B320HH - 20Amp Circuit Breaker

B320HH - 20Amp Circuit Breaker

The Siemens B320HH circuit breaker is designed for your three-phase electrical systems that require dependable protection in applications with higher available fault current. Rated at 20 amps for 240V systems, this 3-pole Type HBL breaker helps protect your circuits, wiring, and connected equipment from overloads and short circuits in commercial and industrial electrical systems.

Its 65kA interrupting capacity makes it a strong option for systems where additional fault protection is important. The thermal magnetic trip design responds to both overload conditions and sudden fault events, helping you reduce the risk of damage to electrical equipment during normal operation. 

The bolt-on construction provides a secure fit in compatible Siemens panelboards and distribution equipment, making installation and replacement work more straightforward. Its compact design also helps save space inside panelboards and control equipment where room may already be limited.

Key Features and Benefits

• 20 amp molded case circuit breaker: Designed for dependable overcurrent protection in commercial and industrial electrical systems.
• 3-pole configuration for 240V systems: Suitable for three-phase electrical distribution applications.
• Type HBL breaker design: Built for reliable performance in compatible Siemens electrical equipment.
• 65kA interrupting capacity: Suitable for systems where additional fault protection is important.
• Thermal magnetic trip protection: Responds to both overload conditions and sudden fault events.
• Bolt-on mounting style: Provides a secure fit in compatible Siemens panelboards and distribution equipment.
• Helps protect against overloads and short circuits: Designed to safeguard circuits, wiring, and connected equipment.
• Compact design for panelboard applications: Helps save space inside panelboards and control equipment where room may already be limited.
• Suitable for commercial and industrial electrical systems: Commonly used in three-phase electrical distribution applications requiring dependable protection.
• UL 489 listed: Built for low-voltage electrical distribution applications.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: B320HH
  
• Product Type: Molded Case Circuit Breaker
  
• Breaker Series: HBL
  
• Amperage Rating: 20 Amps
  
• Number of Poles: 3 Pole
  
• Voltage Rating: 240 VAC
  
• Interrupt Rating: 65kAIC
  
• Trip Type: Thermal Magnetic
  
• Connection Type: Bolt-On
  
• Application: Electrical Distribution
  
• Standard: UL 489
  
• Dimensions:
  • Depth: Approx. 4 in
  • Height: Approx. 2 in
  • Width: Approx. 3 in
• Net Weight: 1.058 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Standards: The Siemens B320HH circuit breaker is manufactured to meet UL 489 standards for molded case circuit breakers used in low-voltage electrical distribution systems.
  

Where It Works Best

• Commercial electrical panels
• Industrial distribution systems
• Three-phase electrical equipment
• OEM machinery panels
• Branch circuit protection
• Industrial control panels
• Electrical distribution equipment
• Service upgrades and retrofit projects
• Electrical systems with higher available fault current levels