Square D FAL34040 Circuit Breaker

Square D FAL34040 is a three-pole, 40-amp molded-case circuit breaker rated for 480V AC, designed for industrial and commercial panelboards and switchgear. The FAL family uses thermal-magnetic trip technology with separate long-time and instantaneous trip elements to protect conductors and equipment from overloads and short circuits in 50/60 Hz systems. It carries an 18 kA interrupting capacity at 480V (18,000 AIC), enabling rapid fault interruption for distributed loads. The device is configured with line and load lug terminals and support for feed-through arrangements, simplifying subfeed or downstream panel connections. As a Square D product, the FAL34040 carries UL and CSA listings and is explicitly a 3P device, serving three-phase circuits in 480V installations. Typical applications include motor feeders, distribution circuits in manufacturing sites, large HVAC or processing equipment, and other 480V, 40A protection scenarios where dependable short-circuit protection is required. When selecting a breaker in 480V systems, ensure compatibility with the panelboard or switchgear family and observe the manufacturer’s installation instructions and applicable electrical codes.