THQB21100 - 100A Circuit Breaker

THQB21100 - 100A Circuit Breaker

The THQB21100 is a 100-amp, 2-pole, bolt-on molded-case circuit breaker designed for dependable overcurrent and short-circuit protection in your commercial, industrial, and residential electrical distribution systems. As part of the trusted Q-Line series, this THQB circuit breaker provides secure bolt-on installation for enhanced connection stability in compatible panelboards. With a 10kA interrupting capacity at 120/240VAC, it helps you to safeguard electrical equipment and branch circuits from damaging fault conditions while supporting reliable system performance. Built for demanding electrical environments, the THQB21100 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 use of panel space while delivering the high-current protection required for larger loads. Whether used in new installations, equipment upgrades, or maintenance projects, this breaker offers a practical solution for protecting electrical infrastructure and maintaining system continuity.

Key Features and Benefits

• 100-amp current rating for higher-capacity electrical circuits
• 2-pole configuration for 120/240VAC applications
• Bolt-on mounting design helps provide a secure and stable connection
• Part of the proven Q-Line family of circuit breakers
• 10kA interrupting capacity at 120/240VAC for fault protection
• HACR rated for heating, air conditioning, and refrigeration equipment
• Molded case construction designed for long-term durability and dependable operation
• Compact design helps maximize available panelboard space
• Suitable for commercial, industrial, and residential electrical systems

Technical Specifications

• Part Number: THQB21100
• Type: THQB
• Circuit Breaker Style: Molded Case Circuit Breaker
• Mounting: Bolt-On
• Series: Q-Line
• Poles: 2
• Amperage: 100A
• Voltage Rating: 120/240VAC
• Interrupting Capacity: 10kA
• 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 standards for molded case circuit breakers
• Designed for installation in compatible electrical distribution equipment and panelboards

Where It Works Best

• The THQB21100 is well-suited for protecting feeder circuits, large branch circuits, HVAC equipment, commercial panelboards, industrial machinery, and other high-demand electrical loads operating on 120/240VAC systems. Its bolt-on design makes it particularly useful in applications where a secure mechanical and electrical connection is preferred, helping maintain reliable performance in commercial facilities, industrial environments, multifamily buildings, and residential service equipment.