Square D EJB16030 - 30 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Square D EJB16030 is a 30A, 347V, 1-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection inside panelboards and load centers. Built for steady performance in residential, commercial, and light industrial applications, this device combines a rugged mounting method with precise protection characteristics to keep electrical systems safe and you up and running.

• Secure bolt-on mounting: Provides a rigid, vibration-resistant connection to the bus, reducing the risk of loosening and ensuring stable electrical contact in environments with equipment movement.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding to both sustained overcurrent and instantaneous short-circuit conditions, even as ambient temperatures fluctuate.
• OEM-compatible design: Engineered to pair with matching Square D OEM load centers and panelboards for straightforward replacement and dependable electrical fitment.
• Versatile 30A protection: Ideal for protecting individual circuits in lighting, receptacle runs, small feeders, and control circuits without overprotecting downstream equipment.
• Broad suitability: Ready for residential panels, commercial spaces, and light industrial installations that use 347V distribution schemes.

• Manufacturer: Square D
• Part Number: EJB16030
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30 A
• Voltage Rating: 347 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is purpose-built to minimize nuisance trips while delivering dependable protection when it matters most. The bolt-on installation makes it a practical choice for service upgrades, panelboard refurbishments, or new installations where a secure, vibration-resistant connection is crucial. The combination of a thermal-magnetic trip unit and a 30A rating ensures reliable discrimination between harmless inrush currents and dangerous fault conditions, helping protect wiring, devices, and downstream equipment.

Who should consider the Square D EJB16030? Electricians, facility managers, and contractors working with panelboards or load centers configured for 347V systems will find this breaker a precise, compatible match for protecting individual circuits in commercial spaces, light industrial facilities, or residential panels where 30A protection is appropriate.

Practical use scenarios include upgrading a panelboard to add a dedicated 30A circuit for a high-load appliance, protecting a lighting and receptacle run in a small commercial suite, or replacing an aging breaker in a compatible OEM panel center where bolt-on mounting is standard. With its robust mounting and reliable thermal-magnetic protection, this unit helps maintain safe, continuous operation across diverse applications.