FHL36040 - 40 Amp Circuit Breaker

FHL36040 - 40 Amp Circuit Breaker

When a circuit breaker reaches the end of its service life or trips because of a fault, the goal isn't to find "something close"—it's to install the correct replacement that keeps your existing electrical distribution system operating as designed. The Square D FHL36040 is built for that purpose. Matching the original catalog number, 40 Amp rating, 600V AC voltage, 3-pole configuration, breaking capacity code, and unit mount design helps maintain the original form, fit, and function of compatible Square D equipment. That's why experienced electricians, maintenance professionals, and facility managers know it's important to verify every specification—not just the amperage—before replacing a circuit breaker.

Key Features and Benefits

• Genuine Square D FHL36040 thermal magnetic circuit breaker
• 40 Amp continuous current rating
• Three-pole design for three-phase electrical systems
• 600V AC voltage rating
• Thermal-magnetic trip technology provides overload and short-circuit protection
• Unit mount configuration for compatible Square D I-Line panelboards
• Line and load lug electrical connections
• HACR rated for heating, air conditioning, and refrigeration equipment
• Helps maintain the original form, fit, and function of existing equipment
• Designed for maintaining commercial and industrial electrical distribution systems
• Built to last for long service life
  

Technical Specifications

• Catalog Number: FHL36040
  
• Manufacturer: Square D
  
• Product Type: Circuit Breaker
  
• Series: FHL
  
• Trip Unit Technology: Thermal-Magnetic
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 600V AC
  
• Number of Poles: 3
  
• Phase Connection: ABC (Three-Phase)
  
• Breaking Capacity Code: H
  
• Mounting Style: Unit Mount
  
• Electrical Connections: Line Lugs and Load Lugs
  
• Terminal Identifier: AL100FA
  
• Magnetic Hold Current: 400 Amps
  
• Magnetic Trip Current: 850 Amps
  
• Application Rating: HACR Rated
  
• Dimensions: 6.40 in. H × 4.50 in. W × 4.13 in. D
  
• Certifications: UL Listed, CSA Certified
  

Material Compliance and Certifications

The Square D FHL36040 is UL Listed and CSA Certified, demonstrating compliance with recognized North American electrical safety standards. It is intended for installation in compatible electrical equipment and should be installed in accordance with the National Electrical Code (NEC) and all applicable local electrical codes.

Where It Works Best

• Compatible Square D I-Line panelboards
• Commercial office buildings
• Industrial manufacturing facilities
• Commercial electrical systems
• Industrial electrical systems
• HVAC systems
• Heating and air conditioning equipment
• Refrigeration systems
• Pumps and compressors
• Three-phase motor circuits
• Manufacturing and process equipment
• Branch circuit protection