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Square D Molded Case Circuit Breakers

Schneider Electric's Square D Molded Case Circuit Breakers (MCCBs) are famous for their performance and reliability. They are highly versatile, faring well in all sorts of electric protection schemes. Not every MCCB will be suitable for your specific application. However, ample choices within the Square D line of molded-case circuit breakers should allow you to find a solution that fits the bill.

An extensive series of frame sizes, amperage ratings, and trip unit options make Square D MCCBs suitable for use in varied applications, typical of residential, commercial, and industrial control panels across North American installations. The PowerPact series, which consists of the following frame sizes, is the flagship of the Square D MCCB line: H, J, L, M, and P. Each series was designed with a specific performance and compatibility window in mind and is available with a variety of options to meet the demands of any job or application.

Found 3174 items
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Found 3174 items
Component
Enclosed Circuit Breaker (1)
Molded Case Circuit Breaker (2880)
Motor Circuit Breaker (1)
Motor Circuit Protector (5)
Residual Current Breaker (1)
Manufacturer
Schneider Electric (3174)
Square D (3174)
Amperage (Molded Case Breaker)
100 Amp (227)
1000 Amp (50)
110 Amp (81)
1200 Amp (69)
125 Amp (153)
15 Amp (124)
150 Amp (188)
1600 Amp (21)
175 Amp (74)
20 Amp (132)
Frame Type (Molded Case Breaker)
B Frame (623)
H Frame (564)
J Frame (242)
L Frame (124)
LA Frame (40)
LH Frame (15)
M Frame (57)
P Frame (138)
Q Frame (282)
R Frame (44)
Interrupt Code (Molded Case Breaker)
B Interrupt Rating (84)
D Interrupt Rating (639)
G Interrupt Rating (709)
J Interrupt Rating (500)
K Interrupt Rating (8)
L Interrupt Rating (109)
R Interrupt Rating (15)
Interrupt Rating (Molded Case Breaker)
10 Ka (21)
10 Ka 125 Volt (38)
10 Ka 240 Volt (84)
10 Ka 250 Volt (93)
10 Ka 600/347 Volt (57)
10 Ka 600Y/347 Volt (26)
100 Ka (101)
100 Ka 208Y/120 Volt (47)
100 Ka 240 Volt (499)
100 Ka 480 Volt (104)
Maximum Voltage (Molded Case Breaker)
120 VAC (22)
125 VDC (30)
208 VAC (9)
240 VAC (652)
240 VDC (10)
250 VDC (707)
277 VAC (4)
347 VAC (6)
415 VAC (2)
480 VAC (123)
Mounting (Molded Case Breaker)
Busbar (52)
DIN Rail (362)
I-Line (841)
Plug-In (1)
Unit Mount (922)
Number of Jaws
13 (1)
4 (24)
4 Without Jaw Release (6)
5 (5)
7 (2)
Number of Meter Sockets
2 (1)
3 (1)
4 (1)
6 (1)
Number of Spaces
10 (1)
12 (5)
16 (5)
20 (12)
3 (1)
30 (12)
4 (12)
42 (6)
54 (3)
60 (1)
Phase
Single Phase (61)
Three Phase (6)
Poles (Molded Case Breaker)
Single Pole (243)
Two Pole (823)
Three Pole (1906)
Four Pole (146)
UL Listing (Molded Case Breaker)
UL 489 (1782)
Normally In Stock
Schneider Electric QBL22150 Square D Breaker Q Frame 150 Amp Two Pole
Free U.S Ground shipping
$533.60
$444.67
Normally In Stock
Schneider Electric QBM22200TN Square D Breaker Q Frame 200 Amp Two Pole
Free U.S Ground shipping
$630.70
$525.58
Normally In Stock
Schneider Electric HJL26020 Square D Breaker H Frame 20 Amp Two Pole
Free U.S Ground shipping
$2038.21
$1698.51
Normally In Stock
Schneider BGL26125 Square D Breaker B Frame 125 Amp Two Pole
Free U.S Ground shipping
$1958.81
$1632.34
Normally In Stock
Schneider BJL36090 Square D Breaker B Frame 90 Amp Three Pole
Free U.S Ground shipping
$2220.79
$1850.66
Normally In Stock
Schneider BJL36100 Square D Breaker B Frame 100 Amp Three Pole
Free U.S Ground shipping
$2220.79
$1850.66
Normally In Stock
Schneider Electric QDL22200 Square D Breaker Q Frame 200 Amp Two Pole
Free U.S Ground shipping
$702.97
$585.81
Normally In Stock
Schneider Electric LDL36400U31X L Frame Square D Breaker 400 Amp Three Pole
Free U.S Ground shipping
$6310.75
$5258.96
Normally In Stock
Schneider BJF36060 Square D Breaker B Frame 60 Amp Three Pole
Free U.S Ground shipping
$2562.11
$2135.09
Normally In Stock
Schneider Electric HGL36150T Square D Breaker H Frame 150 Amp Three Pole
Free U.S Ground shipping
$7057.92
$5881.60
Normally In Stock
Schneider Electric HLL36150M74 Square D Breaker H Frame 150 Amp Three Pole
Free U.S Ground shipping
$3014.83
$2512.36
Normally In Stock
Schneider Electric QDL22150 Square D Breaker Q Frame 150 Amp Two Pole
Free U.S Ground shipping
$911.75
$759.79
Normally In Stock
Schneider Electric QBM22150TN Square D Breaker Q Frame 150 Amp Two Pole
Free U.S Ground shipping
$653.39
$544.49

More Information about Square D Molded Circuit Breakers

These circuit breakers incorporate trip units that are both electronic and thermal-magnetic. The thermal-magnetic trip unit combines two types of protective technologies: It provides thermal protection against current overloads and short circuits and uses "magnetic latching" to rapidly open the contacts when its magnetic trip threshold is exceeded. The thermal-magnetic circuit breaker offers standardized protection that is robust and reliable. The electronic trip unit is more commonly found in molded-case circuit breakers but is also available in power circuit breakers. It can be configured to offer the levels of reliable protection associated with thermal-magnetic trip units. The MCCBs come in 1-pole, 2-pole, 3-pole and 4-pole designs.

What is a Circuit Breaker?

There are two different types of technologies that are commonly used in circuit breakers. 

Magnetic Breakers

Magnetic Breakers are designed to react to short circuits or sharp spikes in voltage and current. The more current that passes through the breaker’s electromagnet, the stronger the magnet becomes. When the current exceeds the rating for that particular breaker, the magnetic force becomes strong enough that it will pull the contact back and disconnect it from the other contact, disconnecting power from the device.

Thermal Protection Breakers

Thermal Protection Breakers protect against a sustained overcurrent, or a higher current, for a longer period of time. Thermal protection uses a Bimetal strip that will bend the contacts away from each other to disconnect power. Thermal Magnetic Breakers are the most common type of circuit breakers. They combine magnetic technology to protect against short circuits or sharp spikes and thermal technology that protects against sustained overcurrent for a long period of time.