Overview
The ABB THHQB1150 is a 50-amp, 1-pole Q-Line bolt-on circuit breaker with 120V AC and 120/240V AC ratings. Its fixed thermal-magnetic trip provides long-time overload and instantaneous short-circuit protection with a 22 kA interrupting rating.
Product image shows a legacy GE-branded THHQB breaker; refer to the specifications below for the listed ratings.
Key Features
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Protection: Non-interchangeable fixed LI thermal-magnetic trip for overload and short-circuit protection.
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Installation: Bolt-on bus connection and load-side box lugs; suitable for reverse-feed applications.
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Compatibility: Use only in compatible ABB and legacy GE Q-Line equipment specifically listed for THHQB breakers; verify equipment labeling before installation.
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Performance: Rated 50A, 1-pole, 120/240V AC with 22 kAIC interrupting capacity and quick-make/quick-break operation.
Specifications
- Catalog Number: THHQB1150
- Series / Frame: Q-Line
- Amperage: 50A
- Poles / Phase: 1-pole / single-phase branch circuits
- Voltage: 120V AC and 120/240V AC
- Interrupting Rating: 22 kAIC at the listed AC voltage ratings
- Mounting: Bolt-on
- Trip Function: Fixed long-time and instantaneous thermal-magnetic
- Wire Range: 8-3 AWG copper or aluminum
- Terminal: Box lugs
- Calibration Temperature: 40°C
- Certifications / Markings: UL 489, UL File E11592, HACR
- UPC: 783164118308
Common Applications
For compatible residential and commercial branch circuits requiring a 50A single-pole bolt-on breaker with 22 kAIC capacity. A qualified electrical professional should verify the equipment listing, conductor sizing, and installation requirements.
