B370HH - 70Amp Circuit Breaker

B370HH - 70Amp Circuit Breaker

When electrical systems are pushed hard day after day, dependable circuit protection is not optional. The Siemens B370HH 70 Amp 3-Pole Circuit Breaker is designed to help you keep commercial and industrial power distribution systems operating safely and efficiently. Built for 240VAC applications, this molded case circuit breaker combines reliable thermal magnetic protection with a high 65kA interrupting rating, giving facilities an added layer of defense against overloads and short circuits. Whether you are upgrading aging equipment, replacing a failed breaker, or building out a new electrical distribution system, the B370HH delivers the performance professionals expect from Siemens. Its compact bolt-on design allows for a secure fit in compatible panelboards and distribution equipment, helping electricians and maintenance teams streamline installation and servicing.

Key Features and Benefits

• 70 amp molded case circuit breaker designed for commercial and industrial applications: Built for dependable protection in demanding electrical systems.
• 3-pole configuration for dependable three-phase power distribution: Suitable for commercial and industrial three-phase systems.
• High 65kA interrupting capacity helps protect against high fault-current events: Designed for applications requiring higher available fault-current protection.
• Thermal magnetic trip mechanism responds quickly to overloads and short circuits: Helps reduce the risk of electrical damage and downtime.
• Bolt-on mounting design provides a secure and stable installation: Helps ensure dependable connections in compatible equipment.
• Compact construction helps simplify panel integration and maintenance access: Designed to help conserve panel space.
• UL 489 listed for trusted safety and performance standards: Built to meet low-voltage electrical distribution requirements.
• Ideal for electrical distribution systems requiring reliable circuit protection: Suitable for a wide range of commercial and industrial applications.
• Manufactured by Siemens, a recognized leader in electrical power solutions: Trusted performance from a well-known electrical manufacturer.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: B370HH
  
• Manufacturer Part Number (MFN): B370HH
  
• Product Type: Molded Case Circuit Breaker
  
• Breaker Series: HBL
  
• Amperage Rating: 70 Amps
  
• Voltage Rating: 240VAC
  
• Number of Poles: 3
  
• Interrupt Rating: 65kAIC
  
• Trip Type: Thermal Magnetic
  
• Mounting Style: Bolt-On
  
• Application: Electrical Distribution
  
• Electrical Connection Type: Bolt-On
  
• Standard Compliance: UL 489
  
• Dimensions:
  • Depth: 3 in.
  • Height: 4 in.
  • Width: 3 in.
• Net Weight: 0.948 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Requirements: The Siemens B370HH circuit breaker is manufactured to meet UL 489 requirements for molded case circuit breakers used in low-voltage electrical distribution systems.
• Professional-Grade Construction: It is designed for professional-grade commercial and industrial use and is classified as an active Siemens product.
  

Where It Works Best

• Commercial office buildings
• Industrial manufacturing facilities
• HVAC and mechanical systems
• Electrical distribution panels and panelboards
• Motor control applications
• Three-phase electrical systems
• Control panels and automation equipment
• Electrical retrofit and maintenance projects