Square D EGB16045 - 45 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Square D EGB16045 is a 45A, 277V, 1-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for durability, this unit anchors securely with bolt-on mounting, creating a rigid, vibration-resistant bus connection that helps maintain consistent electrical performance even in demanding installations.

• Thermal-magnetic trip unit provides stable, repeatable protection across temperature changes and electrical noise, reducing nuisance trips while safeguarding equipment.
• 1-pole, 45A rating isolates a single branch circuit with precise protection for lighting, receptacle, and small-motor loads common in residential and light commercial setups.
• 277V operation makes it an ideal choice for commercial lighting circuits and other 277V applications where reliable protection is required.
• Bolt-on mounting delivers a secure, vibration-resistant connection to the bus, simplifying maintenance and long-term panel performance.
• OEM compatibility designed to work with matching Square D OEM load centers and panelboards, ensuring a smooth fit and straightforward replacement without adapters.
• Versatile applications suitable for residential, commercial, and light industrial environments, making it a practical choice for new installations or panel upgrades.

Why choose the Square D EGB16045 for your project? When reliability, precise tripping, and durable mounting matter, this breaker keeps critical circuits protected from overcurrent and short circuits. It’s especially well-suited for panelboards and load centers that demand a cohesive, OEM-aligned protection solution, minimizing compatibility concerns and installation time.

Who is this ideal for? Electricians and facilities managers working on 277V electrical distributions, panelboard modernizations, or residential subpanels that require dependable single-pole protection with a robust mounting method. It’s a strong match for projects where a compact, bolted solution enhances circuit security and reduces vibration-induced wear over the life of the installation.

Technical specifications at a glance

• Manufacturer: Square D
• Part Number: EGB16045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 277V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Square D EGB16045 for a dependable, OEM-aligned protection solution that pairs straightforward installation with steady, predictable performance across a range of residential, commercial, and light industrial applications.