B320 - 20Amp Circuit Breaker

B320 - 20Amp Circuit Breaker

The Siemens B320 circuit breaker is a dependable choice for protecting your three-phase electrical systems in commercial and industrial settings. Rated at 20 amps for 240V applications, this 3-pole Type BL breaker helps protect your wiring, panels, and connected equipment from overloads and short circuits while keeping power distribution systems running safely. Its thermal magnetic trip design reacts to both overload conditions and sudden faults, helping reduce the risk of damage to electrical equipment during everyday operation. The bolt-on construction provides a secure fit in compatible Siemens panelboards and distribution equipment, making installation and replacement work more straightforward for contractors and maintenance teams. Whether it’s part of a new installation, equipment replacement, or facility upgrade, the Siemens B320 delivers dependable circuit protection without adding unnecessary complexity.

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 BL breaker design: Built for reliable performance in compatible Siemens electrical equipment.
• Thermal magnetic trip protection: Reacts to both overload conditions and sudden faults.
• 10kA interrupting capacity: Provides dependable fault protection in standard electrical distribution systems.
• 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 wiring, panels, and connected electrical equipment.
• Compact design for panelboard applications: Helps support installation in panelboards and control equipment where available space may be limited.
• Suitable for commercial and industrial electrical systems: Commonly used in three-phase electrical distribution applications.
• UL 489 listed: Built for low-voltage electrical distribution applications.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: B320
  
• Product Type: Molded Case Circuit Breaker
  
• Breaker Series: BL
  
• Amperage Rating: 20 Amps
  
• Number of Poles: 3 Pole
  
• Voltage Rating: 240 VAC
  
• Interrupt Rating: 10kAIC
  
• Trip Type: Thermal Magnetic
  
• Connection Type: Bolt-On
  
• Application: Electrical Distribution
  
• Standard: UL 489
  
• Dimensions:
  • Depth: Approx. 4 in
  • Height: Approx. 3 in
  • Width: Approx. 3 in
• Net Weight: 0.948 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Standards: The Siemens B320 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
• Control panels and motor control systems
• Electrical distribution equipment
• Service upgrades and replacement projects
• General power distribution applications