THQB32020ST1 - 20Amp Circuit Breaker

THQB32020ST1 - 20 Amp Circuit Breaker

The THQB32020ST1 is a 20-amp, 3-pole molded case circuit breaker designed for dependable overcurrent protection in your commercial, industrial, and institutional electrical distribution systems. 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 for remote tripping capabilities when integrated into emergency shutdown, safety, or control systems. Its compact footprint helps you to maximize panel space while delivering consistent performance in demanding electrical applications. Featuring a 10kA interrupting capacity at 240VAC, the THQB32020ST1 is engineered to interrupt fault currents safely and protect connected equipment from damage caused by overloads and short circuits. The breaker is also HACR rated, making it suitable for heating, air conditioning, and refrigeration applications where dependable protection is essential.

Key Features and Benefits

• 20 Amp Current Rating: For branch circuit protection in a variety of commercial and industrial applications.
• 3-Pole Configuration: Provides protection across three phases, making it ideal for three-phase electrical systems.
• 120VAC Shunt Trip Mechanism: Enables remote tripping for enhanced safety, emergency disconnect functions, and automated control systems.
• 10kA Interrupting Capacity at 240VAC: Helps safeguard electrical equipment during fault conditions.
• Bolt-On Mounting Design: Ensures a secure connection within compatible panelboards and distribution equipment.
• Q-Line Series Construction: Is designed for reliable operation and long service life.
• HACR Rated: For use in heating, ventilation, air conditioning, and refrigeration equipment applications.
• Molded Case Design: Helps protect internal components from environmental and operational stresses.
  

Technical Specifications

• Part Number: THQB32020ST1
  
• Type: THQB
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Mounting: Bolt-On
  
• Series: Q-Line
  
• Poles: 3
  
• Amperage Rating: 20 Amps
  
• Voltage Rating: 240VAC
  
• Interrupting Capacity: 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 THQB32020ST1 is manufactured to meet applicable industry standards for molded case circuit breakers and is designed for installation in compatible electrical distribution systems.
• HACR Rating: Its HACR rating confirms suitability for HVAC and refrigeration-related applications, helping electrical professionals maintain code-compliant installations when used according to manufacturer specifications and local electrical codes.
  

Where It Works Best

• The THQB32020ST1 is well-suited for commercial buildings, industrial facilities, manufacturing operations, HVAC systems, refrigeration equipment, control panels, and electrical distribution systems requiring both reliable overcurrent protection and remote trip functionality. Its integrated 120VAC shunt trip makes it particularly valuable in installations where emergency power disconnects, fire safety systems, access control integration, or automated shutdown procedures are required.