Q1-290 - 90 Amp Circuit Breaker

Q1-290 - 90 Amp Circuit Breaker

When you need dependable protection for demanding circuits, the Q1-290 steps in with confidence. This 2-pole, 90-amp plug-on breaker is engineered to handle maintenance-level circuits in both homes and light commercial installations. Thanks to its solid design and dual thermal + magnetic trip mechanism, it delivers steady performance without surprises. Given its 10,000 AIC interrupting capacity at 120/240 VAC and plug-in format, it’s built to safeguard your circuits without overcomplicating installation.

Key Features & Benefits

• Thermal-Magnetic Trip Technology: Combines slow (thermal) and instantaneous (magnetic) response to protect against sustained overloads and abrupt short circuits — giving you balanced safety.
• High Interrupting Capacity: Rated at 10,000 AIC, it can break fault currents effectively, helping prevent damage to wiring and downstream components.
• Plug-On Installation: Snaps directly into compatible panel bus stabs, reducing installation time and effort — ideal when you’re swapping in a replacement during maintenance.
• 4-Space Panel Fit: Requires four contiguous terminal spaces in the panel, ensuring a secure, stable fit under load.
• Sturdy Material Build: Manufactured with materials suited for frequent use and the occasional harsh environment, so you get a more extended service life.

Technical Specifications

• Number of Poles: 2
  
• Amperage (Continuous): 90 A
  
• Interrupting Capacity (AIC): 10,000 A @ 120/240 VAC
  
• Frame Type: Q1
  
• Panel Space Requirement: 4 spaces
  
• Dimensions:
  • Width: 1.50″
  • Length: 6.38″
  • Depth: 2.31″
• Weight: 3.50 lbs
  

Material Compliance & Certifications

• UL Standards: The Q1-290 meets or exceeds UL 489 standards for molded-case circuit breakers, assuring you of compliance with national safety guidelines.
• Industry Compliance: All internal components are selected and tested to conform to industry regulations for circuit protection devices. Its construction materials are compatible with NEC and NEMA design expectations, giving electricians confidence during inspections.

Where It Works Best

• This breaker is a wise choice when servicing or upgrading existing electrical systems that require a 90 A protective device. Whether you’re replacing worn equipment in homes, light commercial panels, or utility rooms, the Q1-290 aligns well with standard panel designs. Its high interrupting rating ensures safety even in heavier-load environments, and the plug-on format makes installation clean and efficient without extra adapters or wiring changes. Use it when reliability and straightforward maintenance are your priorities.