Q1B120 - 20 Amp Circuit Breaker

Q1B120 - 20 Amp Circuit Breaker

When safeguarding an electrical circuit, you can’t compromise — the Q1B120 20A Circuit Breaker delivers dependable protection and peace of mind. Designed for both residential repair jobs and light commercial installations, this single-pole breaker handles overloads and short circuits with precision. Its thermal-magnetic mechanism reacts quickly to irregular current spikes, while maintaining stable performance even under typical loads. The bolt-on mounting design ensures a solid, vibration-resistant installation, and its compact profile conserves panel space. Whether you're updating a system, replacing an old unit, or building a maintenance stock, the Q1B120 is your go-to for efficient, dependable circuit protection.

Key Features and Benefits

• Solid 20A Protection: Built to handle everyday circuits, this breaker gives you dependable overload and fault protection.
• Single-Pole Design: Ideal for circuits that require a single-phase switch, especially in lighting, outlets, or small loads.
• Thermal-Magnetic Trip Mechanism: Combines thermal response (for continuous overloads) and magnetic trip (for sudden surges) to respond appropriately to faults.
• Space-Saving Profile: Requires only two panel spaces, letting you maximize capacity without wasting room.
• Bolt-On Installation: Fast, secure mounting. No loose clips or extra hardware needed.
• Reliable Operation Over Time: Engineered to hold up under repeated cycles and maintain consistent performance.

Technical Specifications

• Amperage: 20 A
• Number of Poles: 1 (Single Pole)
• Interrupt Rating (A.I.C.): 10,000 A @ 120 VAC
• Frame Type: Q1B
• Mounting Style: Bolt-On
• Dimensions:
  • Width: 0.75 in
  • Length: 6.38 in
  • Depth: 2.31 in
• Panel Spaces Required: 2
• Approximate Ship Weight: 3.50 lbs

Material Compliance and Certifications

• Industry Standards: Manufactured to meet or exceed industry standards for safety and electrical performance.
• Durable Construction: Built from durable, high-grade materials that resist thermal stress and corrosion.
• Performance Testing: Tested for consistent trip performance and longevity.
• Certifications: Conforms to recognized standards and certifications for molded‐case circuit breakers.

Where It Works Best

• The Q1B120 circuit breaker shines in maintenance, repair, and retrofit applications—especially when replacing old or worn units in homes, offices, small commercial panels, and light industrial setups. Its compact footprint and secure bolt-on mounting make it ideal in panels where space is limited. Use it to protect lighting circuits, receptacles, control circuits, or individual branch loads. Because of its robust protection and reliable operation, it’s a strong option when you want to extend the life of an existing system or build a spare-parts inventory you can trust.