Square D EJB36045 - 45 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EJB36045 — a purpose-built, 3-pole bolt-on molded case circuit breaker designed to protect your panelboards and load centers with steady, reliable performance. Rated at 45 A and 600 V, this unit is engineered for sturdy branch circuit overcurrent and short-circuit protection in residential, commercial, and light industrial environments.

Key advantages that set the EJB36045 apart:

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the bus, reducing connection loosening in demanding installations.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining overload sensing with instantaneous short-circuit response, helping to minimize nuisance trips while safeguarding conductors and equipment.
• 3-pole design supports three-phase circuits, essential for balanced load distribution in commercial and light industrial panel systems.
• OEM loadcenter compatibility ensures seamless integration with matching Square D load centers and panelboards, simplifying retrofits and new builds alike.
• Versatile applicability suited for a range of installations—from multi-family residential panels to small commercial service equipment and light industrial control panels.

Technical snapshot

• Manufacturer: Square D
• Part Number: EJB36045
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who should consider this breaker?

Electricians, facility managers, and maintenance professionals who work with Square D panelboards or compatible OEM enclosures will appreciate the EJB36045’s dependable performance, straightforward bolt-on installation, and the assurance of consistent protection across a range of environments.

Use cases and practical considerations

Use the Square D EJB36045 in three-phase distribution panels feeding commercial equipment, light industrial machinery, or multi-zone commercial lighting where a robust, 45 A protection device is appropriate. Its bolt-on mounting is ideal for installations where vibration resistance and a solid bus connection are priorities, helping maintain electrical integrity in panels exposed to movement or cycling loads. Pair it with compatible loadcenters to ensure labeling, coordination, and protection align with your system’s design requirements.

In short, the Square D EJB36045 45 A, 600 V, 3-pole bolt-on circuit breaker delivers dependable branch circuit protection, reliable trip performance, and seamless compatibility with OEM panel solutions — a smart, durable choice for ensuring electrical safety and system reliability in a variety of settings.