Square D EJB34030 - 30 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Square D EJB34030 — a 30 A, 480 V, 3-pole bolt-on molded case circuit breaker designed to shield your electrical system from overcurrent and short-circuit events. Built for dependable protection in panelboards and load centers, this unit delivers a secure, vibration-resistant connection and precise trip behavior you can trust when it matters most.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing the risk of loose terms or intermittent contacts in environments with movement or vibration.
• Thermal-magnetic trip unit combines thermal overload protection with magnetic short-circuit protection, delivering fast, predictable tripping across a wide range of operating conditions.
• 3-pole design for 3-phase systems ideal for commercial and light industrial setups that run on three-phase power, helping protect motors, lighting, and feeders.
• High-voltage capability rated at 480 V, making it suitable for mid-to-large commercial installations and industrial panels.
• OEM-compatible engineered to work with matching Square D OEM panelboards and load centers, ensuring proper fit, coordination, and reliable performance.
• Dedicated branch circuit protection—specifically suited for overcurrent and short-circuit protection in panelboards and load centers, helping you maintain electrical safety and continuity.

Ideal applications and use cases

Designed for residential, commercial, and light industrial environments, the EJB34030 fits seamlessly into panelboard upgrades, new installations, or panel maintenance where a robust 3-pole, 30 A protection device is required. Use it to safeguard:

• 3-phase motors and equipment feeders in small manufacturing or processing facilities
• HVAC and cooling system feeders in commercial buildings
• Lighting and power distribution in mid-sized commercial spaces
• Building automation and control circuits that demand reliable short-circuit protection

What you gain with this breaker

Beyond simple specs, the EJB34030 delivers practical value that translates to fewer maintenance calls and more consistent protection. The bolt-on design minimizes installation annoyance and maintenance downtime, while the thermal-magnetic trip unit reduces nuisance trips caused by brief temperature fluctuations or surges. Matching OEM compatibility means you won’t gamble on fit or electrical coordination, giving you confidence during upgrades or replacements.

Specifications at a glance

• Manufacturer: Square D
• Part Number: EJB34030
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30 A
• Voltage Rating: 480 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Equip your electrical ensemble with the Square D EJB34030 to ensure robust, reliable protection for 3-phase systems in panelboards and load centers. Its combination of secure mounting, precise trip performance, and OEM compatibility makes it a thoughtful, long-lasting choice for demanding residential, commercial, and light industrial applications.