QO Plug-in Series
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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
153 in Stock. More available 12/28/2025
$116.36 per EA (1) / 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
239 in Stock. More available 12/09/2025 and 12/28/2025
$51.12 per EA (1) / 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
472 in Stock. More available 12/28/2025
$21.20 per EA (1) / 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
49 in Stock. More available 12/28/2025
$132.99 per EA (1) / 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
124 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
216 in Stock. More available 12/28/2025
$19.95 per EA (1) / 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
75 in Stock. More available 12/11/2025 and 12/28/2025
$51.12 per EA (1) / 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
64 in Stock. More available 12/28/2025
$141.30 per EA (1) / 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
183 in Stock. More available 12/11/2025 and 12/28/2025
$51.12 per EA (1) / 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
103 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
106 in Stock. More available 12/28/2025
$116.36 per EA (1) / EA
Part #SQD QO115CAFI 15AMP 1POLE 120VAC COMBINATION ARC FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115CAFI, Arc Fault Circuit Breaker, 120 VAC, 15 A, 60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 1 Pole,
MFG #QO115CAFI
11 in Stock. More available 12/10/2025 and 12/28/2025
$123.64 per EA (1) / 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
107 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
5 in Stock. More available 12/10/2025 and 12/28/2025
$116.36 per EA (1) / 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 12/28/2025
$116.36 per EA (1) / 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
1 in Stock. More available 12/28/2025
$232.73 per EA (1) / EA
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
20 in Stock. More available 12/28/2025
$137.14 per EA (1) / 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
10 in Stock. More available 12/28/2025
$128.83 per EA (1) / 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
45 in Stock. More available 12/28/2025
$55.27 per EA (1) / 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
11 in Stock. More available 12/28/2025
$160.00 per EA (1) / 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
5 in Stock. More available 12/28/2025
$160.00 per EA (1) / 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 12/28/2025
$54.03 per EA (1) / 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
10 in Stock. More available 12/28/2025
$170.39 per EA (1) / 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
12 in Stock. More available 12/28/2025
$184.94 per EA (1) / 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
153 in Stock. More available 12/28/2025
$116.36 per EA (1) / 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
239 in Stock. More available 12/09/2025 and 12/28/2025
$51.12 per EA (1) / 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
472 in Stock. More available 12/28/2025
$21.20 per EA (1) / 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
49 in Stock. More available 12/28/2025
$132.99 per EA (1) / 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
124 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
216 in Stock. More available 12/28/2025
$19.95 per EA (1) / 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
75 in Stock. More available 12/11/2025 and 12/28/2025
$51.12 per EA (1) / 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
64 in Stock. More available 12/28/2025
$141.30 per EA (1) / 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
183 in Stock. More available 12/11/2025 and 12/28/2025
$51.12 per EA (1) / 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
103 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
106 in Stock. More available 12/28/2025
$116.36 per EA (1) / EA
Part #SQD QO115CAFI 15AMP 1POLE 120VAC COMBINATION ARC FAULT PLUG-IN CIRCUIT BREAKER QO STYLE Square Dâ„¢, QO115CAFI, Arc Fault Circuit Breaker, 120 VAC, 15 A, 60 Hz Frequency, 10 kA Interrupt, QO/100 A Frame, Thermal/Magnetic Trip, 1 Pole,
MFG #QO115CAFI
11 in Stock. More available 12/10/2025 and 12/28/2025
$123.64 per EA (1) / 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
107 in Stock. More available 12/09/2025 and 12/28/2025
$53.20 per EA (1) / 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
5 in Stock. More available 12/10/2025 and 12/28/2025
$116.36 per EA (1) / 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 12/28/2025
$116.36 per EA (1) / 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
1 in Stock. More available 12/28/2025
$232.73 per EA (1) / EA
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
20 in Stock. More available 12/28/2025
$137.14 per EA (1) / 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
10 in Stock. More available 12/28/2025
$128.83 per EA (1) / 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
45 in Stock. More available 12/28/2025
$55.27 per EA (1) / 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
11 in Stock. More available 12/28/2025
$160.00 per EA (1) / 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
5 in Stock. More available 12/28/2025
$160.00 per EA (1) / 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 12/28/2025
$54.03 per EA (1) / 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
10 in Stock. More available 12/28/2025
$170.39 per EA (1) / 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
12 in Stock. More available 12/28/2025
$184.94 per EA (1) / EA




























