Square D FA340701021 - 70 A, 480 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D FA340701021: a 70A, 480V, 3-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and loadcenters. With a fast plug-in connection, it minimizes install time and downtime during replacements or upgrades, making service tasks smoother for electricians and facilities managers alike.

Why this breaker stands out

• Rapid plug-in installation: The plug-in design streamlines mounting and removal, so technicians can complete panel servicing with confidence and speed.
• Thermal-magnetic protection: A robust trip unit combines thermal and magnetic sensing for stable, repeatable protection across temperature variations, plus instantaneous magnetic trip for short-circuit events.
• OEM-compatible: Engineered to be compatible with matching Square D OEM loadcenters and panelboards, ensuring reliable operation and coordinated protection schemes.
• Versatile applications: Ideal for residential, commercial, and light industrial installations where reliable 70A protection at 480V is required.

What this means for your electrical system

In a panelboard or loadcenter, this 3-pole device guards multiple phases against overcurrent and short circuits, helping prevent wire overheating, component damage, and electrical fire risks. Its precise trip characteristics mean predictable behavior during fault conditions, aiding in safer maintenance windows and quicker fault isolation.

Technical snapshot

• Manufacturer: Square D
• Part number: FA340701021
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 70 A
• Voltage rating: 480 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or replacing breakers in commercial panelboards serving office spaces, retail environments, or light industrial equipment rooms.
• Installing a reliable protection point for high-demand 480V circuits in distributed systems and subpanels.
• Coordinating with other Square D devices to establish a consistent protection scheme across a facility.

Practical considerations

Before swapping in this breaker, confirm that your panelboard is rated for 480V and that the FA340701021 is compatible with your exact loadcenter model from Square D. Follow proper lockout/tagout procedures and consult the panel’s documentation to ensure correct trip characteristics and UL/CSA compliance.