Designed for commercial and industrial applications, the Q2L3100 is a 3-pole molded case circuit breaker from Square D. It delivers 100A of thermal-magnetic protection with fixed long-time and instantaneous (LI) trip functions. This unit mount MCCB installs into Square D individual enclosures, switchboards, and NQOD panelboards. Featuring a 10kAIC rating, Visi-Trip indicator, and common trip functionality, it ensures safe operation. It is replaced by the QBL32100.
HACR Rated, Non-Interchangeable Trip, Common Trip, Quick-Make/Quick-Break
Product FAQs
6 answers
Which panelboards and enclosures are compatible with the Q2L3100?
This breaker is designed for use in legacy Square D NQOD panelboards, switchboards, and individual enclosures that accept Q-Frame unit-mount breakers.
Is the Q2L3100 an obsolete breaker, and what replaces it?
Yes, the Q2L series is a legacy frame that is no longer in active production. Square D PowerPact Q-Frame breakers (such as the QB, QD, or QG series) are the modern functional substitutes. However, installing an exact Q2L3100 replacement is often required to maintain the original UL listing of legacy NQOD panels.
What are the wire size requirements for the Q2L3100 lugs?
The factory-installed lugs accept wire gauges from 4 AWG up to 300 kcmil. Both aluminum and copper conductors are supported.
Can the Q2L3100 be installed in a 480V or 600V system?
No, this breaker has a maximum voltage rating of 240VAC. It cannot be used in 480V or 600V electrical systems.
Does this breaker plug onto a panelboard bus?
No, the Q2L3100 is a unit-mount, feed-thru circuit breaker. It must be bolted directly to the mounting pan or enclosure rather than plugging into a busbar. It features lugs on both the line and load sides.
Are the trip settings adjustable on the Q2L3100?
No, this breaker features a thermal-magnetic trip unit with fixed Long-Time (L) and fixed Instantaneous (I) protection settings.
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