Square D | Q1390 | Circuit Breaker | 90A | 3-Pole | 240V | 10kA | Plug-In

Meet the Square D Q1390 circuit breaker—a precise, plug-in protection solution for 240V, 3-pole circuits. With a 90A rating and a 10kA short‑circuit interrupting capability, this breaker is built to handle demanding loads while enabling quick, reliable replacements in compatible panels.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, the Q1390 helps you restore safe operation without guessing on compatibility.

Key specifications

• Amperage: 90 A
• Poles: 3‑Pole
• Voltage: 240 V
• Interrupting rating: 10 kA
• Type: Plug‑In

Why this breaker stands out

• Plug‑in installation enables faster swaps in compatible Square D panels, reducing downtime during upgrades or repairs.
• Three‑pole design ensures all phases trip together for safer maintenance on 240V, three‑phase or multi‑branch circuits.
• The 10kA interrupting rating provides robust protection against high fault currents common in commercial and light industrial settings.
• Exact part number Q1390 makes compatibility clear—use this as your primary reference when sourcing replacements or retrofits.

Ideal applications and use cases

• Panel retrofits where a precise 90A, 3‑pole, 240V plug‑in breaker is required
• Maintenance or replacement of aging circuits in commercial or light industrial environments
• Motor control and heavy-load circuits that demand reliable overload protection with a strong interrupting rating

Compatibility note: Confirm fit and ratings before ordering. Part number is the best reference for compatibility.