THQB2140ST1 - 40Amp Circuit Breaker

THQB2140ST1 - 40 Amp Circuit Breaker

The THQB2140ST1 is a 40 amp, 2-pole molded case circuit breaker designed to provide dependable overcurrent protection for your commercial, industrial, and institutional electrical distribution systems. As part of the trusted THQB Q-Line family, this bolt-on circuit breaker delivers secure panelboard installation while helping you safeguard equipment and branch circuits operating on 120/240VAC systems. Equipped with a factory-installed 120VAC shunt trip, the THQB2140ST1 allows for remote tripping capability, making it an excellent choice for emergency shutdown applications, fire safety integration, and automated control systems where rapid circuit interruption is required. Built for reliable performance in demanding environments, this HACR-rated circuit breaker combines thermal-magnetic protection with a compact footprint, making it suitable for a wide range of HVAC, lighting, power distribution, and machinery protection applications. Its bolt-on mounting design helps you to ensure a stable electrical connection, reducing the risk of unwanted movement or vibration in panelboard installations.

Key Features and Benefits

• 40 amp current rating: For dependable branch circuit protection.
• 2-pole configuration: Designed for 120/240VAC electrical systems.
• Integrated 120VAC shunt trip: Enables remote circuit interruption.
• Bolt-on mounting design: Provides a secure installation within compatible panelboards.
• Part of the proven Q-Line THQB circuit breaker series: Delivers trusted performance.
• HACR rated: For heating, air conditioning, and refrigeration equipment applications.
• Thermal-magnetic trip mechanism: Helps protect against overloads and short circuits.
• Compact molded case construction: Helps maximize panel space efficiency.
• Suitable for commercial, industrial, and institutional electrical systems: Designed for demanding applications.
  

Technical Specifications

• Part Number: THQB2140ST1
  
• Type: THQB
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Mounting Style: Bolt-On
  
• Poles: 2
  
• Amperage Rating: 40 Amps
  
• Voltage Rating: 120/240VAC
  
• Interrupting Rating (A.I.C.): 10kA @ 120/240VAC
  
• Shunt Trip Voltage: 120VAC
  
• HACR Rated: Yes
  
• Product Family: Q-Line
  
• Dimensions:
  • Height: 3.5 in.
  • Width: 3.0 in.
  • Depth: 2.81 in.

Material Compliance and Certifications

• HACR Rated: For use in heating, air conditioning, and refrigeration applications.
• Industry Standards: Manufactured to meet applicable industry standards for molded case circuit breakers.
• Equipment Compatibility: Designed for use in compatible electrical distribution equipment and panelboards.
• Protection Technology: Thermal-magnetic protection technology for enhanced circuit safety and performance.
  

Where It Works Best

• The THQB2140ST1 is well suited for commercial buildings, industrial facilities, educational campuses, healthcare environments, retail spaces, and other locations that require dependable overcurrent protection with remote trip functionality. Its integrated 120VAC shunt trip makes it particularly valuable in emergency power disconnect systems, fire alarm interfaces, building automation systems, HVAC equipment protection, and control circuits where fast remote shutdown capabilities are essential. Whether protecting critical equipment or supporting advanced safety systems, the THQB2140ST1 offers a practical combination of circuit protection, installation security, and remote tripping functionality for modern electrical infrastructure.