Square D ECB14030G3 - 30 A, 1-Pole Bolt-On Circuit Breaker | AmpState

The Square D ECB14030G3 is a 30A, 1-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit protection in panelboards and loadcenters. Built for stability and long-term reliability, this unit provides clear, repeatable protection for everyday electrical systems in homes, small offices, and light-industrial spaces.

Why this breaker stands out

• Secure bolt-on mounting: A robust mounting design ensures a rigid, vibration-resistant connection to the bus, reducing movement and maintaining consistent electrical contact over time.
• Thermal-magnetic trip unit: Combines precise thermal overload protection with fast magnetic response for short-circuits, delivering stable, predictable protection curves that help prevent nuisance trips and equipment damage.
• OEM-compatible: Specifically designed to be compatible with matching Square D OEM loadcenters and panelboards, offering plug-and-play reliability and straightforward field servicing.
• Compact molded-case construction: The 30A, 1-pole format provides targeted protection for standard 120V circuits common in residential and light commercial applications, without unnecessary bulk.
• Versatile application: Ideal for residential wiring upgrades, small commercial setups, and light industrial environments that rely on consistent branch-circuit protection and quick, clear fault isolation.

Technical snapshot

• Manufacturer: Square D
• Part Number: ECB14030G3
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Residential panels: Safeguard lighting and receptacle circuits on a dedicated 30A feed, helping to isolate faults quickly and protect both wiring and devices.

Small commercial panelboards: Protect individual branches supplying lighting, outlets, or equipment where single-pole protection and a reliable bolt-on connection streamline installation and maintenance.

Light industrial environments: Support single-phase circuits that require robust overcurrent protection with a compact form factor and dependable trip performance.

How this compares and why it matters

Compared with other breakers, the ECB14030G3’s bolt-on design reduces the chances of loose connections in vibration-prone installations, while the thermal-magnetic trip unit provides a balanced approach to protection—responding promptly to short circuits and maintaining stable performance during normal operation. Its OEM compatibility means you can replace or upgrade within existing Square D panelboards with confidence, minimizing compatibility concerns and downtime.

Tips for optimum performance

• Match this 30A, 1-pole breaker to a compatible Square D panelboard or loadcenter to ensure reliable operation and proper clearance around the device.
• Follow standard electrical practices for bolt-on mounting Torque and securing procedures to maintain a solid bus connection.
• Use this unit for circuits that require clear protection against both overloads and short-circuits, particularly in environments with varying load conditions.