BQD350 - 50Amp Circuit Breaker

BQD350 - 50Amp Circuit Breaker

The Siemens BQD350 is a 50-amp, 3-pole circuit breaker designed for use in 480/277VAC three-phase electrical systems. It's commonly installed in commercial and industrial panelboards where reliable circuit protection is needed for your lighting, HVAC equipment, pumps, motors, and other electrical loads. If a circuit experiences an overload or fault, the breaker trips and disconnects power to help protect both equipment and wiring.

This model uses a thermal magnetic trip mechanism, which is one of the most common breaker technologies found in commercial electrical systems.

The panelboard-mount construction and low-tab connections make the BQD350 a practical choice for service work, panel upgrades, and replacement projects. Whether you're maintaining an existing facility or replacing a failed breaker, having the correct amperage, voltage rating, and breaker type matters. The BQD350 is built for those applications where dependable circuit protection is expected and downtime isn't an option.

Key Features and Benefits

• 50 Amp current rating
• 3-pole configuration
• Rated for 480/277VAC systems
• Thermal magnetic trip unit
• 14 kAIC interrupting capacity
• Panelboard-mount design
• Low-tab electrical connections
• Molded case circuit breaker construction
• Designed for commercial and industrial power distribution

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BQD350
  
• Series: BQD
  
• Current Rating: 50 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 480/277VAC
  
• Interrupting Capacity: 14 kAIC
  
• Frequency: 50/60 Hz
  
• Trip Type: Thermal Magnetic
  
• Mounting Style: Panelboard Mount
  
• Connection Type: Low Tab
  
• Frame Size: 100A
  
• Breaker Type: Molded Case Circuit Breaker
  
• Dimensions:
  • 3 in. W × 3 in. H × 4 in. D
• Maximum Ambient Operating Temperature: 40°C
  
• Net Weight: 1.349 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Listed
• CSA C22.2 Certified
• RoHS Compliant
• WEEE Take-Back Obligations Applicable
• REACH Information Available

Where It Works Best

• The Siemens BQD350 is commonly used in commercial buildings, schools, healthcare facilities, warehouses, manufacturing plants, and retail properties operating on 480/277VAC electrical systems.