How does a molded case circuit breaker differ from a circuit breaker?

While both molded case circuit breakers and conventional circuit breakers serve the same primary purpose of protecting electrical circuits, MCCBs are a specific type of circuit breaker with a molded case for added durability and protection.

Can MCCBs be reset after tripping?

Once the fault or overload is resolved, you can reset the MCCB to restore power to the circuit.

What is the difference between an MCCB and a miniature circuit breaker (MCB)?

Molded case circuit breakers are designed for higher current ratings and are used in industrial settings with heavy machinery, while MCBs are smaller and designed for residential or light commercial applications with lower current ratings.

Can MCCBs be used in three-phase electrical systems?

Yes, MCCBs are commonly used in three-phase systems. Brands like WEG, Siemens and ABB come in various configurations to suit single-phase or three-phase applications.

How do I select the right MCCB for my specific application?

Selecting the right MCCB involves considering factors such as the system's voltage, current rating, environmental conditions and specific protection requirements.

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Molded Case Circuit Breakers

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Molded case circuit breakers protect various electrical circuits and equipment from overcurrents and short circuits. These breakers consist of a molded case housing that encloses the circuit...Read more

EATON -

Molded Case Circuit Breaker, 225A Frame, 225A, 600 VAC/ 250 VDC, 3-Pole

Model	Item	Price (inc. VAT)
F3P-225	CV6TWH	£1,666.04	See Details

GLADIATOR -

Miniature Circuit Breaker, 50A, 240 VAC/ 125 VDC, 3-Pole, C Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3C-50	CV7FJW	£97.79	See Details

GLADIATOR -

Miniature Circuit Breaker, 6A, 480Y/ 277 VAC/ 125 VDC, 3-Pole, C Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3C-6	CV7FJX	£84.21	See Details

GLADIATOR -

Miniature Circuit Breaker, 63A, 240 VAC/ 125 VDC, 3-Pole, C Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3C-63	CV7FJY	£97.79	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 25A, 480 VAC/ 250 VDC, 3-Pole, Thermal Magnetic

Model	Item	Price (inc. VAT)
G3P-025	CV6TWN	£704.44	See Details

GLADIATOR -

Miniature Circuit Breaker, 15A, 480Y/ 277 VAC/ 125 VDC, 3-Pole, D Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3D-15	CV7FKC	£84.21	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 30A, 480 VAC/ 250 VDC, 3-Pole, Thermal Magnetic

Model	Item	Price (inc. VAT)
G3P-030-STAC	CV6TWR	£838.45	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 40A, 480 VAC/ 250 VDC, 3-Pole, Thermal Magnetic

Model	Item	Price (inc. VAT)
G3P-040	CV6TWV	£704.44	See Details

GLADIATOR -

Miniature Circuit Breaker, 4A, 480Y/ 277 VAC/ 125 VDC, 2-Pole, C Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-2C-4	CV7FGM	£56.14	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 60A, 480 VAC/ 250 VDC, 3-Pole, Thermal Magnetic

Model	Item	Price (inc. VAT)
G3P-060-STAC	CV6TWZ	£838.45	See Details

GLADIATOR -

Miniature Circuit Breaker, 4A, 480Y/ 277 VAC/ 125 VDC, 3-Pole, D Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3D-4	CV7FKL	£84.21	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 100A, 480 VAC/ 250 VDC, 3-Pole

Model	Item	Price (inc. VAT)
G3P-100-STAC	CV6TXH	£838.45	See Details

EATON -

Molded Case Circuit Breaker, 100A Frame, 100A, 480 VAC/ 250 VDC, 3-Pole

Model	Item	Price (inc. VAT)
G3P-100-UVAC	CV6TXK	£838.45	See Details

GLADIATOR -

Miniature Circuit Breaker, 63A, 240 VAC/ 125 VDC, 3-Pole, D Curve, Thermal Magnetic

Model	Item	Price (inc. VAT)
GMCBU-3D-63	CV7FKR	£97.79	See Details

EATON -

Molded Case Circuit Breaker, 400A Frame, 250A, 600 VAC/ 250 VDC, 3-Pole

Model	Item	Price (inc. VAT)
K3P-250-STDC	CV6TXP	£3,404.51	See Details

GLADIATOR -

Molded Case Circuit Breaker, 100A Frame, 20A, 600Y/ 480 VAC/ 250 VDC, 2-Pole

Model	Item	Price (inc. VAT)
GCB100S-2FF20LL	CV7TWH	£289.75	See Details

EATON -

Molded Case Circuit Breaker, 400A Frame, 250A, 600 VAC/ 250 VDC, 3-Pole

Model	Item	Price (inc. VAT)
K3P-250-UVDC	CV6TXR	£3,404.51	See Details

GLADIATOR -

Molded Case Circuit Breaker, 100A Frame, 50A, 600Y/ 480 VAC/ 250 VDC, 2-Pole

Model	Item	Price (inc. VAT)
GCB100S-2FF50LL	CV7TWM	£289.75	See Details

GLADIATOR -

Molded Case Circuit Breaker, 100A Frame, 60A, 600Y/ 480 VAC/ 250 VDC, 2-Pole

Model	Item	Price (inc. VAT)
GCB100S-2FF60LL	CV7TWN	£289.75	See Details

GLADIATOR -

Molded Case Circuit Breaker, 100A Frame, 25A, 600Y/ 480 VAC/ 500 VDC, 3-Pole

Model	Item	Price (inc. VAT)
GCB100S-3FF25LL	CV7TWW	£345.88	See Details

GLADIATOR -

Molded Case Circuit Breaker, 100A Frame, 30A, 600Y/ 480 VAC/ 500 VDC, 3-Pole

Model	Item	Price (inc. VAT)
GCB100S-3FF30LL	CV7TWX	£345.88	See Details

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Molded Case Circuit Breakers

Molded case circuit breakers are designed to prevent the flow of faulty power supplies into sensitive electrical equipment that may cause overloads and short circuits. With current ratings up to 1600A, these units are ideal for isolation applications in large PV systems. Raptor Supplies offers a wide range of these MCCBs from brands like ABB, Square D, Eaton, General Electric and Siemens. Square D circuit breakers come equipped with a thermal-magnetic trip unit which instantly opens under faulty currents and are capable of providing both time-delayed and instantaneous current limiting functions. These units feature an I-line type configuration at the ON end for facilitating bus connections in panelboards and lugs at the OFF end for cable connection. General Electric molded case circuit breakers feature a programmable electronic trip unit which accentuates the toggle when the current exceeds the predetermined value. These breakers come equipped with bolt-on type terminals for easy installation in reverse-feed applications. They are available in 2 and 3 pole options with a maximum voltage rating of 600VAC on Raptor Supplies.