Square D EJB24100 - 100 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EJB24100—a 100 A, 480 V, 2-pole bolt-on molded case circuit breaker built to shield your panelboards and load centers from overcurrent and short-circuit events. Designed for reliable protection across residential, commercial, and light industrial applications, this breaker is engineered to perform when it matters most.

• Secure bolt-on mounting: A rigid, vibration-resistant bus connection minimizes movement and arcing, delivering dependable electrical integrity even in environments with vibration or heavy loads.
• Thermal-magnetic trip unit: Combines thermal protection for overloads with magnetic protection for fast short-circuit disconnections, delivering stable, repeatable protection performance you can rely on.
• OEM-ready compatibility: Specifically designed to match Square D load centers and panelboards, ensuring precise fit, correct trip curves, and streamlined field replacement.
• Versatile electrical protection: Ideal for branch circuit overcurrent and short-circuit protection in a wide range of installations—from home electrical panels to commercial distribution systems and light industrial panels.

What makes the EJB24100 stand out is not just its specs, but how it fits into real-world electrical designs. When you’re upgrading or maintaining a panel, you need a breaker that installs quickly without sacrificing safety. The bolt-on design minimizes installation fiddliness, while the thermal-magnetic trip unit provides consistent protection across varying ambient temperatures and load conditions.

Product highlights and specifications

• Manufacturer: Square D
• Part Number: EJB24100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 480 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading or replacing breakers in existing Square D panelboards and load centers to maintain accurate protection curves and reliable operation.
• Installing in commercial or light industrial panels where 480 V systems and 2-pole protection are required.
• Serving as a robust, maintenance-friendly solution in environments subject to vibration or mechanical stress, thanks to secure bolt-on mounting.

Practical tips for installation and long-term reliability

• Ensure proper torque on the bolt-on mounting to maximize the rigidity of the bus connection and minimize connection looseness over time.
• Verify compatibility with your existing OEM load centers and panelboards to maintain consistent protection characteristics.
• Use in panels designed for 480 V systems to avoid nuisance trips or insulation issues—this breaker is purpose-built for that voltage class.
• Schedule periodic inspections of connections and the mounting hardware in environments with vibration or temperature cycling to sustain long-term performance.

The Square D EJB24100 is a purpose-built solution for those who demand reliable branch circuit protection without compromises. With its bolt-on precision, thermal-magnetic protection, and OEM-ready compatibility, it’s a prudent choice for safeguarding electrical systems in a wide range of setups.