Eaton QBHW1045 - 45 A, 240 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Eaton QBHW1045 is a 45A, 240V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and load centers. Built for stability in demanding electrical environments, it combines a secure bolt-on mounting with precise thermal-magnetic protection to guard against overloads and short circuits.

Why this breaker stands out

• Secure bolt-on mounting: Delivers a rigid, vibration-resistant bus connection that stays tight through shocks and cycling, reducing the risk of loose connections and nuisance trips.
• Thermal-magnetic trip unit: Dual-element protection that responds to overloads (thermal) and short circuits (magnetic) for stable, repeatable protection performance.
• OEM-compatible: Designed to work with matching Eaton OEM load centers and panelboards, ensuring consistent fit and electrical characteristics.
• Versatile for multiple settings: Suitable for residential, commercial, and light industrial applications where reliable branch circuit protection is required.

What problems does it solve?

Whether you're upgrading an aging panel, replacing a failed breaker, or stocking a job with a reliable spare, the QBHW1045 provides predictable trip behavior and straightforward mounting. The bolt-on design helps ensure a solid connection in environments subject to vibration, temperature swings, or panel movement, while the 45A rating covers a wide range of branch circuits common in homes and small businesses.

Technical snapshot

• Manufacturer: Eaton
• Part number: QBHW1045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 45 A
• Voltage: 240 V
• Poles: 1
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Perfect for upgrading or expanding panelboards and load centers in:

• Residential service panels requiring reliable 1-pole protection for individual circuits
• Commercial spaces with compact branch circuits and space constraints
• Light industrial setups needing robust performance in a compact breaker

Tips for installation and maintenance

Ensure power is off before replacement, verify the bus connection is clean and undamaged, and torque the mounting screws to the panel manufacturer's specification to maintain the vibration resistance that the bolt-on design affords.

With the Eaton QBHW1045, you get dependable protection, precise trip characteristics, and a straightforward bolt-on installation that keeps your panel running safely and efficiently.