THQB32050ST1 - 50Amp Circuit Breaker

THQB32050ST1 - 50 Amp Circuit Breaker

The THQB32050ST1 is a 50-amp, 3-pole molded case circuit breaker designed for dependable overcurrent protection in your commercial, industrial, and institutional electrical distribution systems. Built as part of the trusted Q-Line family, this THQB bolt-on circuit breaker combines secure panelboard mounting with the added functionality of a factory-installed 120VAC shunt trip, allowing for remote tripping and emergency power disconnection when required. With a 10kA interrupting rating at 240VAC, this breaker helps you to protect electrical equipment and branch circuits from damage caused by overloads and short circuits while supporting system safety and operational continuity. Its compact footprint and bolt-on design make it a practical solution for new installations, upgrades, and maintenance projects where reliable circuit protection and remote shutdown capability are essential.

Key Features and Benefits

• 50 Amp Current Rating: For reliable branch circuit protection.
• 3-Pole Configuration: Is designed for three-phase electrical systems.
• 120VAC Shunt Trip: Enables remote tripping for emergency shutdown, safety interlocks, and automated control applications.
• Bolt-On Mounting Design: Provides a secure connection within compatible panelboards.
• Part of the Q-Line Series: Widely used in commercial and industrial power distribution systems.
• 10kA Interrupting Capacity at 240VAC: Helps safeguard equipment against fault conditions.
• HACR Rated: For use in heating, air conditioning, and refrigeration applications where applicable.
• Molded Case Construction: Is designed for long-term performance in demanding electrical environments.
  

Technical Specifications

• Part Number: THQB32050ST1
  
• Type: THQB
  
• Product Family: Q-Line
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Mounting: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 50 Amps
  
• Voltage Rating: 240VAC
  
• Interrupting Rating: 10kA @ 240VAC
  
• Shunt Trip Voltage: 120VAC
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 3.5 in.
  • Width: 4.0 in.
  • Depth: 2.81 in.

Material Compliance and Certifications

• Industry Standards: The THQB32050ST1 is manufactured to meet applicable industry standards associated with molded case circuit breakers and electrical distribution equipment.
• HACR Rating: Its HACR rating supports use in qualifying heating, ventilation, air conditioning, and refrigeration systems. Always verify compliance requirements and application suitability based on local electrical codes, project specifications, and equipment manufacturer recommendations.
  

Where It Works Best

• The THQB32050ST1 is well-suited for commercial buildings, industrial facilities, manufacturing operations, schools, healthcare environments, and other applications requiring dependable three-phase circuit protection. The integrated 120VAC shunt trip makes it particularly valuable in systems that require remote emergency shutdown capability, fire alarm interface functions, safety disconnect systems, equipment protection schemes, and automated building controls. It is also an excellent choice for panelboard installations where secure bolt-on mounting and reliable overcurrent protection are critical.