QR22B125 - 125Amp Circuit Breaker

QR22B125 - 125Amp Circuit Breaker

The Siemens QR22B125 is a robust 2-pole, 125-amp molded case circuit breaker engineered for dependable protection in commercial and industrial electrical systems. Operating at 240V AC with a 10kA interrupting capacity, this thermal-magnetic breaker ensures reliable performance under demanding conditions. Its QR frame design, calibrated for 40°C ambient temperatures, offers versatility across various applications, including load centers, panelboards, switchboards, and control panels. The bolt-on mounting style and load-side lug terminals facilitate straightforward installation, while the absence of factory-installed line-side lugs allows for customized configurations.

Key Features and Benefits

• Thermal-Magnetic Trip Unit: Combines long-time and instantaneous protection to safeguard circuits against overloads and short circuits.
• High Interrupting Capacity: Rated at 10kA at 240V AC, ensuring effective interruption of fault currents.
• Flexible Installation: Bolt-on design with load-side lugs included; line-side lugs can be added as needed for customized setups.
• Compact QR Frame: Designed for space efficiency without compromising performance, suitable for various panel configurations.
• Field-Installable Accessories: Supports optional shunt trips and auxiliary switches for enhanced control and monitoring capabilities.

Technical Specifications

• Voltage Rating: 240V AC
  
• Current Rating: 125 Amps
  
• Interrupting Rating: 10kA at 240V AC
  
• Number of Poles: 2
  
• Trip Type: Thermal-Magnetic
  
• Mounting Style: Bolt-On
  
• Terminal Type: Load-Side Lugs Included; Line-Side Lugs Not Installed
  
• Frame Type: QR
  
• Ambient Temperature Calibration: 40°C
  
• Dimensions (H x W x D): 7.087 in x 4.331 in x 3.937 in
  
• Weight: Approximately 3.2 lbs
  

Material Compliance and Certifications

• Certifications: UL 489, CSA C22.2, NOM-003
• RoHS Compliance: Information not available
• REACH Compliance: No Substances of Very High Concern (SVHC) reported

Suitability

• The Siemens QR22B125 circuit breaker is ideally suited for applications requiring reliable overcurrent protection in commercial and industrial settings. Its compatibility with various panel types and support for field-installable accessories make it a versatile choice for system designers and electricians. Whether used in load centers, panelboards, switchboards, or control panels, the QR22B125 delivers consistent performance and adaptability to meet diverse electrical distribution needs.