Description
2-Pole Q-Line Plug-In Circuit Breakers
ABB Q-Line two-pole plug-in circuit breakers serve compatible load-center and distribution applications. The listed THQL models offer ampere ratings from 15A through 125A.
Small details.
Big decisions.
Look beyond the amp rating. These four checks help narrow the right breaker configuration.
MISSION.A little precision. A smarter selection.
Current Selection
This Q-Line group offers 15A through 125A configurations. Match the circuit requirement and conductor sizing to the selected rating.
2-Pole Plug-In Design
The breaker uses a 2-pole plug-in configuration for approved distribution equipment. Confirm the bus connection and physical mounting arrangement.
Equipment-Specific Selection
Use the breaker only in an approved panelboard or load-center configuration. The family name alone does not establish complete equipment compatibility.
Voltage & Fault Rating
Check the voltage and interrupting rating for the exact catalog number. Compare the applicable rating to the installation’s available fault current.
Before you select
Match the circuit. Check the fit.Rating & Protection
Match the ampere rating, pole count and required protection functions to the circuit. Use the exact breaker configuration specified for the application.
Electrical Ratings
Confirm system voltage and interrupting capacity against the installation requirements. Ratings must be checked for the selected catalog number.
Fit & Connections
Confirm the approved panelboard or load center, mounting style, terminal requirements and neutral connection before replacing a breaker.
Ask Willy: Need Help Selecting This ABB Circuit Breaker?
Send us the ABB catalog number, equipment model and required circuit breaker configuration so our team can help review your selection.
Important Product Questions
Can I replace a breaker using only the same amp rating?
No. Match the catalog number, poles, voltage, interrupting capacity, protection functions and equipment approval. Equal amperage alone does not establish interchangeability.
What can prevent a physically similar breaker from being suitable?
A different bus connection, neutral arrangement, voltage rating or protection function can rule out a replacement. Check the exact panelboard or load-center requirements.
What details help confirm the correct replacement?
Provide the existing breaker catalog number, equipment identification, circuit rating and required protection type. Include the neutral and mounting arrangement where applicable.
Important Model Distinction
Ampere rating, pole count, trip function, neutral connection, operating voltage and interrupting capacity depend on the selected catalog number. Similar appearance does not establish equipment compatibility.
