THHQB2190 - 90Amp Circuit Breaker

THHQB2190 - 90Amp Circuit Breaker

The THHQB2190 circuit breaker is a dependable 90-amp, 2-pole molded-case circuit breaker designed to provide reliable overcurrent and short-circuit protection for your commercial, industrial, and heavy-duty electrical distribution systems. Built as part of the trusted THHQB Q-Line series, this bolt-on circuit breaker offers secure installation and consistent performance in panelboard applications where safety and system uptime are critical. With a 22kA interrupting rating at 120/240VAC, the THHQB2190 is engineered to help you protect electrical equipment and branch circuits from potentially damaging fault conditions while supporting efficient power distribution throughout the facility.

Its bolt-on mounting design helps ensure a firm electrical connection, reducing vibration-related issues and maintaining long-term reliability. The breaker’s HACR rating also makes it suitable for applications involving heating, air conditioning, and refrigeration equipment, making it a versatile solution for a wide range of electrical systems. Whether you are installing in commercial buildings, industrial facilities, schools, healthcare environments, or other demanding applications, the THHQB2190 delivers the protection and performance professionals expect from a high-quality molded-case circuit breaker.

Key Features and Benefits

• 90 Amp current rating for higher-capacity branch circuit protection
• 2-pole configuration for 120/240VAC electrical systems
• 22kA A.I.C. rating at 120/240VAC for effective fault interruption
• THHQB Q-Line design for compatibility with applicable Q-Line panelboards
• The bolt-on mounting style helps ensure a secure, stable installation.
• HACR rated for heating, air conditioning, and refrigeration applications
• Molded case construction designed for durability and dependable operation
• Helps protect electrical equipment from overloads and short circuits
• Suitable for commercial, industrial, and institutional electrical systems

Technical Specifications

• SpecificationDetails
• Part Number: THHQB2190
• Type: THHQB
• Circuit Breaker Style: Molded Case Circuit Breaker
• Series: Q-Line
• Mounting Type: Bolt-On
• Poles: 2
• Amperage Rating: 90 Amps
• Voltage Rating: 120/240VAC
• A.I.C. Rating: 22kA @ 120/240VAC
• HACR Rated: Yes
• Height: 3.5 in.
• Width: 2.0 in.
• Depth: 2.81 in.

Material Compliance and Certifications

• The THHQB2190 circuit breaker is manufactured and tested to meet applicable industry performance and safety requirements for molded case circuit breakers. Its HACR rating confirms suitability for approved heating, ventilation, air conditioning, and refrigeration applications. Users should always verify specific code, compliance, and installation requirements for their project and local jurisdiction before installation.
• UL Standards: When installed according to electrical codes, you can have confidence that this unit adheres to expected construction and compliance benchmarks.

Where It Works Best

• The THHQB2190 is an excellent choice for electrical distribution systems requiring dependable 90-amp overcurrent protection. Common applications include:
• Commercial office buildings
• Retail facilities and shopping centers
• Industrial manufacturing environments
• Educational and institutional facilities
• Healthcare and medical buildings
• Mechanical equipment circuits
• HVAC and refrigeration systems
• Panelboard distribution applications
• Electrical infrastructure upgrades and maintenance projects
• Designed for dependable protection and secure bolt-on installation, the THHQB2190 90 Amp 2-Pole Q-Line Circuit Breaker helps maintain electrical system safety while supporting reliable power distribution in demanding environments.