1. Home / 
  2. All Categories / 
  3. Circuit Breaker / 
  4. Molded Case Circuit Breaker

Molded Case Circuit Breaker

For circuit breaker systems in commercial and industrial facilities, molded case circuit breakers are among the most widely used components for reliable overcurrent protection and electrical distribution. Molded case circuit breakers provide automatic circuit interruption during overload or short circuit conditions, protecting electrical systems and equipment from damage while enabling manual switching control. Electrical.com carries an extensive selection of molded case circuit breakers from all major manufacturers, including new, used, surplus, and re-certified options. These components are designed to meet the diverse needs of commercial buildings, manufacturing facilities, data centers, and industrial power distribution applications.
SORT BY
Part Number
PRICE
Manufacturer
Amperage
Voltage
J3B070
J3B070
In Stock
From
$27.91
Siemens
70
600
J3B090
J3B090
In Stock
From
$25.19
Siemens
90
600
J3B100
J3B100
In Stock
From
$565.57
Siemens
100
600
J3B125
J3B125
In Stock
From
$860.09
Siemens
125
600
J3B150
J3B150
In Stock
From
$648.20
Siemens
150
600
J3B175
J3B175
In Stock
From
$726.71
Siemens
175
600
J3B200
J3B200
In Stock
From
$865.60
Siemens
200
600
J3B225
J3B225
In Stock
From
$835.19
ITE
225
600
KL3B125
KL3B125
In Stock
From
$994.00
Siemens
125
600
KL3B225
KL3B225
In Stock
From
$784.12
Siemens
-
600
KL3B300
KL3B300
In Stock
From
$380.42
ITE
-
600
KL3B400
KL3B400
In Stock
From
$479.64
Siemens
-
600
MP115DFP
MP115DFP
In Stock
From
$116.46
Siemens
-
-
MP115GFAP
MP115GFAP
In Stock
From
$35.01
Siemens
-
-
NGG3B020LAESB
NGG3B020LAESB
In Stock
From
$3,264.32
Siemens
-
-
NGG3B020LBDSB
NGG3B020LBDSB
In Stock
From
$642.85
Siemens
-
-
NGG3B025LBDSB
NGG3B025LBDSB
In Stock
From
$2,354.59
Siemens
-
-
Q220AFCN
Q220AFCN
In Stock
From
$125.09
Siemens
-
-
QD3-B020
QD3-B020
In Stock
From
$30.56
Siemens
20
240
QF1B015
QF1B015
In Stock
From
$62.89
Siemens
15
120
SHND6A120LSIGH
SHND6A120LSIGH
In Stock
From
$18,644.55
Siemens
1200
600
SLD6B500LSIG
SLD6B500LSIG
In Stock
From
$5,292.24
Siemens
500
600
3VA1110-1AA36-0AA0
3VA1110-1AA36-0AA0
Limited Stock
From
Get Price
Siemens
-
-
3VA1110-4EE36-0AA0
3VA1110-4EE36-0AA0
Limited Stock
From
Get Price
Siemens
-
-
Popular Molded Case Circuit Breaker Manufacturers

Electrical.com stocks the largest inventory of molded case circuit breakers in the world, with over 1 million square feet of new, used, surplus, and re-certified MCCBs available for immediate shipment. From standard thermal-magnetic breakers to electronic trip units across all amperage ratings, we have what you need when others say no. Our comprehensive molded case circuit breaker inventory spans all voltage and current ratings, frame sizes, and interrupting capacities from all major manufacturers including current production and discontinued models from legacy suppliers. Available in new factory condition, surplus stock, and re-certified options‚ All backed by our standard 2-year Electrical.com warranty. Our molded case circuit breakers serve critical applications across commercial buildings, industrial facilities, manufacturing plants, data centers, healthcare facilities, distribution panels, motor control centers, switchboards, and power distribution systems.


Whether you're maintaining legacy equipment with obsolete MCCB models or sourcing current production breakers for new installations and retrofits, our 40+ warehouse locations across the US and Canada ensure rapid delivery to minimize your downtime. Need molded case circuit breakers now? Call 877-999-7077 or email [email protected]. With same-day shipping available and the right parts ready to ship from our nearest warehouse location, Electrical.com gets your operations back online fast. We can say yes when others have to say no.