Square D QO390 Circuit Breaker – 90A – 3-Pole – 120/240V – 10kA – Plug-In – QO Series

The Square D QO390 is a 90A, 3-pole plug-in circuit breaker designed for reliable electrical protection in compatible QO load centers, CSEDs, and NQOD panelboards. It is rated for 120/240V three-phase applications and provides fast-response circuit protection with a 10,000A interrupting rating.

The QO390 features a compact plug-in connection and is part of the Square D QO Series, making it suitable for compatible residential and commercial electrical distribution applications.

Specifications

• Manufacturer: Schneider Electric
• Brand: Square D
• Product Type: Circuit Breaker
• Series: QO
• Catalog Number: QO390
• Current Rating: 90A
• Number of Poles: 3-Pole
• Phase: 3-Phase
• Voltage Rating: 120/240V
• Interrupting Rating: 10,000A
• Connection: Plug-In
• Dimensions (H × W × L): 3.5 × 1.50 × 3 in
• Application: Electrical circuit protection

Part Numbers & Identification

• Manufacturer Part Number (MPN): QO390
• Catalog Number: QO390
• Alternate Model: Q0390
• Product Family: QO Series
• Brand: Square D
• Manufacturer: Schneider Electric
• Product Type: 90A Circuit Breaker
• upc:785901004400

Compatibility

Designed for use with compatible Square D QO load centers, CSEDs, and NQOD panelboards. Always verify the specific load center or panelboard model and approved breaker combinations before installation.

Certifications

• UL Listed
• CSA Approved
• Authentic Square D Product

Returns are easy

You may return items within 10 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.