Overview
The ABB THHQB21100 is a 100-amp, 2-pole Q-Line bolt-on circuit breaker for 120/240V AC electrical distribution systems. Its fixed thermal-magnetic trip provides long-time overload and instantaneous short-circuit protection with a 22 kA interrupting rating.
Key Features
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Protection: Non-interchangeable, fixed LI thermal-magnetic trip with common-trip operation.
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Installation: Bolt-on bus connection with load-side box lugs; suitable for reverse-feed applications.
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Compatibility: Intended for compatible ABB and legacy GE Q-Line panelboards specifically listed for THHQB breakers; verify equipment labeling before installation.
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Performance: Rated 100A, 2-pole, 120/240V AC with 22 kAIC interrupting capacity.
Specifications
- Catalog Number: THHQB21100
- Series / Frame: Q-Line
- Amperage: 100A
- Poles / Phase: 2-pole / single-phase applications
- Voltage: 120/240V AC
- Interrupting Rating: 22 kAIC
- Mounting: Bolt-on
- Trip Function: Fixed long-time and instantaneous thermal-magnetic
- Wire Range: 6-1/0 AWG copper or 4-1/0 AWG aluminum
- Terminal: Box lugs
- Temperature Rating: 40°C
- Certifications / Markings: UL 489, UL File E11592, HACR
- UPC: 783164134988
Common Applications
Suitable for compatible commercial and light-industrial panelboard distribution, feeder, and branch-circuit applications where a 100A two-pole bolt-on breaker with 22 kAIC capacity is required. Installation and equipment compatibility should be verified by a qualified electrical professional.
