BQ3B040H - 40Amp Circuit Breaker

BQ3B040H - 40Amp Circuit Breaker

Keep your three-phase electrical systems safe and reliable with the Siemens BQ3B040H, a 40-amp, 3-pole circuit breaker designed for branch circuit protection in commercial and industrial applications. This common-trip breaker disconnects all three poles at once in case of an overload or short circuit, helping maintain safe operation and protect equipment. Rated for 240V and 22 kA interrupting capacity, the BQ3B040H fits directly into compatible Siemens panelboards and includes load-side lugs for easier wiring. Ideal for motor circuits, HVAC systems, control panels, and other critical three-phase equipment, this breaker offers dependable protection in legacy and existing electrical systems.

Key Features and Benefits

• 40 amp, 3-pole molded case circuit breaker
• Common-trip design disconnects all poles simultaneously
• Rated for 240VAC electrical systems
• 22 kA interrupting capacity (22kAIC)
• Bolt-on installation for secure connection
• Load-side lugs included for easier wiring
• Suitable for commercial and industrial branch circuits
• Designed to fit Siemens Type BQ panelboards
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BQ3B040H
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC
  
• Amperage Rating: 40 Amps
  
• Interrupting Rating: 22 kAIC
  
• Trip Type: Common Trip
  
• Mounting Type: Bolt-On
  
• Electrical Connection: Bolt-On
  
• Dimensions: 3 in. W × 4 in. H × 3 in. D
  
• Net Weight: 1.213 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Listed
• Built to Siemens standards for low-voltage electrical distribution
• Active product lifecycle
  

Where It Works Best

• This breaker is perfect for commercial buildings, manufacturing facilities, warehouses, schools, and other environments where three-phase protection is essential.