Square D EJB24030 - 30 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Square D EJB24030 is a 30-amp, 480-volt, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built to stay secure in environments where vibration or movement could loosen connections, this device uses a bolt-on mounting to ensure a rigid, dependable bus connection from the breaker straight to the panel.

Key benefits at a glance

• Secure bolt-on mounting: A robust mounting method that resists loosening from vibration, providing a consistently solid electrical connection and reducing nuisance trips caused by loose contacts.
• Thermal-magnetic trip unit: Combines two protection mechanisms—thermal overload protection for gradual heat buildup and magnetic trip for rapid disconnection during short circuits—yielding stable, repeatable protection performance.
• OEM compatibility: Designed to work with matching Square D OEM load centers and panelboards, ensuring straightforward installation and reliable coordination with existing equipment.
• Versatile application range: Suitable for residential, commercial, and light industrial projects where dependable 2-pole protection on a 480V supply is required.

Why this breaker makes sense for your panels

When you’re wiring or upgrading a panelboard or load center that feeds critical circuits, the EJB24030 provides a precise balance of safety and reliability. The 2-pole design ensures both hot legs are disconnected together, which is essential for maintaining safe shutdowns on 480V systems. With its bolt-on style, you won’t have to chase clip-in terms or worry about loose mounting—this breaker stays firmly seated where it belongs, even in high-vibration environments.

What’s inside the box (technical snapshot)

• Manufacturer: Square D
• Part Number: EJB24030
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and practical scenarios

Use the EJB24030 when you need reliable protection for branch circuits in 480V panel assemblies—such as commercial lighting, receptacle circuits, or motor circuits in light industrial settings. It’s a solid replacement or upgrade option for compatible Square D panelboards and load centers, delivering predictable trip behavior and a secure mechanical grip that resists loosening over time.

Tips for best results: confirm panel compatibility with the OEM lineup, follow all applicable electrical codes, and ensure proper torque on the bolts to maintain the integrity of the connection. The EJB24030 stands out for installations where vibration, long service life, and dependable protection are priorities, making it a practical, long-lasting choice for professional electrical work.