SQUARE D
SQUARE D QO2150 Miniature Circuit Breaker 150A 2 Pole 120/240V
A 150 A, two-pole plug-in breaker rated 120/240 V AC with a 10 kA interrupting capacity for QO load centres
- ColorTransparent
- 150 A protection for high-demand circuits with 10 kA interrupting rating
- Two-pole design handles 120/240 V AC and 48 V DC systems
- Plug-in mounting fits QO load centres and NQ panelboards directly
- Compact 3.5 in length by 1.5 in width saves panel space
- Paddle actuator and lug terminals simplify installation and maintenance
150A QO Miniature Breaker
The SQUARE D QO2150 is a 150A two-pole miniature circuit breaker designed for QO load centres and NQ panelboards. It provides standard over-current protection for single-phase 120/240V AC systems and carries a 48V DC rating. The plug-in mounting style suits compatible panelboards in residential and light-commercial electrical installations.
Verify panelboard series and space
Confirm the target panelboard is a QO load centre or NQ panelboard before ordering, as the breaker is built for that specific series. The unit requires two adjacent pole spaces and uses a plug-in connection with lug terminals. Check that the available slot width matches the 1.5 in dimension and that the mounting depth accommodates 2.9 in behind the cover.
Sustained load and interrupting rating
The breaker carries a maximum AIR rating of 10kA at 120/240V AC, defining its ability to interrupt fault current under sustained stress. Thermal calibration is referenced at a minimum operating temperature of 77 Degrees F, so continuous current handling assumes that ambient baseline. The 100A frame size sets the physical envelope for long-term thermal performance within the enclosure.
Highlights
- 150 A protection for high-demand circuits with 10 kA interrupting rating
- Two-pole design handles 120/240 V AC and 48 V DC systems
- Plug-in mounting fits QO load centres and NQ panelboards directly
- Compact 3.5 in length by 1.5 in width saves panel space
- Paddle actuator and lug terminals simplify installation and maintenance
Specifications
| Brand | SQUARE D |
|---|---|
| Color | Transparent |
Questions about this item
Does the QO2150 breaker come with the terminal lugs or must they be purchased separately?
The breaker includes a terminal lug connection so no separate lugs are required for installation.
Should I choose the 150 A two-pole version or a lower-amperage model for my QO load centre?
Select the 150 A two-pole QO2150 when the circuit requires 150 A at 120/240 V AC; match the breaker amperage to the conductor and load calculation for the branch circuit.
What does the 10 kA AIR rating mean when the QO2150 is installed in a panel?
The 10 kA interrupting rating at 120/240 V AC means the breaker can safely clear a short-circuit current up to 10 000 amps in a compatible QO load centre.
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