Square D | Q1L320 | Circuit Breaker | 3-Pole | 240V

The Square D Q1L320 circuit breaker is a reliable 3-pole protective device engineered for 240V systems. Designed to meet maintenance, retrofit, and replacement needs where exact specifications matter, this breaker slips into compatible Square D panels to restore safe, continuous power distribution with confidence.

Key Specifications

• Poles: 3-Pole
• Voltage: 240V
• Part Number: Q1L320
• Compatibility: Best reference for match is the Q1L320 part number; confirm fit and ratings with your panel’s labeling and service manual before ordering.

Why this matters

When you’re maintaining or upgrading electrical infrastructure, using the exact Square D Q1L320 ensures proper fit, operative performance, and predictable trip characteristics for 240V circuits. This 3-pole configuration provides solid protection across multi-wire or multi-phase layouts that require a single, coordinated disconnect device, helping minimize downtime and maximize safety in your electrical system.

Use cases and ideal applications

• Maintenance: Replace worn or outdated breakers in compatible Square D panels to restore reliable protection.
• Retrofit: Update older systems to contemporary protection standards while maintaining panel compatibility.
• Replacement: Maintain continuity of service in circuits that require a 3-pole, 240V protective device with a specific part reference.

Practical guidance

Before purchasing, verify that your enclosure accepts the Q1L320 and that the panel’s ratings align with a 240V, 3-pole configuration. The part number is the most reliable reference for compatibility, reducing the risk of mismatch and installation delays. Follow standard electrical safety practices during replacement or retrofit, ensuring the main power is secured and the circuit is de-energized before handling any components.