Square D | QJA321006 | Circuit Breaker | 100A | 3-Pole | 240V | Plug-In

Meet the Square D QJA321006 circuit breaker — a reliable, plug-in solution designed for 3-pole, 240V systems. With a 100A rating, this unit provides solid protection for three-phase circuits in compatible Square D panels. Built for maintenance, retrofit, and replacement projects, it delivers a straightforward, efficient path to keeping critical equipment energized and safeguarded. When you need a matching specification fast, the part number QJA321006 is the best reference for compatibility.

Key specifications

• Amperage: 100A
• Poles: 3-Pole
• Voltage: 240V
• Type: Plug-In
• Part number: QJA321006

Why this plug-in breaker is the right choice

• Plug-in convenience: Quick installation in compatible panels minimizes downtime and reduces field labor compared to more invasive mounting methods.
• Precise compatibility: Designed to match Square D’s QJA-series specifications. Always verify fit and ratings before ordering — the part number is the most reliable reference for compatibility.
• Robust 100A protection: Suitable for safeguarding 3-phase loads and feeder circuits, helping to prevent overloads in commercial and industrial applications.
• Versatile use cases: Ideal for maintenance substitutions, panel retrofits, or replacing a failed breaker in existing Square D installations that require a 3-pole, 240V unit.

Use cases and practical scenarios

Engineered for real-world electrical setups, this breaker is a practical choice when you’re updating or repairing a panel that requires a 3-pole, 240V plug-in unit. It’s well-suited for protecting three-phase equipment in commercial spaces, light industrial environments, and service panels where quick, reliable replacement is critical. Use it to restore protection for motors, transformers, or other 3-phase loads that demand solid, dependable circuit protection at 100A.

Installation and compatibility tips

Before you order, confirm that your panel accepts plug-in QJA-series breakers and cross-check the ratings against your system requirements. The QJA321006 part number is your best reference for compatibility, ensuring you get a precise fit and correct electrical characteristics for your setup.

When you’re ready to secure dependable protection for 3-pole, 240V circuits, the Square D QJA321006 plug-in circuit breaker delivers straightforward installation, clear identification, and solid performance for maintenance, retrofit, and replacement projects.