Q1-390 - 90 Amp Circuit Breaker

Q1-390 - 90 Amp Circuit Breaker

Bring reliable protection to your three-phase systems with the Q1-390 90 Amp circuit breaker—a dependable, service-grade breaker built for both residential and light commercial installations. Designed specifically for safety during maintenance operations, this breaker guards your electrical infrastructure from short circuits and overloads with precision. Whether you’re upgrading an existing panel or adding redundancy to a system, the Q1-390 blends efficiency, safety, and ease of installation.

Key Features and Benefits

• High Current Capacity (90 A): Designed to handle rigorous loads without compromise, making it suitable for heavier-duty three-phase circuits.
• Three-Pole Protection: Delivers balanced protection across all three phases, helping maintain system stability under fault conditions.
• Thermal-Magnetic Trip Technology: Combines thermal elements and magnetic response to guard against both continuous overcurrent and sudden short circuits.
• Space-Saving Design: Requires only 6 panel spaces, ideal when space is limited in existing enclosures.
• Plug-On Mounting: Makes installation or replacement fast and clean—no need for extra brackets or complex wiring.

Why you’ll like this: fewer surprises, safer operation, and less downtime during service tasks.

Technical Specifications

• Frame Type: Q1
  
• Poles: 3
  
• Amperage Rating: 90 A
  
• Interrupting Capacity: 10 kA @ 240 VAC
  
• Dimensions:
  • Width: 2.25″
  • Length: 6.38″
  • Depth: 2.31″
• Shipping Weight: 3.10 lb
  

Material Compliance and Certifications

• This breaker meets stringent industry standards and is certified for safety and performance in maintenance environments.
• All materials and internal components comply with regulatory guidelines to ensure durability, consistency, and peace of mind in demanding settings.

Where It Works Best

• The Q1-390 excels in three-phase system maintenance across residential buildings, light commercial facilities, small industrial sites, and utility retrofit jobs. It’s particularly effective when replacing legacy breakers in older panel systems, where space is limited but full protection is nonnegotiable. If you're servicing motor circuits, HVAC systems, or infrastructure panels in moderate load venues, this breaker offers exactly the balance of capacity, protection, and install convenience you need.