Square D QBA221101 - 110 A, 2-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D QBA221101—a 110-amp, 2-pole plug-in molded case circuit breaker built to safeguard your electrical system with precision. Designed for dependable branch circuit overcurrent and short-circuit protection, it fits seamlessly into panelboards and loadcenters that require a fast, reliable plug-in solution.

Why this model stands out

• Fast plug-in connection: Snap-in installation means less downtime during upgrades or replacements and simpler maintenance in busy electrical rooms.
• Thermal-magnetic trip unit: A dual-action protection approach. The thermal element handles sustained overloads with predictable response, while the magnetic element delivers immediate interruption for severe faults—delivering stable, repeatable protection you can trust.
• OEM panel compatibility: Engineered to be compatible with matching OEM load centers and panelboards, helping maintain correct trip characteristics and a clean, professional installation.
• Versatile applications: Suitable for residential, commercial, and light industrial environments—whether you’re protecting lighting circuits, outlets, or small motors, this breaker has you covered.

Technical specifications

• Manufacturer: Square D
• Part Number: QBA221101
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110 A
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or expanding residential panels where a reliable 110 A, 2-pole plug-in breaker is required
• Replacing aging or tripping breakers in commercial load centers to restore stable protection for circuits feeding lighting, receptacles, and small equipment
• Installing in light industrial panels that demand quick maintenance and consistent trip performance

With the Square D QBA221101, you’re choosing a proven balance of speed, precision, and compatibility. It’s more than a breaker—it’s a reliable safeguard for your electrical infrastructure, designed to keep downtime to a minimum and performance to a maximum. Trust AmpState to deliver a product that aligns with your panelboard and loadcenter specs while providing straightforward, long-term protection for your most important circuits.