FA24040AB - 40 Amp Circuit Breaker

FA24040AB - 40 Amp Circuit Breaker

The FA24040AB circuit breaker from Schneider Electric offers dependable electrical protection with the performance your systems demand. Engineered for 40 A at 480 V in a 2-pole, single-phase setup, this I-Line-mount breaker is designed to keep your power distribution safe and efficient. It combines a thermal-magnetic trip mechanism with a compact footprint (6.4 in × 3 in × 4.13 in) that fits standard panels while delivering serious protection in both commercial and industrial settings. Whether you’re upgrading an HVAC feed or safeguarding a branch circuit in a facility, the FA24040AB brings high-interrupt capability and proven quality to the job.

Key Features and Benefits

• Thermal-magnetic trip unit: gives long-time overload and instantaneous short-circuit protection, helping to reduce risk of circuit damage or fire.
• I-Line mounting design: enables fast, straightforward installation in compatible panels, minimizing downtime.
• High interrupt capacity: rated for 18 kA at 480 V and up to 25 kA at 240 V AC, this breaker can handle high fault levels with confidence.
• Phase connection type AB and plug-in style: aligns with many panelboard configurations, making retrofits and new installations smoother.
• Manufacturer credibility: Schneider Electric/Square D is a recognized leader in power distribution equipment, ensuring you’re working with a trusted brand.

Technical Specifications

• Rated Current: 40 A
• Rated Voltage: 480 V AC (also suitable for 250 V DC)
• Poles: 2-pole (single-phase)
• Mounting Mode: I-Line plug-in style
• Interrupting Capacity:
  • 18 kA at 480 V
  • 25 kA at 240 V
  • 10 kA at 250 V DC
• Magnetic Hold Current: 400 A; Magnetic Tripping Current: 850 A
• Dimensions:
  • Height: 6.4 in (162.6 mm)
  • Width: 3 in (76.2 mm)
  • Depth: 4.13 in (104.9 mm)
• Terminals: Line side I-Line connection; Load side lugs for copper (14-1/0 AWG) or aluminum (12-1/0 AWG) conductors.

Material Compliance and Certifications

• Industry Standards: The FA24040AB meets industry standards for safety and environmental compliance.
• UL and CSA: UL-listed and CSA certified for its electrical ratings.
• Green Premium Designation: Includes life-cycle transparency and material responsibility (including RoHS/REACH-style substance controls).

Where It Works Best

• This breaker is ideal in a broad range of installations: from light commercial switchboards to industrial machine circuits. Because it’s HACR-rated (Heating, Air Conditioning, Refrigeration) and supports AB-phase plug-in configurations, you’ll often see it in HVAC feeds, manufacturing floor control panels, or any application requiring a dependable 40 A protection device. Its compatibility with 14-1/0 AWG copper or 12-1/0 AWG aluminum wiring makes it flexible for renovation work or new installations alike.