Square D EJB14050 - 50 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Square D EJB14050 — a 50 A, 277 V, 1‑pole bolt‑on molded case circuit breaker from AmpState. Built to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and loadcenters, it’s engineered for performance where it matters most—reliability, safety, and long service life in commercial and light industrial environments.

Why this 1-pole bolt‑on breaker stands out

• Secure bolt‑on mounting provides a rigid, vibration‑resistant bus connection, minimizing the risk of loose connections that can lead to overheating and nuisance trips in panels and enclosures installed in busy or demanding spaces.
• Thermal‑magnetic trip unit offers stable, repeatable protection across a range of temperatures and loads. It detects both overloads and short circuits quickly, helping to prevent equipment damage and unplanned downtime.
• OEM‑compatibility is built in—designed to pair with matching Square D OEM loadcenters and panelboards for straightforward installation and dependable coordination with existing protections.
• Versatile application suited for residential, commercial, and light industrial settings where 277 V circuits require solid protection, such as lighting, small equipment feeds, and control circuits.

Technical snapshot

• Manufacturer: Square D
• Part Number: EJB14050
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 50 A
• Voltage Rating: 277 V
• Number of Poles: 1
• Mounting Style: Bolt‑on
• Application: Branch circuit overcurrent and short‑circuit protection

Ideal use cases

• 277 V lighting feeders in office buildings, retail spaces, and other commercial facilities
• Subpanels and main distribution panels in light industrial environments
• retrofit projects where OEM panelboards require precise compatibility and reliable protection

Practical guidance for installation and use

Plan for a clean, direct bus connection with the bolt‑on terminals to maximize the breaker’s vibration resistance. Verify compatibility with the existing panelboard or loadcenter, and follow manufacturer torque specifications during mounting. For ongoing reliability, perform periodic visual inspections for secure connections and signs of wear or heat during routine panel maintenance.

What problems this solves

• Reduces the risk of nuisance trips due to vibration or loose bus connections in dynamic environments
• Delivers predictable, thermal‑magnetic protection to safeguard wiring, lighting circuits, and small equipment from overloads and short circuits
• Streamlines installations by aligning with OEM panel designs, minimizing compatibility headaches

Choose the Square D EJB14050 when you need a robust, 50‑amp, 277‑volt, 1‑pole bolt‑on circuit breaker that delivers dependable protection, straightforward installation, and long‑term reliability in commercial and light industrial electrical systems.