Square D | A1L320 | Circuit Breaker | 20A | 3-Pole | 240V

Square D A1L320 20A 3-Pole 240V Circuit Breaker

Engineered for reliability in maintenance, retrofit, and replacement projects, the Square D A1L320 is a 20-amp, 3-pole circuit breaker designed to protect 240-volt circuits in today’s demanding panels. This part is purpose-built for scenarios where exact specifications matter, delivering consistent performance when it’s time to upgrade or refresh aging protection devices.

• Amperage: 20A
• Poles: 3-Pole
• Voltage: 240V
• Reference: Part number A1L320

Why a 3-Pole 240V Breaker Matters

In multi-wire or three-phase electrical environments, a 3-pole breaker disconnects all live conductors simultaneously. This coordinated shutoff enhances safety, reduces arc risk, and protects linked equipment on 240V circuits—an essential feature for motors, compressors, and other heavy loads commonly found in commercial or industrial setups.

Ideal Use Cases

• Replacement for damaged or worn-out breakers in compatible Square D panels. Maintenance, retrofit, and replacement projects benefit from a part that matches the original specifications, minimizing compatibility issues.

• Upgrading legacy panels to ensure proper protection for 240V circuits that require a three-pole configuration.

Important Compatibility Notes

Before ordering, verify fit and ratings for your specific panel. The A1L320 reference is the most reliable indicator of compatibility, helping you avoid mismatches in trip characteristics, breaker style, and panel bus connection.

Practical Installation Insights

Power down the panel and follow all manufacturer torque recommendations for terminal connections. Confirm your panel is rated for 240V circuits and that the three-pole configuration aligns with the intended load. If you’re replacing an existing breaker, double-check that the carrier style and bus interface match your panel model to ensure secure mounting and proper operation.

Distinctive Value

Unlike generic replacements, the Square D A1L320 is purpose-mitted for precise trip curves and enduring construction within Square D ecosystems. Its design supports reliable protection for critical loads on 240V services, delivering predictable performance across all three poles and helping maintain uptime in mission-critical applications.

Ready to secure your 240V circuitry with a trusted, compatible Square D solution? The A1L320 is the clear choice for accurate compatibility, dependable protection, and straightforward retrofit or replacement projects.