FB3040 - 40Amp Circuit Breaker

FB3040 - 40Amp Circuit Breaker

Electrical equipment doesn't always need to be replaced—sometimes the right breaker is all that's needed to get a panel back into service. If you're replacing an existing FB breaker, the FB3040 offers the same 40 Amp, 3-pole configuration needed for a form, fit, and functional replacement in compatible equipment. That means less time spent modifying an installation and more confidence that the replacement matches the system it was built for.

This breaker uses a thermal-magnetic trip system to protect electrical circuits in two ways. The thermal element responds to overloads that develop over time, while the magnetic element reacts almost instantly when a short circuit or high fault current occurs.

Key Features and Benefits

• Form, fit, and functional replacement for compatible FB electrical systems
• 40 Amp, 3-pole thermal-magnetic circuit breaker
• Thermal trip protection helps respond to sustained overload conditions
• Magnetic trip protection reacts quickly during short-circuit events
• Factory-installed non-interchangeable trip unit
• Interrupting ratings of 14kA at 480VAC and 25kA at 240VAC
• Rated for operation in ambient temperatures up to 40°C
• Includes load terminals
• Built to last for continued use in compatible legacy electrical systems

Technical Specifications

• Part Number: FB3040
  
• Type: FB
  
• Circuit Breaker Type: Thermal-Magnetic
  
• Amperage: 40 Amps
  
• Poles: 3
  
• Interrupting Rating: 14kA @ 480VAC; 25kA @ 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Ambient Rating: 40°C
  
• Load Terminals: Included
  
• Dimensions:
  • Height: 6.00"
  • Width: 4.13"
  • Depth: 3.38"
• Dimensions: 4.13"W × 6.00"H × 3.38"D
  
• Approximate Shipping Weight: 5.50 lbs.
  

Material Compliance and Certifications

No material compliance or certification information has been provided for the FB3040. Before installation, verify that the breaker's electrical ratings, physical dimensions, and terminal configuration match the equipment being serviced. Installation should be completed by a qualified electrician in accordance with the National Electrical Code (NEC), applicable local codes, and the original equipment manufacturer's recommendations.

Where It Works Best

The FB3040 is commonly used in compatible FB panelboards and electrical distribution equipment found in manufacturing facilities, commercial buildings, institutional properties, and industrial environments. It's well suited for three-phase branch circuits serving HVAC equipment, pumps, motors, compressors, lighting systems, and general power distribution where maintaining the original equipment configuration is the priority.