Square D EJB34050 - 50 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EJB34050—a dependable 50A, 480V, 3-pole bolt-on molded case circuit breaker designed to guard branch circuits in panelboards and load centers. Built for reliable overcurrent and short-circuit protection, it’s a robust choice for three-phase systems in commercial, residential, and light industrial environments.

What makes this breaker stand out?

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the panel bus, helping prevent loosening and ensuring consistent performance in environments with vibration or shifting loads.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal overload sensing with instantaneous magnetic tripping for short circuits, reducing nuisance trips and protecting downstream equipment.
• OEM-compatible design is engineered to integrate with matching Square D load centers and panelboards, enabling straightforward replacement or retrofit without adapters or custom wiring.
• Three-pole, 50A, 480V configuration is ideal for three-phase distribution, suitable for motor circuits, HVAC feeds, pumps, and other common commercial or light-industrial loads.
• Molded-case construction combines durability with compact protection, making it a reliable choice for demanding electrical installations.

Ideal use scenarios include upgrading or expanding panelboards in commercial buildings, integrating new three-phase equipment in light-industrial setups, or replacing worn breakers in existing OEM systems where compatibility matters. With its bolt-on form factor and matching OEM compatibility, the EJB34050 simplifies installation and minimizes downtime.

Technical specifications

• Manufacturer: Square D
• Part Number: EJB34050
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 50 A
• Voltage rating: 480 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

In short, the Square D EJB34050 delivers solid, industry-tested protection with a installation-friendly, OEM-aligned design. It’s the practical, reliable choice for safeguarding three-phase circuits in panelboards and load centers—today and for the life of your electrical system.