THHQB21100 - 100Amp Circuit Breaker

THHQB21100 - 100Amp Circuit Breaker

The THHQB21100 is a 100-amp, 2-pole molded case circuit breaker designed to provide dependable overcurrent and short-circuit protection in your commercial, industrial, and institutional electrical distribution systems.As part of the trusted Q-Line family, this THHQB bolt-on circuit breaker features a secure bolt-on mounting design that helps you to maintain a reliable electrical connection in demanding applications. Rated for 120/240VAC operation with a 22,000 AIC interrupting capacity, it is engineered to help you protect conductors, equipment, and branch circuits from potentially damaging fault conditions while supporting safe and efficient power distribution.

Built for performance and long-term reliability, the THHQB21100 is also HACR-rated, making it suitable for heating, air conditioning, and refrigeration applications where dependable circuit protection is essential. Its compact footprint allows for efficient installation in compatible panelboards and distribution equipment, making it a practical choice for electrical contractors, facility managers, maintenance teams, and OEM applications.

Key Features and Benefits

• 100 Amp current rating for higher-capacity branch circuit protection
• 2-pole configuration designed for 120/240VAC electrical systems
• 22kA AIC interrupting rating helps safeguard equipment during fault conditions
• Bolt-on mounting design provides a secure and stable connection.
• Q-Line series compatibility for use in designated electrical distribution equipment
• HACR rated for heating, air conditioning, and refrigeration applications
• Molded case construction designed for dependable performance and durability
• Compact size supports efficient installation and space utilization within electrical panels.

Technical Specifications

• Part Number: THHQB21100
  
• Type: THHQB
  
• Circuit Breaker Style: Molded Case Circuit Breaker
  
• Mounting Type: Bolt-On
  
• Series: Q-Line
  
• Poles: 2
  
• Amperage Rating: 100 Amps
  
• Voltage Rating: 120/240VAC
  
• Interrupting Capacity (AIC): 22kA
  
• HACR Rated: Yes
  
• Height: 3.5 in.
  
• Width: 2.0 in.
  
• Depth: 2.81 in.
  

Material Compliance and Certifications

• HACR Rated for approved heating, ventilation, air conditioning, and refrigeration applications
• Manufactured to meet applicable industry performance and safety standards for molded case circuit breakers
• Designed for installation in compatible electrical distribution equipment in accordance with applicable electrical codes and manufacturer specifications

Where It Works Best

• The THHQB21100 is well-suited for commercial buildings, industrial facilities, office complexes, educational institutions, retail environments, and other electrical distribution systems requiring dependable 100-amp, 2-pole circuit protection. It is particularly effective in branch circuits serving HVAC equipment, motor loads, distribution panels, and other applications where reliable overcurrent protection and secure bolt-on installation are important for system performance and uptime.