FA26040AB **Old Style** - 40 Amp Circuit Breaker

FA26040AB **Old Style** - 40 Amp Circuit Breaker

The FA26040AB is a dependable 40-amp, two-pole molded-case circuit breaker designed to deliver solid protection for demanding commercial and industrial applications. It’s built for situations where you cannot afford weak links in your electrical system: rated for up to 600 V and crafted with a thermal-magnetic trip mechanism, this breaker offers reliable overload and short-circuit protection. With its I-Line plug-in mounting style and 2-pole design the FA26040AB makes it easier to ensure correct installation and balanced load protection on 240 V or higher-voltage systems. Also, with interrupt capacities of around 25 kA at 240 V and 18 kA at 480 V, it’s engineered to handle serious fault situations.

Key Features and Benefits

• 40-amp capacity: strong enough to protect circuits feeding medium-sized motors, HVAC systems or industrial equipment without oversizing.
• Two-pole construction: safeguards both legs of a 240 V (or higher) circuit, providing balanced protection and minimizing nuisance trips.
• Molded-case design & thermal-magnetic trip unit: offers long-term performance and dependable fault response in harsh environments.
• High interrupt rating: capable of safely interrupting fault currents of up to approx. 25 kA at 240 V and 18 kA at 480 V (and 14 kA at 600 V) for extra peace of mind.
• I-Line plug-in mounting style: simplifies installation into compatible distribution panels, saving setup time and reducing wiring errors.
• Compact frame: fits modern panel layouts while still giving industrial-grade protection.

Technical Specifications

• Poles: 2 (two-pole)
  
• Current Rating: 40 A
  
• Voltage Rating: Up to 600 V AC (and 250 V DC in some specs)
  
• Interrupting Rating:
  • Approx. 25 kA at 240 V
  • 18 kA at 480 V
  • 14 kA at 600 V
• Trip Technology: Thermal-magnetic
  
• Frame Type: F-Frame molded case
  
• Mounting Style: I-Line plug-in
  
• Typical Dimensions:
  • Width: ~3.0″
  • Length: ~8.75″
  • Depth: ~4.38″

Material Compliance and Certifications

• UL Listed and CSA Certified: meets recognized safety and performance standards.
• Manufactured with materials rated for industrial use: beneficial in tougher environments where durability matters.
• Environment-friendly compliance (RoHS/REACH): and sustainability design considerations in production.

Where It Works Best

• This FA26040AB breaker shines in commercial or industrial electrical panels where you’ve got 2-pole circuits feeding critical equipment such as medium-sized motors, compressor units, HVAC systems, or large lighting loads. Its 40-amp rating gives you the flexibility to protect circuits that are too heavy for standard residential breakers but don’t require massive mega-amp equipment. Its high interrupt capacity makes it ideal in environments where fault currents can spike, such as manufacturing facilities, data center distribution blocks, or heavy-duty electrical rooms. It also works well for upgrade projects where older panels are being retrofitted with more reliable protection devices.