Molded Case Circuit Breakers
Molded case circuit breakers (MCCBs) provide overcurrent and short circuit protection for electrical systems in residential, commercial, and industrial settings. They are designed and tested for use in a variety of applications where reliable and safe operation under conditions of fault or excessive current flow is essential for electrical system integrity. With their robust molded case design, MCCBs are highly durable and capable of withstanding the demands of a wide range of applications—everything from branch circuit protection in a home to high-capacity circuits in an industrial environment.
MCCBs usually have thermal-magnetic mechanisms or electronic trip units for exact and effective protection. Thermal-magnetic MCCBs employ thermal overload protection elements and magnetic elements for short-circuit protection. These basic mechanisms still provide the kinds of versatile, dependable, and multipurpose features that make MCCBs suitable for a range of uses.
ABB Molded Case Circuit Breakers
Benshaw Molded Case Circuit Breakers
Eaton Molded Case Circuit Breakers
IDEC Molded Case Circuit Breakers
Lovato Molded Case Circuit Breakers
Square D Molded Case Circuit BreakersFound 77704 items
Filters
Found 77704 items
Manufacturer
ABB (8900)
Adalet (55)
Benshaw (95)
Eaton (64639)
IDEC (809)
Killark (10)
Lovato (51)
Schneider Electric (3145)
Square D (3145)
Component
Disconnect Enclosure (20)
AFCI Circuit Breaker (1)
Air Circuit Breaker (3475)
Air Circuit Breaker Switch (217)
Circuit Breaker Enclosure (49)
Direct Current Circuit Breaker (435)
Electronic Molded Case Circuit Breaker (2334)
Enclosed Circuit Breaker (29)
Engine Generator Molded Case Circuit Breaker (39)
Frame Only (284)
Breaker Amperage Rating
0.5 Amp (2)
1 Amp (4)
1.5 Amp (1)
1.6 Amp (14)
10 Amp (58)
100 Amp (334)
1000 Amp (518)
110 Amp (51)
1200 Amp (426)
125 Amp (178)
Breaker Number of Poles
Four Pole (3579)
Single Pole (260)
Six Pole (4)
Three Pole (4571)
Two Pole (349)
Amperage (Molded Case Breaker)
0.16 Amp (3)
0.25 Amp (3)
0.3 Amp (14)
0.4 Amp (3)
0.5 Amp (36)
0.63 Amp (3)
0.75 Amp (15)
1 Amp (61)
1.5 Amp (2)
1.6 Amp (3)
Enclosure Height
11" (15)
13" (11)
18" (9)
20" (5)
24" (5)
36" (6)
Enclosure Width
12" (16)
6" (26)
7" (9)
Frame Type (Molded Case Breaker)
1 Frame (770)
100F (45)
1200A Frame (2)
1200F (25)
125A Frame (3)
150F (9)
2 Frame (12723)
225A Frame (3)
250F (7)
3 Frame (30421)
Interrupt Rating (Molded Case Breaker)
1.5 Ka (8)
10 Ka (264)
10 Ka 1000Y/577 Volt (10)
10 Ka 1200 Volt (23)
10 Ka 125 Volt (38)
10 Ka 240 Volt (84)
10 Ka 250 Volt (326)
10 Ka 250 Volt (DC) (15)
10 Ka 400 Volt (2)
10 Ka 577 Volt (92)
Enclosure Depth
5" (40)
6" (5)
8" (6)
Interrupt Code (Molded Case Breaker)
B Interrupt Rating (84)
D Interrupt Rating (768)
G Interrupt Rating (773)
J Interrupt Rating (500)
K Interrupt Rating (8)
L Interrupt Rating (109)
R Interrupt Rating (15)
Maximum Voltage (Molded Case Breaker)
1000 VAC (17)
1000 VDC (43)
1000Y/577 VAC (16)
1000Y/577 VAC/250 VDC (2)
110 VAC (1)
115 VAC (1)
120 VAC (258)
120/240 VAC (1)
1200 VAC (23)
125 VAC (26)
Enclosure NEMA Rating
NEMA Type 4X (55)
NEMA Type 7 (55)
NEMA Type 9 (55)
Poles (Molded Case Breaker)
Single Pole (1676)
Two Pole (6683)
Three Pole (34268)
Four Pole (25605)
One Pole (96)
Enclosure Composition
Aluminum Alloy (55)
Breaker Voltage Rating
1000 VAC (2)
1000 VDC (2)
1150 VAC (1)
120 VAC (212)
120/240 VAC (237)
1200 VDC (1)
125 VDC (189)
208Y/120 VAC (11)
230 VAC (62)
240 VAC (457)
Communications
CAM Link (2855)
Modbus RTU (8681)
Modbus RTU And CAM Link (5848)
Modbus/Relay (1)
Relays (704)
Relays And ZSI (687)
Zone Selective Interlock (66)
Interrupt Rating
10 Ka (40)
10 Ka 125 Volt (DC) (5)
10 Ka 240 Volt (5)
10 Ka 250 Volt (DC) (38)
10 Ka 375 Volt (DC) (13)
10 Ka 480Y/277 Volt (24)
10 Ka 500 Volt (DC) (5)
100 Ka (707)
100 Ka 240 Volt (38)
100 Ka 250 Volt (DC) (9)
Mounting (Molded Case Breaker)
Busbar (52)
DIN Rail (555)
I-Line (841)
Panel (2237)
Panel Mount (675)
Plug-In (1)
Unit Mount (922)
Number of Jaws
13 (1)
4 (17)
4 Without Jaw Release (5)
5 (3)
7 (1)
Number of Meter Sockets
2 (1)
3 (1)
4 (1)
6 (1)
Number of Spaces
12 (6)
30 (2)
4 (1)
42 (1)
8 (20)
Phase
Single Phase (24)
Three Phase (4)
Trip Unit (Molded Case Breaker)
Ekip DIP E-LSIG (12)
Ekip DIP LIG (108)
Ekip DIP LS/I (137)
Ekip DIP LSI (128)
Ekip DIP LSIG (128)
Ekip DIP M-I (17)
Ekip G DIP LS/I (105)
Ekip G Hi-Touch LSIG (100)
Ekip G Touch LSIG (102)
Ekip Hi-Touch LSI (171)
Trip Unit Type
310+ (1)
310+ Electronic LSG (1)
310+ Electronic LSI (4)
Adjustable Magnetic (7)
Adjustable Thermal (6)
Common (1)
Electronic ALSI (30)
Electronic ALSIG (32)
Electronic LI (5)
Electronic LIG (4)
UL Listing (Molded Case Breaker)
Ekip DIP LS/I (15)
Ekip DIP LSI (1)
Ekip DIP LSIG (2)
Ekip DIP M-I (2)
IEC (4)
MA (6)
MCS (2)
TMA (15)
TMF (30)
UL (89)
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Free U.S Ground shipping
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Free U.S Ground shipping
$22304.53
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Free U.S Ground shipping
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Free U.S Ground shipping
$21384.66
$17820.55
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Eaton NGK3080KSEW02 - Series G Molded Case Switch, 80 Amp, Three Pole, 480 VAC, 125/250 VDC
Free U.S Ground shipping
$25660.00
$21383.33
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Eaton NGK3080KSE - Series G Molded Case Switch, 80 Amp, Three Pole, 480 VAC, 125/250 VDC
Free U.S Ground shipping
$21384.66
$17820.55
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Eaton RGK320WK - Series G Molded Case Switch, 2000 Amp, Three Pole
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Free U.S Ground shipping
$41620.21
$34683.51
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Free U.S Ground shipping
$41570.03
$34641.69
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Eaton RGK316WK - Series G Molded Case Switch, 1600 Amp, Three Pole
$40817.33
$34014.44
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Eaton RGK3160KSE - Series G Molded Case Switch, 1600 Amp, Three Pole
Free U.S Ground shipping
$40817.33
$34014.44
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Eaton GJK3250KSWZ1 - Series G Molded Case Switch, 250 Amp, Three Pole, 600 VAC
Free U.S Ground shipping
$2403.86
$2003.22
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Free U.S Ground shipping
$31082.94
$25902.45
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Free U.S Ground shipping
$31082.94
$25902.45
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Eaton NGK312KSW - Series G Molded Case Switch, 1200 Amp, Three Pole, 480 VAC
Free U.S Ground shipping
$31082.94
$25902.45
Normally In Stock
Eaton NGK3120KSM - Series G Molded Case Switch, 1200 Amp, Three Pole, 480 VAC
Free U.S Ground shipping
$31082.94
$25902.45
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Eaton NGK3120KSE - Series G Molded Case Switch, 1200 Amp, Three Pole, 480 VAC
Free U.S Ground shipping
$31082.94
$25902.45
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Free U.S Ground shipping
$37297.91
$31081.59
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Eaton RGK420WK - Series G Molded Case Switch, 2000 Amp, Four Pole
Free U.S Ground shipping
$66451.84
$55376.53
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Eaton RGK4200KSE - Series G Molded Case Switch, 2000 Amp, Four Pole
Free U.S Ground shipping
$66451.84
$55376.53
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Eaton RGK416WK - Series G Molded Case Switch, 1600 Amp, Four Pole
Free U.S Ground shipping
$65269.02
$54390.85
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Free U.S Ground shipping
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Free U.S Ground shipping
$23485.97
$19571.64
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Eaton NGK4800KSW - Series G Molded Case Switch, 800 Amp, Four Pole, 480 VAC
Free U.S Ground shipping
$31955.78
$26629.82
Normally In Stock
Eaton NGK4080KSEW03 - Series G Molded Case Switch, 80 Amp, Four Pole, 480 VAC, 250 VDC
Free U.S Ground shipping
$38340.46
$31950.38
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Eaton NGK4080KSE - Series G Molded Case Switch, 80 Amp, Four Pole, 480 VAC, 250 VDC
Free U.S Ground shipping
$31955.78
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Free U.S Ground shipping
$46810.28
$39008.57
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Free U.S Ground shipping
$46810.28
$39008.57
Normally In Stock
Eaton NGK4120KSE - Series G Molded Case Switch, 1200 Amp, Four Pole, 480 VAC
Free U.S Ground shipping
$46810.28
$39008.57
Normally In Stock
Eaton NGK4120KSEW03 - Series G Molded Case Switch, 120 Amp, Four Pole, 480 VAC, 250 VDC
Free U.S Ground shipping
$56169.11
$46807.59
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Eaton LGS363039WC - Series G Molded Case Circuit Breaker, 630 Amp
Free U.S Ground shipping
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$12838.00
Normally In Stock
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Free U.S Ground shipping
$15456.85
$12880.71
Normally In Stock
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Free U.S Ground shipping
$12108.37
$10090.31
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Eaton LGS363038GC - Series G Molded Case Circuit Breaker, 630 Amp
Free U.S Ground shipping
$12163.88
$10136.57
Normally In Stock
Eaton LGS360039WC - Series G Molded Case Circuit Breaker, 600 Amp
Free U.S Ground shipping
$14782.03
$12318.36
Normally In Stock
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Free U.S Ground shipping
$14833.28
$12361.07
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Free U.S Ground shipping
$11719.69
$9766.41
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Eaton LGS360038GC - Series G Molded Case Circuit Breaker, 600 Amp
Free U.S Ground shipping
$11762.41
$9802.01
Normally In Stock
Eaton LGS340039WC - Series G Molded Case Circuit Breaker, 400 Amp
Free U.S Ground shipping
$10989.35
$9157.79
Normally In Stock
Eaton LGS340039GC - Series G Molded Case Circuit Breaker, 400 Amp
Free U.S Ground shipping
$11032.06
$9193.38
Normally In Stock
Eaton LGS340038WC - Series G Molded Case Circuit Breaker, 400 Amp
Free U.S Ground shipping
$9071.66
$7559.72
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Free U.S Ground shipping
$9114.38
$7595.32
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Eaton LGS325039WC - Series G Molded Case Circuit Breaker, 250 Amp
Free U.S Ground shipping
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$9157.79
Normally In Stock
Eaton LGS325039GC - Series G Molded Case Circuit Breaker, 250 Amp
Free U.S Ground shipping
$11032.06
$9193.38
More Information about Molded Case Circuit Breakers
One of the principal benefits of molded case circuit breakers is their competence in managing overcurrent protection while sustaining dependable performance and ensuring safety. With a complete range of ratings and frame sizes, MCCBs are well suited to circuits of all sorts and with all kinds of current capacities and demands.
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.