Square D FA320901021 90A 3-Pole 240 V Circuit Breaker

Meet the Square D FA320901021 90A 3-Pole 240 V Circuit Breaker — a purpose-built protection solution designed for demanding three-phase electrical systems. This unit delivers reliable overload and short-circuit protection for commercial and light industrial applications, helping keep equipment and personnel safe while minimizing downtime.

Key specifications

• Current rating: 90 A
• Poles: 3
• Voltage rating: 240 V
• Part number: FA320901021

Why a 3-pole 240 V breaker matters

In three-phase environments, a 3-pole breaker protects all three hot conductors, delivering simultaneous disconnection during faults and preventing unbalanced loads. The 90 A rating makes it well-suited for protecting motors, pumps, conveyors, and other heavy loads commonly found in commercial equipment rooms and light industrial setups.

Who should consider it

Electricians, facilities managers, and maintenance teams who work with Square D panels or systems that require a precise 90 A, 3-pole, 240 V protective device will find this model a reliable fit for upgrading or replacing aging protection equipment.

Use cases

• Three-phase motor protection for pumps, fans, and conveyors
• Protection for heavy-load equipment operating at up to 90 A per phase
• Protective device in electrical closets and switchgear where reliable interruption is critical

Before you buy: compatibility and considerations

Ensure your panel is designed to accept a three-pole, 240 V protective device of this type and that wiring ratings match with a 90 A conductor setup. Verify overall system compatibility to ensure seamless replacement or installation within your existing Square D infrastructure.

Installation and safety tips

Install by a qualified electrician following local electrical codes. When replacing or adding this breaker, de-energize the panel and follow established safety practices. Use appropriate tools and refer to your panel’s mounting and bus design guidelines to ensure a secure, reliable connection.

Maintenance and longevity

With proper installation and operation within its rated capacity, the Square D FA320901021 can provide dependable protection for years, helping to prevent costly equipment damage and unplanned outages.