Engineered for commercial and industrial applications, the Square D QBL22125 provides 125 amps of thermal-magnetic protection. Belonging to the PowerPacT Q-Frame family, it delivers dependable long-time and instantaneous (LI) trip functions for robust electrical system defense. This unit mount breaker installs into Square D Q2 enclosures, control panels, and switchboards. Rated for 10 kAIC at 240VAC, it serves as an exact drop-in replacement for legacy Q22125 breakers.
CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489
Approval
CSA, IEC, NOM, UL
Temp Rating
-25C to 70C
Construction Features
HACR Rated
Product FAQs
7 answers
Can I use the QBL22125 to replace an older Q22125 breaker?
Yes, the QBL22125 is a PowerPacT Q-Frame breaker that serves as a direct drop-in replacement for the legacy Square D Q22125.
Does the QBL22125 mount onto a busbar or use wire lugs?
The QBL22125 is a unit-mount, feed-thru circuit breaker. It does not plug onto a panelboard bus; instead, it uses factory-installed lugs on both the line and load sides to terminate wiring.
What equipment is the QBL22125 designed to be installed in?
This breaker is compatible with Square D Q2 enclosures, meter mains, control panels, and switchboards designed to accept unit-mount Q-Frame breakers.
Is the QBL22125 suitable for systems with high available fault current?
The QBL22125 has a standard interrupting rating of 10 kAIC at 240VAC. If your electrical system has a higher available fault current, you must use a higher-rated Q-Frame breaker, such as the QDL, QGL, or QJL series.
What wire gauge and material can be used with the QBL22125 terminals?
The lugs on this breaker are rated for both aluminum and copper conductors, accepting wire sizes from 4 AWG up to 300 kcmil.
What type of trip protection does the QBL22125 provide?
It features a thermal-magnetic trip unit that provides both long-time (thermal) protection against continuous overloads and instantaneous (magnetic) protection against short circuits.
Can the trip settings on the QBL22125 be adjusted in the field?
No, this breaker features fixed thermal and fixed magnetic trip settings. It does not have adjustable dials for the long-time or instantaneous trip functions.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.