B3100 - 100Amp Circuit Breaker

B3100 - 100Amp Circuit Breaker

The Siemens B3100 circuit breaker is a practical choice for protecting your three-phase electrical systems in commercial and industrial applications. Built for 240V systems and rated at 100 amps, this 3-pole molded case breaker helps protect your wiring and connected equipment from overloads and short circuits while supporting reliable day-to-day power distribution. Designed as part of the Siemens Type BL series, the B3100 uses a thermal magnetic trip system that responds to both long-term overload conditions and sudden fault events. Whether it’s protecting feeder circuits, branch circuits, or distribution equipment, the B3100 delivers the kind of everyday reliability professionals expect from Siemens electrical products.

Key Features and Benefits

• 100 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: Responds to both long-term overload conditions and sudden fault events.
• 10kA interrupting capacity: Provides dependable fault protection in standard electrical distribution systems.
• Bolt-on mounting style: Supports secure installation in compatible Siemens panelboards and load centers.
• Helps protect against overloads and short circuits: Designed to safeguard wiring and connected electrical equipment.
• Compact design for panelboard applications: Helps support installation in standard electrical distribution equipment.
• Suitable for commercial and industrial electrical systems: Commonly used in feeder circuits, branch circuits, and distribution equipment.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: B3100
  
• Product Type: Molded Case Circuit Breaker
  
• Breaker Series: BL
  
• Amperage Rating: 100 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: 0.86 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489 Standards: The Siemens B3100 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
• Feeder circuit applications
• Control panels and motor control systems
• Service upgrades and retrofit projects