BQ1B040 - 40Amp Circuit Breaker

BQ1B040 - 40Amp Circuit Breaker

The Siemens BQ1B040 40 Amp 1-Pole Circuit Breaker is designed to provide dependable overcurrent protection for electrical systems that require consistent operation day after day. As part of the Siemens BQ Series, this 40 amp bolt-on circuit breaker helps protect branch circuits from overloads and short circuits while supporting the safe operation of connected equipment. Designed for use in compatible Siemens electrical distribution systems, it offers the form, fit, and function required for maintenance, replacement, and repair applications.

Whether you're replacing an existing breaker in a Siemens panelboard, performing routine maintenance, or working on a facility upgrade, the BQ1B040 is a practical solution for a variety of commercial, industrial, and institutional environments. Its 120-volt rating, single-pole configuration, and 10kAIC interrupting capacity make it suitable for protecting individual branch circuits where these specifications are required. The included load-side lugs help simplify installation, while the bolt-on mounting design provides a secure connection within compatible Siemens equipment.

Key Features and Benefits

• 40 Amp Current Rating: Designed to protect branch circuits requiring 40 amps of overcurrent protection.
• Single-Pole Design: Intended for individual 120-volt circuit applications.
• 120 Volt Rating: Suitable for use in compatible low-voltage electrical systems.
• 10kAIC Interrupting Capacity: Rated to safely interrupt fault currents up to 10,000 amps.
• Bolt-On Mounting Configuration: Provides a secure mechanical and electrical connection in compatible Siemens equipment.
• Load-Side Lugs Included: Helps simplify installation and replacement projects.
• BQ Series Compatibility: Designed for Siemens panelboards and electrical distribution systems requiring BQ-style breakers.
• Molded Case Construction: Designed to provide overcurrent and short-circuit protection.
• Compact Design: Fits efficiently within compatible electrical distribution equipment.
• Built to Last: Designed for continued service when properly installed and maintained.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BQ1B040
  
• Manufacturer Part Number (MFN): BQ1B040
  
• Product Series: BQ
  
• Product Family: Branch Circuit Breakers
  
• Product Type: Molded Case Circuit Breaker
  
• Number of Poles: 1
  
• Current Rating: 40 Amps
  
• Voltage Rating: 120 VAC
  
• Interrupting Capacity: 10kAIC
  
• Mounting Type: Bolt-On
  
• Connection Type: Load-Side Lugs Included
  
• Application: Branch Circuit Protection
  
• Packaging Dimensions:
  • Length: 2.571 in.
  • Width: 1.00 in.
  • Height: 3.736 in.
• Net Weight: 0.309 lb
  
• Country of Origin: Mexico
  
• Product Lifecycle Status: Active Product
  

Material Compliance and Certifications

• UL 489 Listed: For molded case circuit breaker applications.
• Designed for Branch Circuit Protection: In accordance with applicable industry standards.
• Export Classification: EAR99
• Commodity Code: 8536200020
• Transportation Classification: Non-hazardous for transportation and handling.
• Manufactured by Siemens: For use in compatible Siemens electrical distribution equipment.
  

Where It Works Best

• The Siemens BQ1B040 is commonly found in commercial buildings, schools, healthcare facilities, warehouses, retail spaces, manufacturing environments, and other properties that utilize Siemens electrical distribution equipment. Typical applications include lighting circuits, receptacle circuits, dedicated equipment loads, control panels, and other branch circuit installations requiring 40 amp overcurrent protection.