Operating at 240VAC, the Square D QBL32100 is a 3-pole, 100A molded case circuit breaker. It utilizes fixed thermal-magnetic trip technology to provide essential long-time and instantaneous (LI) protection for commercial facilities. This PowerPacT Q-frame breaker utilizes a unit-mount design for installation into panelboards and switchboards. It is fully compatible as a replacement for legacy Q23100 breakers.
CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB1, NOM-003-SCFI-2000, UL 489
Approval
CSA, IEC, NOM, UL
Temp Rating
-25C to 70C
Construction Features
HACR Rated, Visual Trip Indicator
Product FAQs
9 answers
What enclosures or panels are compatible with the QBL32100 breaker?
This PowerPacT Q-frame unit-mount breaker is designed for installation in individual enclosures, switchboards, and panelboards where it can function safely as a main or sub-feed breaker.
Does the QBL32100 mount directly to an I-Line panelboard bus?
No, the QBL32100 is strictly a unit-mount circuit breaker. Applications requiring a plug-on I-Line group-mounted connection must use a different PowerPacT Q-frame model, such as the QBA or QDA series.
Can the QBL32100 be used to replace older Square D breakers?
Yes, the PowerPacT Q-frame series serves as a direct replacement for legacy Square D Q2 series devices. The QBL32100 is fully compatible as a drop-in upgrade for the obsolete Q23100 breaker.
How is the QBL32100 breaker wired into a circuit?
It utilizes a feed-thru connection design. The breaker comes factory-equipped with mechanical lugs on both the line and load ends, requiring stripped cable connections rather than specialized busbar mounting hardware.
Are the terminals on the QBL32100 rated for aluminum wiring?
Yes, the included line and load lugs are dual-rated for both aluminum and copper conductors. They accept wire sizes ranging from 4 AWG up to 300 kcmil.
What are the magnetic trip thresholds for this 100A breaker?
While the continuous load rating is 100A, the fixed thermal-magnetic trip unit features a magnetic hold current of 1200A and a magnetic tripping current of 2400A.
What does the QBL prefix indicate about the breaker ratings and design?
In the PowerPacT Q-frame family, the letter B signifies a standard interrupting rating of 10kA at 240VAC. The letter L indicates a unit-mount configuration featuring wire lugs on both the line and load sides.
Can the QBL32100 be installed in a 480V electrical system?
No, this PowerPacT Q-frame breaker is rated for a maximum of 240VAC. It is appropriate for 120V, 208V, and 240V AC applications but cannot be safely used in 480V or 600V distribution systems.
How does the QBL32100 respond to electrical faults?
The breaker uses a thermal-magnetic trip unit with fixed long-time and instantaneous (LI) functions. The thermal element safely trips the breaker during sustained overloads, while the magnetic element provides instantaneous protection against severe short-circuit events.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.