BQ3B045 - 45Amp Circuit Breaker

BQ3B045 - 45Amp Circuit Breaker

Keep your three-phase electrical systems protected with the Siemens BQ3B045. This 45-amp, 3-pole molded case circuit breaker is part of Siemens’ trusted Type BQ family and provides straightforward, reliable branch circuit protection. With a common-trip design, all three poles disconnect simultaneously during an overload or short circuit, keeping your equipment safe and your system running smoothly. Rated for 240V and a 10 kA interrupting capacity (10kAIC), it slots easily into compatible Siemens panelboards, and the included load-side lugs make installation a snap.

Key Features and Benefits

• 45 amp, 3-pole molded case circuit breaker
• Common-trip design disconnects all poles together
• Rated for 240VAC electrical systems
• 10 kA interrupting capacity (10kAIC)
• Bolt-on installation ensures a secure panel connection
• Load-side lugs included for easy wiring
• Designed for branch circuit protection in commercial and industrial setups
• Compatible with Siemens Type BQ panelboards
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BQ3B045
  
• Number of Poles: 3
  
• Voltage Rating: 240 VAC
  
• Amperage Rating: 45 Amps
  
• Interrupting Rating: 10 kAIC
  
• Trip Type: Common Trip
  
• Mounting Type: Bolt-On
  
• Electrical Connection Type: Bolt-On
  
• Depth: 3 in | Width: 3 in | Height: 4 in
  
• Net Weight: 1.014 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

• The BQ3B045 is perfect for commercial buildings, factories, schools, warehouses, and any environment that needs dependable three-phase branch circuit protection.