BQD370 - 70Amp Circuit Breaker

BQD370 - 70Amp Circuit Breaker

The Siemens BQD370 is a 3-pole, 70 Amp circuit breaker designed for use in 480/277VAC panelboard systems. It's commonly used in commercial buildings, industrial facilities, and construction applications where three-phase power distribution requires dependable overcurrent protection. Typical applications include lighting panels, HVAC equipment, motors, pumps, and other branch circuits.

The panelboard-mount design and low-tab connections allow for straightforward installation in compatible Siemens panelboards. Its molded case construction is designed for everyday commercial and industrial use, and the compact size helps make efficient use of available panel space.

Whether you're installing it as part of a new project, used during a panel upgrade, or replacing an existing breaker, the Siemens BQD370 provides the ratings and protection characteristics required for many 480/277VAC power distribution systems.

Key Features and Benefits

• 70 Amp current rating
• 3-pole configuration for three-phase power systems
• Rated for 480/277VAC applications
• Thermal magnetic trip unit for overload and short-circuit protection
• 14 kAIC interrupting capacity
• Panelboard-mount construction
• Low-tab electrical connections
• Compact molded case design
• Designed for 50/60 Hz operation
• Suitable for commercial, industrial, and construction applications
• Helps protect lighting circuits, motors, HVAC equipment, pumps, and branch circuits

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BQD370
  
• Series: BQD
  
• Current Rating: 70 Amps
  
• Number of Poles: 3
  
• Voltage Rating: 480/277VAC
  
• Interrupting Capacity: 14 kAIC
  
• Frequency Rating: 50/60 Hz
  
• Trip Type: Thermal Magnetic
  
• Frame Size: 100A
  
• Mounting Style: Panelboard Mount
  
• Connection Type: Low Tab
  
• Circuit Breaker Type: Molded Case Circuit Breaker
  
• Dimensions:
  • 5 in. D × 3 in. W × 3 in. H
• Maximum Ambient Operating Temperature: 40°C
  
• Net Weight: 0.58 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

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

Where It Works Best

• The Siemens BQD370 is commonly found in commercial and industrial panelboards serving lighting systems, HVAC equipment, motor loads, pumps, compressors, and general power distribution circuits.