on HVAC circuits or main feed runs needing high interrupting capacity.
• When upgrading older panels or replacing service entrance devices where bolt‑on mounting saves installation time and effort.
• In systems that require remote trip/shutdown capability—such as safety interlocks, emergency shutdown circuits, or automated control systems.