Square D EJB34020 - 20 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EJB34020 — a reliable 20A, 480V, 3-pole bolt-on molded case circuit breaker designed to protect your electrical builds with precision. Built for panelboards and load centers, this unit secures your 3-phase distribution with a rugged bolt-on mounting that creates a rigid, vibration-resistant bus connection, so protection stays steady no matter the environment.

Why this breaker stands out

• Secure bolt-on mounting ensures a tight, vibration-resistant bus connection that holds up in busy electrical rooms and equipment cabinets.
• Thermal-magnetic trip unit delivers stable, repeatable protection: the thermal element responds to gradual overloads, while the magnetic element snaps into action for short circuits.
• OEM-compatible design works seamlessly with matching Square D OEM load centers and panelboards, simplifying replacement and upgrades.
• Versatility across applications suitable for residential, commercial, and light industrial settings where 3-phase 480V distribution is standard.

Technical snapshot

• Manufacturer: Square D
• Part Number: EJB34020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 480V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• New installations in commercial spaces with 3-phase 480V distribution — industrial panels, data centers, and large HVAC systems benefit from reliable protection.
• Retrofits or replacements in OEM load centers and panelboards where a matching Square D unit is required for compatibility.
• Enclosures in environments with vibration or movement where a secure bolt-on connection minimizes loosening and maintains protection performance.

Who should consider the Square D EJB34020

Electrical contractors, facilities managers, and panel-building technicians looking for a proven, OEM-compatible solution for dependable overcurrent and short-circuit protection in 3-phase systems will find this breaker a precise fit. It’s engineered to coordinate with existing Square D panels, reducing wiring complexity and downtime during installation or upgrades.

Practical notes and optimization tips

• Confirm panelboard compatibility with the EJB34020’s bolt-on mounting to ensure a proper fit and secure connection.
• Use in applications where stable 3-pole protection at 480V is required to safeguard motors, controllers, and other 3-phase equipment.
• Plan replacements around OEM specifications to maintain protective coordination and warranty integrity.

Choose the Square D EJB34020 for dependable, three-phase protection that stands up to vibration and demanding industrial environments. Order today through AmpState to ensure quick availability and OEM-aligned performance in your next panel or load center project.