Square D | A1L120 | Circuit Breaker | 20A | 1-Pole | 120V

Introducing the Square D A1L120 Circuit Breaker — a dependable 20-amp, single-pole solution engineered for 120-volt circuits. This unit is purpose-built for maintenance, retrofit, and replacement projects where exact compatibility is non-negotiable, delivering consistent protection without compromising panel performance.

Key specifications

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 120V
• Best reference for compatibility: Part number A1L120
• Applications: maintenance, retrofit, and replacement where matching specs are required
• Important note: Confirm fit and ratings before ordering

Why this Square D A1L120 stands out

As a genuine Square D component, the A1L120 is designed to integrate seamlessly with compatible panels, maintaining the original trip characteristics and mounting standards. Its 20-amp, single-pole configuration provides reliable protection for individual circuits in both residential and light commercial settings, helping prevent overcurrent events that could damage wiring and devices.

Ideal uses and scenarios

• Replacing a failed or worn-out 20A single-pole breaker in an existing 120V panel
• Retrofit projects where a precise A1L120 specification is required to maintain panel integrity
• Maintenance tasks that call for a compatible, factory-referenced part number to ensure ongoing safety and performance

Practical benefits and outcomes

Choosing the A1L120 means you’re selecting a device that adheres to Square D’s design and safety standards, offering predictable trip behavior and reliable protection for essential circuits. The single-pole design is ideal for branch circuits that don’t require multi-pole interlock, helping you keep electrical systems organized and safe while maintaining steady, module-compatible performance.

Installation and compatibility tips

• Use the part number A1L120 as the primary reference to verify compatibility with your panel model
• Always confirm the breaker’s fit and ratings before purchasing or installing
• If you’re unsure about compatibility, consult your panel’s documentation or a qualified electrician to avoid mismatches
• Follow standard electrical safety practices: disconnect power at the main, use appropriate protective gear, and handle breakers with care