QO Plug-in Series
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Part #SQD QO120 20AMP 1POLE 120VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120, 1-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 1 Pole, 1 ph, Pressu
MFG #QO120
474 in Stock. More available 05/08/2026 and 05/27/2026
$20.16/EA
Part #SQD QO2020 20AMP/20AMP 1POLE 120VAC (2)20AMP 1POLE CIRCUITS PLUG-IN CIRCUIT BREAKER FOR USE IN NEW STYLE NON- CLASS CTL LOADCENTERS Square Dâ„¢ QOâ„¢ Miniature Circuit Breaker, Tandem, 120/240 VAC, 20 A, 50/60 Hz, 10 kA
MFG #QO2020
131 in Stock. More available 05/13/2026 and 05/27/2026
$108.05/EA
Part #SQD QO230 30AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO230, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 30 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pr
MFG #QO230
163 in Stock. More available 05/27/2026
$49.04/EA
Part #SQD QO115 15AMP 1POLE 120VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115, 1-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 15 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 1 Pole, 1 ph, Pressu
MFG #QO115
154 in Stock. More available 05/27/2026
$20.16/EA
Part #SQD QO120GFI 20AMP 1POLE 120VAC GROUND FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120GFI, Miniature Circuit Breaker, Class A Ground Fault, 120 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, K-Curve/Thermal Magneti
MFG #QO120GFI
28 in Stock. More available 05/27/2026
$132.99/EA
Part #SQD QO115GFI 15AMP 1POLE 120VAC GROUND FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115GFI, Class A Ground Fault Miniature Circuit Breaker, 120 VAC, 15 A, 60 Hz Frequency, 10 kA Interrupt, QO/100A Frame, Thermal/Magnetic Trip,
MFG #QO115GFI
12 in Stock. More available 05/27/2026
$128.83/EA
Part #SQD QO225 25AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO225, Standard Miniature Circuit Breaker, 120/240 VAC, 25 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pressure P
MFG #QO225
44 in Stock. More available 05/27/2026
$51.53/EA
Part #SQD QO350 50AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO350, Miniature Circuit Breaker, Standard, 240 VAC, 50 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Connectio
MFG #QO350
5 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QO260 60AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO260, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 60 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bo
MFG #QO260
109 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO1515 15AMP/15AMP 1POLE 120VAC (2)15AMP 1POLE CIRCUITS PLUG-IN CIRCUIT BREAKER FOR USE IN OLD STYLE NON- CLASS CTL LOADCENTERS Square Dâ„¢ QOâ„¢ Miniature Circuit Breaker, Tandem, 120/240 VAC, 15 A, 50/60 Hz, 10 kA
MFG #QO1515
62 in Stock. More available 05/12/2026 and 05/27/2026
$116.36/EA
Part #SQD QO220 20AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO220, Miniature Circuit Breaker, Standard, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pre
MFG #QO220
179 in Stock. More available 05/27/2026
$49.04/EA
Part #SQD QO240 40AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO240, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 40 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bo
MFG #QO240
92 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO250 50AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO250, Miniature Circuit Breaker, Standard, 120/240 VAC, 50 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box Lug C
MFG #QO250
80 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO120CAFI 20AMP 1POLE 120VAC COMBINATION ARC FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120CAFI, Combination Miniature Arc Fault Circuit Breaker, 120 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, K-Curv
MFG #QO120CAFI
12 in Stock. More available 05/08/2026 and 05/27/2026
$116.36/EA
Part #SQD QO270 70AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO270, Miniature Circuit Breaker, Standard, 120/240 VAC, 70 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box Lug C
MFG #QO270
10 in Stock. More available 05/27/2026
$112.21/EA
Part #SQD QO2125 125AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO2125, Standard Miniature Circuit Breaker, 120/240 VAC, 125 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph,
MFG #QO2125
Part #SQD QO120DF BRKR AFCI/GFCI 20A 1P 120V 10K Square Dâ„¢ QOâ„¢ Combination Miniature Circuit Breaker, Dual Function, 120 VAC, 20 A, 50/60 Hz, 10 kA Interrupt, Thermal Magnetic Trip, 1 Pole, 1 ph, Pressure Plate, 14 to 8 AW
MFG #QO120DF
21 in Stock. More available 05/27/2026
$149.09/EA
Part #SQD QO215 15AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO215, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 15 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1
MFG #QO215
72 in Stock. More available 05/27/2026
$51.12/EA
Part #SQD QO340 40AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO340, Miniature Circuit Breaker, Standard, 240 VAC, 40 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Connectio
MFG #QO340
4 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QOT2020 20AMP/20AMP 1POLE 120VAC (2)20AMP 1POLE CIRCUIT BREAKERS FOR OLD STYLE LOADCENTERS Square Dâ„¢, QOT2020, Miniature Circuit Breaker, Tandem, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QOT Frame, K-Curve/Thermal
MFG #QOT2020
36 in Stock. More available 05/27/2026
$54.03/EA
Part #SQD QO360 60AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO360, 3-Pole Miniature Circuit Breaker, Standard, 240 VAC, 60 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Co
MFG #QO360
7 in Stock. More available 05/27/2026
$170.39/EA
Part #SQD QO115DF BRKR AFCI/GFCI 15A 1P 120V 10K Square Dâ„¢ QOâ„¢ Combination Miniature Circuit Breaker, Dual Function, 120 VAC, 15 A, 50/60 Hz, 10 kA Interrupt, Thermal Magnetic Trip, 1 Pole, 1 ph, Pressure Plate, 14 to 8 AW
MFG #QO115DF
9 in Stock. More available 05/27/2026
$184.94/EA
Part #SQD QO330 30AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO330, Miniature Circuit Breaker, Standard, 240 VAC, 30 A, 60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Toggle Actuator, Pre
MFG #QO330
20 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QO2100 100AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO2100, Miniature Circuit Breaker, Standard, 120/240 VAC, 100 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box L
MFG #QO2100
71 in Stock. More available 05/27/2026
$132.99/EA
Part #SQD QO120 20AMP 1POLE 120VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120, 1-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 1 Pole, 1 ph, Pressu
MFG #QO120
474 in Stock. More available 05/08/2026 and 05/27/2026
$20.16/EA
Part #SQD QO2020 20AMP/20AMP 1POLE 120VAC (2)20AMP 1POLE CIRCUITS PLUG-IN CIRCUIT BREAKER FOR USE IN NEW STYLE NON- CLASS CTL LOADCENTERS Square Dâ„¢ QOâ„¢ Miniature Circuit Breaker, Tandem, 120/240 VAC, 20 A, 50/60 Hz, 10 kA
MFG #QO2020
131 in Stock. More available 05/13/2026 and 05/27/2026
$108.05/EA
Part #SQD QO230 30AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO230, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 30 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pr
MFG #QO230
163 in Stock. More available 05/27/2026
$49.04/EA
Part #SQD QO115 15AMP 1POLE 120VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115, 1-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 15 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 1 Pole, 1 ph, Pressu
MFG #QO115
154 in Stock. More available 05/27/2026
$20.16/EA
Part #SQD QO120GFI 20AMP 1POLE 120VAC GROUND FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120GFI, Miniature Circuit Breaker, Class A Ground Fault, 120 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, K-Curve/Thermal Magneti
MFG #QO120GFI
28 in Stock. More available 05/27/2026
$132.99/EA
Part #SQD QO115GFI 15AMP 1POLE 120VAC GROUND FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115GFI, Class A Ground Fault Miniature Circuit Breaker, 120 VAC, 15 A, 60 Hz Frequency, 10 kA Interrupt, QO/100A Frame, Thermal/Magnetic Trip,
MFG #QO115GFI
12 in Stock. More available 05/27/2026
$128.83/EA
Part #SQD QO225 25AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO225, Standard Miniature Circuit Breaker, 120/240 VAC, 25 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pressure P
MFG #QO225
44 in Stock. More available 05/27/2026
$51.53/EA
Part #SQD QO350 50AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO350, Miniature Circuit Breaker, Standard, 240 VAC, 50 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Connectio
MFG #QO350
5 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QO260 60AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO260, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 60 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bo
MFG #QO260
109 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO1515 15AMP/15AMP 1POLE 120VAC (2)15AMP 1POLE CIRCUITS PLUG-IN CIRCUIT BREAKER FOR USE IN OLD STYLE NON- CLASS CTL LOADCENTERS Square Dâ„¢ QOâ„¢ Miniature Circuit Breaker, Tandem, 120/240 VAC, 15 A, 50/60 Hz, 10 kA
MFG #QO1515
62 in Stock. More available 05/12/2026 and 05/27/2026
$116.36/EA
Part #SQD QO220 20AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO220, Miniature Circuit Breaker, Standard, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Pre
MFG #QO220
179 in Stock. More available 05/27/2026
$49.04/EA
Part #SQD QO240 40AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO240, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 40 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Bo
MFG #QO240
92 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO250 50AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO250, Miniature Circuit Breaker, Standard, 120/240 VAC, 50 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box Lug C
MFG #QO250
80 in Stock. More available 05/27/2026
$53.20/EA
Part #SQD QO120CAFI 20AMP 1POLE 120VAC COMBINATION ARC FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO120CAFI, Combination Miniature Arc Fault Circuit Breaker, 120 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, K-Curv
MFG #QO120CAFI
12 in Stock. More available 05/08/2026 and 05/27/2026
$116.36/EA
Part #SQD QO270 70AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO270, Miniature Circuit Breaker, Standard, 120/240 VAC, 70 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box Lug C
MFG #QO270
10 in Stock. More available 05/27/2026
$112.21/EA
Part #SQD QO2125 125AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO2125, Standard Miniature Circuit Breaker, 120/240 VAC, 125 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph,
MFG #QO2125
Part #SQD QO120DF BRKR AFCI/GFCI 20A 1P 120V 10K Square Dâ„¢ QOâ„¢ Combination Miniature Circuit Breaker, Dual Function, 120 VAC, 20 A, 50/60 Hz, 10 kA Interrupt, Thermal Magnetic Trip, 1 Pole, 1 ph, Pressure Plate, 14 to 8 AW
MFG #QO120DF
21 in Stock. More available 05/27/2026
$149.09/EA
Part #SQD QO215 15AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO215, 2-Pole Miniature Circuit Breaker, Standard, 120/240 VAC, 15 A, 50/60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 2 Pole, 1
MFG #QO215
72 in Stock. More available 05/27/2026
$51.12/EA
Part #SQD QO340 40AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO340, Miniature Circuit Breaker, Standard, 240 VAC, 40 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Connectio
MFG #QO340
4 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QOT2020 20AMP/20AMP 1POLE 120VAC (2)20AMP 1POLE CIRCUIT BREAKERS FOR OLD STYLE LOADCENTERS Square Dâ„¢, QOT2020, Miniature Circuit Breaker, Tandem, 120/240 VAC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QOT Frame, K-Curve/Thermal
MFG #QOT2020
36 in Stock. More available 05/27/2026
$54.03/EA
Part #SQD QO360 60AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO360, 3-Pole Miniature Circuit Breaker, Standard, 240 VAC, 60 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Box Lug Co
MFG #QO360
7 in Stock. More available 05/27/2026
$170.39/EA
Part #SQD QO115DF BRKR AFCI/GFCI 15A 1P 120V 10K Square Dâ„¢ QOâ„¢ Combination Miniature Circuit Breaker, Dual Function, 120 VAC, 15 A, 50/60 Hz, 10 kA Interrupt, Thermal Magnetic Trip, 1 Pole, 1 ph, Pressure Plate, 14 to 8 AW
MFG #QO115DF
9 in Stock. More available 05/27/2026
$184.94/EA
Part #SQD QO330 30AMP 3POLE 240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO330, Miniature Circuit Breaker, Standard, 240 VAC, 30 A, 60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 3 Pole, 3 ph, Toggle Actuator, Pre
MFG #QO330
20 in Stock. More available 05/27/2026
$160.00/EA
Part #SQD QO2100 100AMP 2POLE 120/240VAC PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO2100, Miniature Circuit Breaker, Standard, 120/240 VAC, 100 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal/Magnetic Trip, 2 Pole, 1 ph, Box L
MFG #QO2100
71 in Stock. More available 05/27/2026
$132.99/EA





























