THQL21100ST1 - 100Amp Circuit Breaker

THQL21100ST1 - 100 Amp Circuit Breaker

The THQL21100ST1 is a 100-amp, 2-pole molded case circuit breaker designed to provide dependable overcurrent protection for your residential, commercial, and light industrial electrical distribution systems. As part of the widely used THQL Q-Line series, this plug-on breaker combines reliable circuit protection with the added functionality of a 120VAC shunt trip, allowing for remote tripping capability when integrated into emergency shutdown, safety, or control systems. Rated for 120/240VAC applications with a 10kA interrupting capacity, the THQL21100ST1 helps you protect electrical equipment and wiring from damage caused by overloads and short circuits while supporting modern safety requirements. Its compact design allows for efficient installation in compatible load centers and panelboards, making it a practical solution for new installations, upgrades, and maintenance projects where remote disconnect functionality is required.

Key Features and Benefits

• 100 Amp Current Rating: For higher-capacity branch circuit and feeder protection.
• 2-Pole Configuration: Designed for 120/240VAC electrical systems.
• Integrated 120VAC Shunt Trip: Enables remote breaker operation for emergency shutdown and control applications.
• THQL Q-Line Design: Ensures compatibility with designated Q-Line load centers and panelboards.
• Plug-On Installation: Supports faster installation and simplified maintenance.
• 10kA Interrupting Capacity: Helps safeguard electrical systems against fault conditions.
• HACR Rated: For use in heating, air conditioning, and refrigeration equipment applications.
• Molded Case Construction: Provides long-lasting protection in demanding electrical environments.
• Compact Footprint: Helps maximize available panel space.
  

Technical Specifications

• Part Number: THQL21100ST1
  
• Type: THQL
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Series: Q-Line
  
• Poles: 2
  
• Amperage Rating: 100 Amps
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity: 10kA
  
• Trip Feature: 120VAC Shunt Trip
  
• Mounting Style: Plug-On
  
• HACR Rated: Yes
  
• Dimensions:
  • Height: 3.31 in.
  • Width: 3.00 in.
  • Depth: 2.81 in.

Material Compliance and Certifications

• Industry Standards: The THQL21100ST1 is manufactured to meet applicable industry performance and safety standards associated with molded case circuit breakers.
• HACR Rating: Its HACR rating makes it suitable for applications involving heating, ventilation, air conditioning, and refrigeration equipment.
• Installation Requirements: Proper installation should always be performed in accordance with local electrical codes, equipment specifications, and applicable regulatory requirements.
  

Where It Works Best

• The THQL21100ST1 is well-suited for electrical systems that require both overcurrent protection and remote tripping capability. Common applications include commercial buildings, industrial control systems, emergency power disconnect circuits, HVAC equipment, machinery protection, safety shutdown systems, and electrical distribution panels. Its combination of a 100-amp rating, Q-Line compatibility, and integrated shunt trip functionality makes it an excellent choice for projects where operational safety, equipment protection, and remote control capabilities are important.