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

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

WEG -

Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	PL DWB160 3P	€34.47
A	PL DWB250	€37.66
A	BCAL-2 DWB	€84.84
A	BFR DWB 160 3P UL	€13.25
A	PC DWB250	€46.14
A	EHX ACW 400	€201.36	RFQ
A	AL ACW 125-800	€52.11
A	AL-1 DWB	€51.95	RFQ

EATON -

Type CV Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	CVH2225K	€3,435.33	RFQ
B	CVH3225KW	€3,741.22	RFQ
B	CVH3225KX	€3,759.58	RFQ
A	CVH2225KX	€3,418.50	RFQ
A	CVH2225KW	€3,400.14	RFQ
A	CVH2225KY	€3,418.50	RFQ
B	CVH3225K	€3,774.88	RFQ
B	CVH3225KY	€3,759.58	RFQ

EATON -

NGU-Type Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	NGU308035B20E	€53,622.52	RFQ
A	NGU308038B20ZGM	€66,557.29	RFQ
A	NGU308035B20M	€53,622.52	RFQ
A	NGU308036B20ZGE	€64,276.43	RFQ
A	NGU308036B22E	€53,857.99	RFQ
A	NGU308036B21ZGM	€64,688.47	RFQ
A	NGU308038B20ZGE	€66,557.29	RFQ
A	NGU308036B21ZGE	€64,688.47	RFQ
A	NGU308036ZGE	€62,510.59	RFQ
A	NGU308038B20E	€64,335.27	RFQ
A	NGU308038B20M	€64,335.27	RFQ
A	NGU308039B20ZGM	€76,387.13	RFQ
A	NGU308036B22ZGE	€56,271.29	RFQ
A	NGU308036B20E	€61,612.93	RFQ
A	NGU308039B20E	€74,150.37	RFQ
A	NGU308036ZGM	€62,510.59	RFQ
A	NGU308038ZGE	€64,776.74	RFQ
A	NGU308036B22ZGM	€56,271.29	RFQ
A	NGU308038E	€62,554.74	RFQ
A	NGU308039E	€72,399.26	RFQ
A	NGU308039B21ZGE	€76,784.44	RFQ
A	NGU308039B22ZGM	€65,144.63	RFQ
A	NGU308039M	€72,399.26	RFQ
A	NGU308039B22M	€65,144.63	RFQ
A	NGU308036B20M	€61,612.93	RFQ

EATON -

NGH-Type Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	NGH412036EC	€117,832.21	RFQ
A	NGH412036MC	€117,832.21	RFQ
A	NGH412032MC	€92,783.25	RFQ
A	NGH412035MC	€102,062.68	RFQ
A	NGH412035E	€92,783.25	RFQ
A	NGH412033EC	€82,214.60	RFQ
A	NGH412035EC	€102,062.68	RFQ
A	NGH412035M	€92,783.25	RFQ
A	NGH412036E	€107,125.17	RFQ
A	NGH708033EC	€60,706.11	RFQ
A	NGH412032EC	€92,783.25	RFQ
A	NGH708033MC	€60,706.11	RFQ
A	NGH712033EC	€82,214.60	RFQ
A	NGH712032EC	€92,794.23	RFQ
A	NGH708032EC	€73,411.76	RFQ
A	NGH908032EC	€73,407.38	RFQ
A	NGH908033MC	€60,706.11	RFQ
A	NGH908032MC	€73,407.38	RFQ
A	NGH412033MC	€82,214.60	RFQ
A	NGH408036M	€84,751.33	RFQ
A	NGH412036M	€107,125.17	RFQ
A	NGH408032MC	€73,411.76	RFQ
A	NGH708032MC	€73,411.76	RFQ
A	NGH712032MC	€92,794.23	RFQ
A	NGH712033MC	€82,214.60	RFQ

EATON -

Type CH Standard Circuit Breakers

Style	Model	Price (ex. VAT)
A	CH120HID	€125.08	RFQ
B	CH120HM	-	RFQ

EATON -

NGS-Type Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	NGS408032MC	€61,340.84	RFQ
A	NGS708033EC	€50,759.00	RFQ
A	NGS412036M	€92,739.33	RFQ
A	NGS708032MC	€61,340.84	RFQ
A	NGS708032EC	€61,340.84	RFQ
A	NGS708033MC	€50,759.00	RFQ
A	NGS712032EC	€84,136.38	RFQ
A	NGS712033MC	€70,150.24	RFQ
A	NGS712032MC	€84,136.38	RFQ
A	NGS412036MC	€106,850.64	RFQ
A	NGS908032EC	€61,364.98	RFQ
A	NGS908032MC	€61,364.98	RFQ
A	NGS912032MC	€77,562.80	RFQ
A	NGS908033EC	€50,756.79	RFQ
A	NGS908033MC	€50,756.79	RFQ
A	NGS912033MC	€68,744.60	RFQ
A	NGS912032EC	€77,562.80	RFQ
A	NGS412036EC	€106,850.64	RFQ
A	NGS412036E	€92,739.33	RFQ
A	NGS408035M	€61,340.84	RFQ
A	NGS408036MC	€77,903.22	RFQ
A	NGS408033EC	€50,759.00	RFQ
A	NGS408033MC	€50,759.00	RFQ
A	NGS408035EC	€67,481.72	RFQ
A	NGS408035MC	€67,481.72	RFQ

EATON -

G-Series Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	JG3125CT	€4,123.86	RFQ
B	JGX405035Z1	€27,251.84
B	JGU710032Z1	€6,457.16
B	JGU716032Z1	€6,457.16
B	JGU725032Z1	€6,457.16
B	JGU716033Z1	€8,387.71
B	JGU725033Z1	€8,387.71
B	JGX405032Z1	€21,794.01
B	JGX405036Z1	€20,146.79
B	JGX405033Z1	€18,807.03
B	JGX410033Z1	€18,741.14
B	JGU710033Z1	€8,387.71
B	JGX410036Z1	€20,146.79
B	JGX410032Z1	€20,695.86
B	JGX410035Z1	€27,251.84
B	JGX416032Z1	€20,695.86
B	JGX416033Z1	€18,741.14
B	JGX416035Z1	€29,645.83
B	JGX425033Z1	€18,741.14
B	JGX425032Z1	€20,695.86
B	JGX416036Z1	€21,464.57
B	JGU625033Z1	€26,625.91	RFQ
B	JGU705032Z1	€9,505.63
B	JGX425035Z1	€20,146.79
B	JGU425032Z1	€18,016.36

EATON -

E2 Mining Complete Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	E2F150TM	-	RFQ
B	E2FM150UM	€7,561.04	RFQ
C	E2LM3600MNW	€21,379.64	RFQ

EATON -

MDL-Frame Circuit Breakers

Style	Model	Price (ex. VAT)
A	MDL3600WA0505S0905	€31,813.59	RFQ
A	MDL3800VA05S01	€27,937.09	RFQ

EATON -

Navy And Marine Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	504C191G20	€33,196.35
A	504C191G24	€33,196.35
B	504C191G21	€33,196.35
B	504C191G18	€33,196.35
A	504C191G36	€26,321.44
A	504C191G26	€33,196.35
A	504C191G37	€26,321.44
B	504C191G19	€33,196.35

EATON -

Navy And Marine Complete Molded Case Circuit Breakers

Style	Model	Price (ex. VAT)
A	1230C83G06	€90,769.50	RFQ
B	5682D24G38	€14,573.46
B	5682D24G07	€12,834.70
B	5682D24G17	-	RFQ
B	5682D24G14	€13,955.75
B	5682D24G19	€12,834.70
B	5682D24G15	€13,955.75
B	5682D24G53	€12,834.70
B	5682D24G30	€16,026.23
B	5682D24G16	€13,955.75
B	5682D24G36	€14,573.46
B	5682D24G37	€14,573.46
B	5682D24G40	€14,573.46
B	5682D24G39	€14,573.46
B	5682D24G02	€13,955.75
C	5685D48G84	€56,083.76
D	5685D48G83	€46,213.31
D	5685D48G85	€33,380.48
E	58-5883	€817.87	RFQ
F	82E4228	€10,974.70
F	82E1737	€8,936.26
F	82E1844	€36,250.62
G	83E2441	€10,402.74
G	83E2558	€13,120.69
G	83E3554	€8,144.67

SIEMENS -

CJD Series Bolt-On Circuit Breakers

Style	Model	Amps	Price (ex. VAT)
A	CJD63B225	225A	-	RFQ
B	CJD63B250	250A	€9,194.42
B	CJD63B350	350A	€9,194.42
C	CJD63B400	400A	€9,194.42
D	CJD63S400A	400A	-	RFQ

GENERAL ELECTRIC -

THFK Series Molded Case Circuit Breakers, 3 Poles

Style	Model	Amps	Price (ex. VAT)
A	THFK236070WL	70A	-	RFQ
A	THFK236080WL	80A	-	RFQ
A	THFK236090WL	90A	€5,137.63	RFQ
A	THFK236100WL	100A	€5,137.63	RFQ
A	THFK236110WL	110A	-	RFQ
A	THFK236150WL	150A	-	RFQ
A	THFK236175WL	175A	-	RFQ
A	THFK236200WL	200A	-	RFQ
A	THFK236225WL	225A	-	RFQ
A	THFK236F000	225A	-	RFQ

GENERAL ELECTRIC -

THJK Series Molded Case Circuit Breakers, 3 Poles

Style	Model	Amps	Frame Type	Price (ex. VAT)
A	THJK436125WL	125A	TJK	-	RFQ
A	THJK436175WL	175A	TJK	-	RFQ
A	THJK436200WL	200A	TJK	€5,917.63	RFQ
A	THJK436225WL	225A	TJK	-	RFQ
B	THJK436250WL	250A	TJK	€5,917.63
A	THJK636250WL	250A	THJK	-	RFQ
A	THJK636300WL	300A	THJK	€3,492.73	RFQ
A	THJK436300WL	300A	TJK	€5,917.63	RFQ
A	THJK436350WL	350A	TJK	€5,917.63	RFQ
A	THJK436400WL	400A	TJK	€5,917.63	RFQ
A	THJK436F000	400A	TJK	€4,076.85	RFQ
A	THJK636400WL	400A	THJK	-	RFQ
A	THJK636450WL	450A	THJK	-	RFQ
A	THJK636500WL	500A	THJK	€6,673.50	RFQ
A	THJK636600WL	600A	THJK	€6,673.50	RFQ

SQUARE D -

PowerPacT B Molded Case Circuit Breakers

Style	Model	Amps	Number Of Poles	Price (ex. VAT)
A	BGA36015	15	3	€1,410.24
B	BGA260204	20	2	€1,250.66
C	BGA36020	20	3	€2,065.85
B	BGA260202	20	2	€1,250.66
B	BGA260201	20	2	€1,250.66
D	BGA36030	30	3	€1,997.19
B	BGA260301	30	2	€1,250.66
B	BGA260302	30	2	€1,250.66
B	BGA260304	30	2	-	RFQ
E	BGA36040	40	3	€1,998.09
B	BGA260401	40	2	€1,250.66
B	BGA260402	40	2	€1,250.66
B	BGA260404	40	2	€1,250.66
B	BGA260501	50	2	€1,250.66
B	BGA260502	50	2	€1,250.66
B	BGA260504	50	2	-	RFQ
A	BGA36050	50	3	€1,410.24
B	BGA260604	60	2	-	RFQ
A	BGA36060	60	3	€1,410.24
B	BGA260601	60	2	€1,631.70
B	BGA260602	60	2	€1,250.66
A	BGA36070	70	3	€1,538.90
A	BGA36080	80	3	€1,582.18
A	BGA36090	90	3	€1,582.18
B	BGA261004	100	2	-	RFQ

SQUARE D -

Thermal Magnetic Trip Circuit Breakers, Fixed Trip, Type LAL

Style	Model	Amps	Depth	Price (ex. VAT)
A	LAL36250	250	5.8"	€5,570.70
B	LAL36300	300	5.8"	€5,570.70
C	LAL36350	350	5.84"	€5,570.70
D	LAL36400	400	5.8"	€5,570.70

SQUARE D -

PowerPact H-Frame Unit-Mount Circuit Breakers

Style	Model	Amps	Current Rating	Depth	Frame Size	Frame Type	Height	Magnetic Hold Current	Magnetic Tripping Current	Price (ex. VAT)
A	HDL26015	15	15A	3.39"	60A/HD	-	6.42"	350A	750A	€964.46
B	HGL36040	40	40A	3.4"	60A/HG	-	6.4"	400A	850A	€1,115.40
C	HJL36040	40A	40A	-	-	HJL	-	400A	850A	€1,146.97
D	HDL36100	100	100A	3.39"	100A/HD	-	6.42"	900A	1700A	€1,250.66
D	HGL36100	100	100A	3.4"	100A/HG	-	6.4"	900A	1700A	€1,475.46
E	HJA36100	100A	100A	-	-	HJA	-	900A	1700A	€1,984.00

WEG -

Contact Blocks

Style	Model	Price (ex. VAT)
A	BC-1 DWB	€51.95
A	BC-2 DWB	€84.84

EATON -

G Series Molded Case Circuit Breakers, JG Frame

Style	Model	Aic Rating	Amps	Price (ex. VAT)
A	GJS9125AAM	-	-	€9,357.33
A	JGU325033W	-	-	€7,103.15
B	JGU3160AAG	-	-	-	RFQ
A	JGS316033W	-	-	-	RFQ
B	JGU3200FAG	-	-	€6,985.55
C	JGS3175FAGA1	-	-	-	RFQ
C	JGS3200AAG	-	-	€3,200.64
B	JGU3225FAGC	-	-	€7,333.63
A	JGS316036W	-	-	€4,053.96
B	JGU3225FAG	-	-	€6,985.55
C	JGS3160AAG	-	-	€3,311.58
A	JGU325032W	-	-	-	RFQ
A	JGS316036WC	-	-	€4,229.90
C	JGS3175FAGB2	-	-	€3,720.90
A	JGS316035WC	-	-	-	RFQ
C	JGS3225FAGA1	-	-	-	RFQ
C	JGS3200FAWZ1	-	-	-	RFQ
C	JGS3200FAGC	-	-	-	RFQ
C	JGS3175FAZ2	-	-	€2,740.59
C	JGS3175FAWZ2	-	-	-	RFQ
C	JGS3225FAWZ1	-	-	€3,122.55
C	JGS3200FAWZ2	-	-	-	RFQ
A	JGS325032W	-	-	€3,539.34
A	JGU325036W	-	-	€8,965.97
D	JGU405033G	-	-	€9,229.39

EATON -

E2N Type Mining Complete Molded Case Circuit Breakers

Style	Model
A	E2N310W	RFQ
A	E2N3800MWU66	RFQ
A	E2N3900WU66	RFQ
A	E2N3900W	RFQ
A	E2N3800WU66	RFQ
A	E2N3800WA06U66	RFQ
A	E2N3700W	RFQ
A	E2N3600WA06U18	RFQ
A	E2N3800MW	RFQ
A	E2N3800WS10	RFQ
A	E2N3800W	RFQ
A	E2N312WU66	RFQ
A	E2N3800MWA06U66	RFQ
A	E2N3600W	RFQ
A	E2N3500W	RFQ
A	E2N3800MWA06	RFQ
A	E2N312W	RFQ
A	E2N312MW	RFQ
A	E2N310WA13U66	RFQ
A	E2N310WU66	RFQ
A	E2N3800MWU18	RFQ
A	E2N3900WA13U66	RFQ

EATON -

E2NM Type Mining Complete Molded Case Circuit Breakers

Style	Model
A	E2NM310W	RFQ
A	E2NM312MWA13S10	RFQ
A	E2NM3800WA06U66	RFQ
A	E2NM3800WA06S10	RFQ
A	E2NM3800WU66	RFQ
A	E2NM310WU66	RFQ
A	E2NM312W	RFQ
A	E2NM3800MW	RFQ
A	E2NM3600WU66	RFQ
A	E2NM312MW	RFQ
A	E2NM3600WA06U66	RFQ
A	E2NM3800MWU66	RFQ
A	E2NM312MWU66	RFQ
A	E2NM312WU66	RFQ
A	E2NM3600WU18	RFQ
A	E2NM3600W	RFQ
A	E2NM3900WU66	RFQ

12...53 54

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.

Working Mechanism

Molded case circuit breaker's working mechanism includes following steps:

In the normal state, molded case circuit breakers allow electrical current to flow through the circuit uninterrupted.
When an overcurrent condition occurs, the MCCB's internal sensors detect the excess current flowing through the circuit.
They have two main trip mechanisms: electromagnetic trip and thermal trip.
The electromagnetic trip detects sudden, high-current surges, similar to short circuits, and quickly opens the circuit to cut power.
The thermal trip reacts to prolonged overloads by heating up, causing the MCCB to trip and disconnect the circuit.
Once the trip mechanism is activated, it triggers a mechanical release within the circuit breaker.
Hence, the breaker's contacts move quickly to the open position.
When the contacts are open, the MCCB interrupts the electrical flow, effectively cutting off power to the circuit.
The circuit remains in this disconnected state until manually reset by the user.

Features

General Electric Bolt-On Circuit Breakers:

These General Electric TEYH Series MCCBs have a thermal-magnetic, non-interchangeable trip unit to protect from severe power surges while avoiding tripping on mild overloads.
They also have a bolt-on mounting facility for convenience and compatibility with lug-lug / unit-mount applications.
These UL-listed breakers are available in single, two and three-pole configurations and accommodate universal 10 to 4 AWG size wires.

Square D PowerPacT Circuit Breakers :

These Square D MCCBs have a new front-facing and semi-transparent cover for easy access to accessories.
They have current ratings ranging from 15 to 125A and offer a maximum breaking capacity of 65kA at 480VAC.
These RoHS and REACH-compliant breakers feature dual-break rotating contacts that reduce peak current during a short circuit fault.

Eaton HKD Series Circuit Breakers :

Eaton HKD Series circuit breakers protect against overload and short circuit conditions in 480Y / 277V (three-phase, four-wire) distribution panels.
They have 2-pole construction and can serve two separate circuits or a complete single circuit when short-circuited.