THQB32040ST1 - 40Amp Circuit Breaker

THQB32040ST1 - 40 Amp Circuit Breaker

The THQB32040ST1 is a 40-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 THQB Q-Line family, this bolt-on circuit breaker combines reliable circuit protection with the added functionality of a 120VAC shunt trip, allowing remote tripping capability for enhanced safety, emergency shutdown applications, and integrated control systems. With a 10kA interrupting rating at 240VAC, the THQB32040ST1 is engineered to help protect your conductors and connected equipment from damage caused by overloads and short circuits while supporting the operational demands of modern electrical installations.

Its bolt-on mounting design helps provide a secure connection within compatible panelboards, while the compact footprint makes it well-suited for installations where space efficiency is important. The breaker is also HACR rated, making it appropriate for use in heating, air conditioning, and refrigeration applications that require dependable protection and performance.

Key Features and Benefits

• 40 Amp Current Rating: For reliable branch circuit protection.
• 3-Pole Configuration: Designed for three-phase electrical systems.
• 120VAC Shunt Trip Feature: Enables remote tripping for emergency shutdown and control applications.
• 10kA Interrupting Capacity at 240VAC: Helps protect electrical systems during fault conditions.
• Bolt-On Mounting Design: Provides a secure installation in compatible equipment.
• THQB Q-Line Series Construction: Is known for dependable performance in commercial and industrial environments.
• HACR Rated: For use in heating, air conditioning, and refrigeration applications.
• Molded Case Design: Offers durability and long service life in demanding operating conditions.
  

Technical Specifications

• Part Number: THQB32040ST1
  
• Type: THQB
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Mounting: Bolt-On
  
• Poles: 3
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 240VAC
  
• Interrupting Rating: 10kA @ 240VAC
  
• Shunt Trip Voltage: 120VAC
  
• HACR Rated: Yes
  
• Product Family: Q-Line
  
• Dimensions:
  • Height: 3.5 in.
  • Width: 4.0 in.
  • Depth: 2.81 in.

Material Compliance and Certifications

• Industry Standards: The THQB32040ST1 is manufactured to meet applicable industry standards for molded case circuit breakers and is designed for installation in accordance with relevant electrical codes and manufacturer requirements.
• HACR Rating: The HACR rating supports its use in approved heating, ventilation, air conditioning, and refrigeration systems.
• Application Requirements: Always verify application requirements and local code compliance before installation.
  

Where It Works Best

• The THQB32040ST1 is an excellent choice for commercial buildings, industrial facilities, manufacturing environments, educational campuses, healthcare facilities, and HVAC control systems where reliable overcurrent protection and remote tripping capability are required. Its combination of a 40-amp rating, three-pole protection, and integrated 120VAC shunt trip functionality makes it particularly useful in safety circuits, emergency power disconnect applications, equipment protection systems, and three-phase distribution networks.