HED42B040 - 40Amp Circuit Breaker

HED42B040 - 40Amp Circuit Breaker

The Siemens HED42B040 is a 40 Amp, two-pole thermal magnetic circuit breaker designed for Siemens SENTRON low voltage molded case circuit breaker systems using the ED frame design. This breaker is commonly selected for replacement and maintenance applications where matching the existing electrical equipment specifications is important. Maintaining the correct frame style, pole configuration, voltage rating, and terminal arrangement helps keep your compatible systems consistent without requiring changes to the original breaker layout.

Key Features and Benefits

• 40 Amp two-pole Siemens ED frame circuit breaker
• Thermal magnetic trip unit for overload and short-circuit protection
• Rated for 480V electrical systems
• Siemens SENTRON molded case circuit breaker design
• Load lugs only terminal configuration
• Accepts #10–1/0 AWG copper conductors
• Accepts #10–1/0 AWG aluminum conductors
• Meets UL 489 and IEC 60947-2 standards

Technical Specifications

• Catalog Number: HED42B040
  
• Product Type: Molded case circuit breaker
  
• Frame Type: ED Frame
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 480V
  
• Poles: 2
  
• Trip Unit: Thermal magnetic
  
• Interrupt Rating: 42kAIC at 480V
  
• Mounting Style: Panelboard mount
  
• Terminal Configuration: Load lugs only
  
• Wire Range: #10–1/0 AWG CU/AL
  
• Dimensions: 2 in W x 6.35 in H x 3.92 in D
  
• Weight: 2.551 lb
  
• UPC: 783643209992
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The Siemens HED42B040 is designed to meet UL 489 and IEC 60947-2 standards for molded case circuit breakers.

Where It Works Best

• Siemens low voltage panelboards using ED frame breakers
• 480V two-pole electrical distribution applications
• Commercial and industrial electrical systems
• Compatible Siemens HED series breaker replacement projects
• Electrical maintenance and repair applications