FH36040 - 40 Amp Circuit Breaker

FH36040 - 40 Amp Circuit Breaker

Finding the correct replacement circuit breaker is essential when maintaining an existing Square D I-Line™ electrical distribution system. The Square D FH36040 is a 40 Amp, 3-pole thermal magnetic circuit breaker designed to provide the proper form, fit, and function for compatible Square D I-Line panelboards and switchboards operating on systems rated up to 600V AC. Matching the original catalog number helps preserve the integrity of the existing installation while minimizing unnecessary modifications during maintenance or repair. Whether you're replacing a breaker as part of scheduled preventative maintenance or restoring service after a failed device, the FH36040 is built to last and is intended to maintain the original protection characteristics of your electrical distribution equipment.

Key Features and Benefits

• Genuine Square D FH36040 thermal magnetic circuit breaker
• 40 Amp continuous current rating
• Three-pole configuration for three-phase electrical systems
• Rated for applications up to 600V AC
• Designed for compatible Square D I-Line panelboards and switchboards
• I-Line mounting for proper replacement in existing equipment
• Thermal magnetic trip unit provides overload and short-circuit protection
• HACR rated for heating, air conditioning, and refrigeration applications
• 400 Amp magnetic hold current
• 850 Amp magnetic trip current
• I-Line line connection with load-side lug terminals
• Built to last for long service life in commercial and industrial electrical systems
• Helps maintain original form, fit, and function when replacing an existing FH-series breaker
  

Technical Specifications

• Catalog Number: FH36040
  
• Manufacturer: Square D
  
• Product Type: Circuit Breaker
  
• Series: FH
  
• Trip Unit Technology: Thermal Magnetic
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 600V AC
  
• Number of Poles: 3
  
• Phase Connection: ABC
  
• Breaking Capacity Code: H
  
• Mounting Style: I-Line
  
• Electrical Connections: I-Line connection (line); lugs (load)
  
• Terminal Identifier: AL100FA
  
• Magnetic Hold Current: 400 Amps
  
• Magnetic Trip Current: 850 Amps
  
• Application Rating: HACR Rated
  
• Dimensions: 6.4 in. H × 4.5 in. W × 4.13 in. D
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Square D FH36040 is UL Listed and CSA Certified for installation in compatible Square D I-Line electrical distribution equipment. It is intended for replacement and maintenance applications and should be installed by qualified electrical personnel in accordance with the National Electrical Code (NEC) and all applicable local electrical codes and accepted electrical safety practices.

Where It Works Best

• Compatible Square D I-Line panelboards and switchboards
• Commercial office buildings
• Industrial manufacturing facilities
• HVAC and refrigeration systems
• Three-phase motor circuits
• Pumps and air compressor installations
• Manufacturing and processing equipment
• Branch circuit protection
• Electrical maintenance and retrofit projects
• Replacement of existing Square D FH-series circuit breakers