B320H - 20Amp Circuit Breaker

B320H - 20Amp Circuit Breaker

The Siemens B320H circuit breaker is a practical choice for protecting your three-phase electrical systems where a standard breaker may not provide enough interrupting capacity. Rated at 20 amps for 240V applications, this 3-pole Type BLH breaker is built to help protect your circuits, wiring, and connected equipment from overloads and short circuits in commercial and industrial environments.

What makes the B320H stand out is its 22kA interrupting rating, making it well-suited for systems with higher available fault current. The thermal magnetic trip design reacts to both long-term overloads and sudden fault conditions, helping reduce the risk of damage to electrical equipment during normal operation. Its bolt-on construction provides a secure fit in compatible Siemens panelboards and distribution equipment, which can make replacement and installation work easier for contractors and maintenance teams. The compact size is also helpful in panelboards and control equipment where space is already tight.

The Siemens B320H is commonly found in control panels, branch circuits, industrial machinery, and facility power distribution systems where dependable three-phase protection matters day after day.

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 BLH breaker design: Built for reliable performance in compatible Siemens electrical equipment.
• 22kA interrupting capacity: Well-suited for systems with higher available fault current.
• Thermal magnetic trip protection: Reacts to both long-term overloads and sudden fault conditions.
• 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: Helpful in panelboards and control equipment where space is already tight.
• Suitable for commercial and industrial electrical systems: Commonly used in control panels, branch circuits, industrial machinery, and facility power distribution systems.
• UL 489 listed: Built for low-voltage electrical distribution applications.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: B320H
  
• Product Type: Molded Case Circuit Breaker
  
• Breaker Series: BLH
  
• Amperage Rating: 20 Amps
  
• Number of Poles: 3 Pole
  
• Voltage Rating: 240 VAC
  
• Interrupt Rating: 22kAIC
  
• 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: 1.058 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Standards: The Siemens B320H 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