FH36045 - 45 Amp Circuit Breaker

FH36045 - 45 Amp Circuit Breaker

When you're servicing an existing Square D I-Line™ electrical distribution system, using the correct replacement breaker is essential for maintaining compatibility and preserving the original equipment design. The Square D FH36045 is a 45 Amp, 3-pole thermal magnetic circuit breaker engineered to provide the proper form, fit, and function for compatible Square D I-Line panelboards and switchboards rated for up to 600V AC. Matching the original catalog number helps ensure the breaker fits as intended while maintaining the electrical characteristics of the existing installation. Whether you're performing preventive maintenance, replacing a failed breaker, or keeping facility equipment operating reliably, the FH36045 is built to last and is designed for dependable service in existing electrical distribution systems.

Key Features and Benefits

• Genuine Square D FH36045 thermal magnetic circuit breaker
• 45 Amp continuous current rating
• Three-pole design 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 form, fit, and function replacement
• Thermal magnetic trip unit provides overload and short-circuit protection
• HACR rated for heating, air conditioning, and refrigeration equipment
• 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 compatibility with existing Square D electrical distribution equipment
  

Technical Specifications

• Catalog Number: FH36045
  
• Manufacturer: Square D
  
• Product Type: Circuit Breaker
  
• Series: FH
  
• Trip Unit Technology: Thermal Magnetic
  
• Amperage Rating: 45 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 FH36045 is UL Listed and CSA Certified for use 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), 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 repair projects
• Replacement of existing Square D FH-series circuit breakers