The ABB Q-Line THQL21100P is a 100A, 120/240V thermal-magnetic circuit breaker offering GFCI protection and Type THQL fit; it suits residential and light commercial panels, with a 1.06 in. handle and 3.5 in. overall depth for tight spaces. Key specs: 100 A rating, 10 kAIC interrupting capacity, trip class standard. How reliable is it? Generally dependable — robust build, standard fitment, straightforward install. What about compatibility? Works with THQL load centers and many retrofit scenarios.
Key Takeaways
- Robust 100 A, 120/240 V two-pole breaker delivering consistent trip accuracy for heavy-duty residential and commercial circuits.
- Thermal-magnetic design provides fast fault clearing, reliable GFCI protection, and clear trip indication.
- Fits standard THQL load centers with one-inch-per-pole form factor and straightforward installation.
- Built from high-grade thermoplastics and plated contacts for durable, long-lasting performance.
- UL/NEC compliant with proper coordination and panel compatibility guidance for safe, code-compliant use.
Product Overview and Key Specifications
While designed for heavy-duty residential and commercial applications, the ABB Q-Line THQL21100P presents itself as a straightforward, high-capacity two-pole breaker that installers and informed homeowners can evaluate quickly.
It is a 100A, 120/240 V circuit breaker, THQL two-pole format, fitting THQL load centers.
What are the key specs? 100 amps, two poles, 120/240 volts, one-inch-per-pole width.
How easy is installation? Fits standard THQL bus, straightforward mounting for electricians or experienced DIYers.
Practical considerations: panel space, load calculations, and matching panel labeling.
Materials emphasize durability, compact form, and clear trip indication.
Performance, Safety Features, and Compliance
Because performance and safety determine a breaker’s suitability for critical circuits, the ABB Q-Line THQL21100P is assessed on trip accuracy, fault interruption, and compliance with applicable codes.
Because performance and safety determine suitability, the ABB Q-Line THQL21100P is evaluated for trip accuracy, fault interruption, and code compliance
It delivers consistent trip thresholds for 100 A, 120/240 V service, and fast fault clearing via thermal-magnetic action.
What safety features exist? GFCI protection, internal arc resistance, and clear trip indicators.
How does it comply? Meets UL/NEC standards and relevant efficiency ratings for energy-conscious installations.
Practical notes: expect 100 A continuous rating, coordination with upstream devices, and positive user feedback on reliability and measured interruption times.
Installation, Compatibility, and Build Quality
When evaluating installation, compatibility, and build quality for the ABB Q-Line THQL21100P, attention to mounting, bus fit, and material robustness is essential for a trouble-free deployment.
The breaker installs easily into any THQL load center; installation tips include turning main power off, confirming 120/240 V panel rating, and using 3/8–1/2 in. torque on terminal screws.
What compatibility factors matter? Match panel type, bus stab spacing, and available 2-inch cabinet depth.
Construction uses high-grade thermoplastics and plated copper/steel contacts, one-inch per pole width, Quick-make/Quick-break mechanism, and clear trip indication for reliable longevity.
Frequently Asked Questions
Can This Breaker Be Used in RV or Marine Electrical Panels?
Approximately 70% of RVs use 30A or 50A services; the breaker can be used if panel compatibility, GFCI requirements and marine safety standards are met. RV electrical and marine safety compliance must be verified by a professional.
What Is the Warranty Period and How to Make a Claim?
The warranty details typically cover limited product defects for one year; the claim process requires contacting ABB/GE customer support with proof of purchase, product information, and photos, then following return authorization and replacement or repair instructions.
Does It Support Tandem/Space-Saver Installations in Panels?
No; it does not permit tandem/space-saver use. Like a lone sentinel, it requires full two-pole space, so tandem installation benefits and space saver advantages are unavailable—proper fit demands dedicated THQL two-pole positions in the panel.
Are Replacement Parts or Accessories Available Locally?
Yes, local availability of replacement options is common; the product’s breakers and compatible accessories are sold through electrical distributors, big-box retailers, and authorized ABB dealers, ensuring accessible parts and support for installations and repairs.
Can This Breaker Be Used With Surge Protection Devices?
An ounce of prevention is worth a pound of cure. Yes, the breaker supports surge compatibility when installed per manufacturer guidance; professionals guarantee proper device integration, coordinating GFCI, SPD placement, and panel ratings for safe operation.
