THQB32090ST1 - 90Amp Circuit Breaker

THQB32090ST1 - 90 Amp Circuit Breaker

The THQB32090ST1 is a 90-amp, 3-pole THQB molded case circuit breaker designed to provide dependable overcurrent protection for your commercial, industrial, and institutional electrical distribution systems. Built as part of the trusted Q-Line family, this bolt-on circuit breaker helps safeguard equipment and branch circuits while delivering secure panelboard installation and consistent performance. Equipped with a 120VAC shunt trip, the THQB32090ST1 allows for remote tripping capability, making it a practical solution for emergency shutdown systems, safety interlocks, and other applications requiring remote circuit interruption. Its compact footprint, combined with reliable protection characteristics, makes it well-suited for modern power distribution environments where safety and operational control are essential.

Key Features and Benefits

• 90 Amp Current Rating: For medium-duty commercial and industrial electrical systems.
• 3-Pole Configuration: Provides protection for three-phase electrical circuits.
• 120VAC Shunt Trip: Enables remote tripping for enhanced safety and system control.
• Bolt-On Design: Helps ensure a secure and stable connection within compatible panelboards.
• 10kA Interrupting Capacity at 240VAC: Supports dependable fault current protection.
• Q-Line Series Construction: Is designed for compatibility with designated Q-Line electrical distribution equipment.
• HACR Rated: For use in heating, air conditioning, and refrigeration applications where applicable.
• Molded Case Construction: Helps provide long-term durability in demanding electrical environments.
  

Technical Specifications

• Part Number: THQB32090ST1
  
• Type: THQB
  
• Current Rating: 90 Amps
  
• Poles: 3
  
• Interrupting Rating: 10kA
  
• Voltage Rating: 240VAC
  
• Trip Accessory: 120VAC Shunt Trip
  
• Mounting Style: Bolt-On
  
• Product Series: Q-Line
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 3.5 in.
  • Width: 4.0 in.
  • Depth: 2.81 in.
• Construction: Molded Case Circuit Breaker
  

Material Compliance and Certifications

• Application Rating: The THQB32090ST1 is manufactured as a molded case circuit breaker intended for use in electrical distribution systems requiring reliable overcurrent protection and remote trip functionality.
• HACR Rating: The breaker carries an HACR rating, making it suitable for applicable heating, ventilation, air conditioning, and refrigeration installations. Always verify local code requirements, equipment compatibility, and installation specifications before use.
  

Where It Works Best

• Commercial buildings and office facilities
• Industrial manufacturing equipment
• Mechanical and HVAC control systems
• Emergency shutdown and safety interlock circuits
• Three-phase power distribution systems
• Educational, healthcare, and institutional facilities
• Electrical panelboards requiring bolt-on circuit breaker installation
• With its combination of 90A overcurrent protection, 3-pole configuration, Q-Line compatibility, and 120VAC shunt trip functionality, the THQB32090ST1 offers an effective solution for electrical systems that require both reliable circuit protection and remote disconnect capability.