Q221125AB - 125 Amp Circuit Breaker

Q221125AB - 125 Amp Circuit Breaker

Meet the Q221125AB molded case circuit breaker, built to deliver dependable overload and short-circuit protection in residential, commercial, or light-industrial settings. Whether you’re safeguarding a service panel, motor control setup, or HVAC circuit, this breaker offers a high value mix of protection, ease-of-use, and space-saving design. With thermal-magnetic tripping and plug-on compatibility, it helps you maintain safety and uptime — without adding bulk or complexity.

Key Features & Benefits

• Thermal-magnetic trip mechanism: Responds precisely to both gradual overloads and abrupt short circuits, giving your system reliable protection.
• Plug-on, I-Line panel compatibility: Speeds up installation and replacement by snapping easily into standard I-Line distribution panels.
• Compact Q-frame design: Conserves panel space, letting you maximize capacity without sacrificing performance.
• Dual-pole, 125 A rating: Supports 120/240 VAC service with strong current-handling capability.
• 10 kA interrupting capacity: Ensures the breaker can safely clear faults up to 10,000 amps.
• Phasing: A-Bʹ: Designed to optimize power distribution under normal load conditions.

Each of those features isn’t just technical jargon — they translate into lower installation time, long-term safety, and dependable performance under real-world conditions.

Technical Specifications

• Poles: 2
• Amperage: 125 A
• Voltage: 120/240 VAC
• Interrupting Capacity (AIC): 10 kA
• Frame Type: Q2 (Q-frame)
• Dimensions:
  • Width: 3.00 inches
  • Length: 7.88 inches
  • Depth: 4.31 inches
• Weight: 6.50 lbs
• Phasing: A-Bʹ

These specs give electricians and system designers the confidence they need to size circuit protection correctly for various load scenarios.

Material Compliance & Certifications

• Industry Standards: Conforms to recognized industry safety and performance standards.
• Environmental Compliance: Constructed using materials that comply with environmental regulations.
• UL Listing: Fully UL-listed — tested under rigorous conditions to validate quality and consistency.

These certifications and compliant materials ensure you’re getting a product you can trust long term, especially when it’s guarding critical infrastructure.

Where It Works Best

• Residential service or sub-panels, especially where a high-capacity breaker is needed.
• Commercial lighting, HVAC, or general-purpose circuits that need 120/240 V protection.
• Light industrial or small-factory setups where motors or compressors require reliable tripping.
• Replacement or upgrade projects in panelboards already using I-Line architecture.