Square D EJB14020 - 20 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Square D EJB14020 stands out as a purpose-built solution for reliable branch circuit protection in panelboards and loadcenters. This 20A, 277V, 1-pole bolt-on molded case circuit breaker is engineered to keep critical electrical circuits safe from overloads and short circuits, even in demanding environments.

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays tight through equipment movement and operation, helping to prevent arc faults and connection drift.
• Thermal-magnetic trip unit: combines precise thermal overload sensing with rapid magnetic tripping for short-circuit events, delivering stable, repeatable protection without nuisance trips.
• OEM-compatible design: engineered to integrate seamlessly with matching Square D OEM panelboards and loadcenters, ensuring proper fit, coordinated trip characteristics, and straightforward serviceability.
• Versatile applications: ideal for residential, commercial, and light industrial settings where 277V distribution and 20A circuits are common—think lighting feeders, small power circuits, and control circuits in medium-capacity panels.

Technical snapshot

• Manufacturer: Square D
• Part number: EJB14020
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20 A
• Voltage rating: 277 V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection in panelboards/loadcenters

Who should consider the Square D EJB14020? • Electrical professionals outfitting commercial or light industrial panels where 277V circuits are standard. • Property managers upgrading or maintaining panelboards in office buildings, hospitals, retail centers, or light manufacturing facilities. • Technicians seeking a dependable, OEM-compatible breaker that minimizes installation risk and supports long-term reliability.

Why this matters in real-world use: a robust bolt-on configuration reduces the likelihood of loose connections in vibration-prone environments, while the thermal-magnetic trip delivers consistent protection against both overloads and short circuits. When you need a dependable, manufacturer-minned breaker that fits your Square D panelboard exactly, the EJB14020 is engineered to perform and endure.

Tips for optimal use: verify panelboard compatibility with the EJB14020’s 20A, 277V, 1-pole specifications, ensure correct torque during installation, and pair with other OEM components to maintain coordinated protection across the entire distribution system. This approach helps prolong equipment life, reduce downtime, and keep critical circuits running smoothly.