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.

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

GENERAL ELECTRIC -

TECL Frame Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	TECL36030	30	-	RFQ
A	TECL36100	100	A$ 2281.56	RFQ

SQUARE D -

JJP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	JJP36200	200	A$ 6619.96
A	JJP36250	250	A$ 7161.29

SQUARE D -

FCP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	FCP34060	60	A$ 2953.63	RFQ
A	FCP34090	90	A$ 3273.20	RFQ
A	FCP34100	100	-	RFQ

SIEMENS -

LGB Series, Bolt On Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	LGB3B015B	15	3	480V	A$ 1092.31
B	LGB2B025B	25	2	480V	A$ 863.63
C	LGB1B030B	30	1	277V	A$ 479.57
B	LGB2B035B	35	2	480V	-	RFQ
C	LGB1B040B	40	1	277V	A$ 514.40
A	LGB3B045B	45	3	480V	A$ 1318.84
C	LGB1B050B	50	1	277V	A$ 514.40
C	LGB1B060B	60	1	277V	A$ 514.40
A	LGB3B070B	70	3	480V	A$ 1148.37
A	LGB3B080B	80	3	480V	A$ 1148.37
A	LGB3B100B	100	3	480V	A$ 1148.37
A	LGB3B110B	110	3	480V	A$ 2142.02

SQUARE D -

LGL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LGL36400U31X	400	A$ 10320.61
A	LGL36400U33X	400	A$ 10956.60
A	LGL36400U44X	400	A$ 14738.97
A	LGL36000S40X	400	-	RFQ
A	LGL36600U31X	600	A$ 10560.00
A	LGL36000S60X	600	-	RFQ
A	LGL36600U33X	6600	A$ 10560.00

SQUARE D -

BDA Series, Circuit Breaker

Style	Model	Ac Voltage Rating	Amps	Number Of Poles	Price (inc. GST)
A	BDA260201	-	20	2	A$ 1526.02
B	BDA36110	-	110	3	A$ 2953.63
A	BDA260901	-	90	2	-	RFQ
A	BDA260801	-	80	2	A$ 1631.75
B	BDA34110Y	-	110	3	A$ 2527.52
A	BDA260702	-	70	2	A$ 1631.75
A	BDA260701	-	70	2	A$ 1631.75
A	BDA260204	-	20	2	A$ 1526.02
A	BDA260152	-	15	2	A$ 1526.02
A	BDA260504	-	50	2	-	RFQ
A	BDA260402	-	40	2	A$ 1526.02
B	BDA34125Y	-	125	3	A$ 2953.63
A	BDA36125	-	125	3	A$ 2750.60
A	BDA261002	-	100	2	A$ 1776.95
A	BDA261001	-	100	2	A$ 1776.95
A	BDA260802	-	80	2	A$ 1631.75
B	BDA34015Y	-	15	3	A$ 1776.95
B	BDA34090Y	-	90	3	A$ 2073.76
B	BDA34070Y	-	70	3	A$ 2073.76
A	BDA260302	-	30	2	A$ 1526.02
A	BDA260301	-	30	2	A$ 1526.02
A	BDA260202	-	20	2	A$ 1526.02
A	BDA260904	-	90	2	-	RFQ
A	BDA36035	-	35	3	A$ 2194.69
A	BDA260804	-	80	2	-	RFQ

SQUARE D -

BGA Series, Circuit Breaker

Style	Model	Amps	Voltage	Price (inc. GST)
A	BGA34015Y	15	480	A$ 3114.29
A	BGA34020Y	20	480	A$ 3114.29
A	BGA34025Y	25	480	A$ 2368.30
A	BGA34030Y	30	480	A$ 2412.78
A	BGA34040Y	40	480	A$ 3114.29
A	BGA34050Y	50	480	-	RFQ
A	BGA34060Y	60	480	A$ 3114.29
A	BGA34070Y	70	480	A$ 2817.72
A	BGA34080Y	80	480	A$ 2887.36
A	BGA34090Y	90	480	A$ 3388.35
A	BGA34100Y	100	480	A$ 3388.35
A	BGA36110	110	600	A$ 3388.35
A	BGA34125Y	125	480	A$ 4632.17
A	BGA36125	125	600	A$ 3087.64

SQUARE D -

BGL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	BGL36015	15	A$ 2402.75
A	BGL36020	20	A$ 2402.75
A	BGL36030	30	A$ 2402.75
A	BGL36040	40	A$ 2402.75
A	BGL36050	50	A$ 2402.75
A	BGL36060	60	A$ 2402.75
A	BGL36070	70	A$ 2926.10
A	BGL36080	80	A$ 2926.10
A	BGL36090	90	A$ 2926.10
A	BGL36100	100	A$ 2926.10
A	BGL36125	125	A$ 4630.13

SQUARE D -

BJA Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	BJA260151	15	2	A$ 3701.36
A	BJA260154	15	2	-	RFQ
A	BJA260152	15	2	A$ 2244.48	RFQ
A	BJA36015	15	3	A$ 2607.41
A	BJA260204	20	2	A$ 2244.48
A	BJA36020	20	3	A$ 2607.41
A	BJA260201	20	2	A$ 3493.99
A	BJA260202	20	2	A$ 2244.48	RFQ
A	BJA36025	25	3	A$ 2926.10
A	BJA36030	30	3	A$ 2607.41
A	BJA260301	30	2	A$ 2244.48
A	BJA260302	30	2	A$ 2244.48	RFQ
A	BJA260304	30	2	-	RFQ
A	BJA36035	35	3	A$ 2926.10
A	BJA36040	40	3	A$ 2607.41
A	BJA260402	40	2	A$ 2244.48	RFQ
A	BJA260401	40	2	A$ 2244.48
A	BJA260404	40	2	A$ 2244.48
A	BJA36050	50	3	A$ 2607.41
A	BJA260502	50	2	A$ 2244.48	RFQ
A	BJA260504	50	2	-	RFQ
A	BJA260501	50	2	-	RFQ
A	BJA36060	60	3	A$ 2607.41
A	BJA260604	60	2	-	RFQ
A	BJA260601	60	2	A$ 2364.79

SQUARE D -

BJL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	BJL36015	15	A$ 2953.63
A	BJL36020	20	A$ 3288.38
A	BJL36030	30	A$ 2953.63
A	BJL36040	40	A$ 2953.63
A	BJL36050	50	A$ 2953.63
A	BJL36060	60	A$ 2953.63
A	BJL36070	70	A$ 3773.04
A	BJL36080	80	A$ 3773.04
A	BJL36090	90	A$ 3773.04
A	BJL36100	100	A$ 3773.04
A	BJL36125	125	A$ 4392.56

SQUARE D -

FA Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	FA36015-2100	15	3	600	-	RFQ
B	FA26015BC	15	2	600	A$ 1526.02	RFQ
B	FA24015BC	15	2	480	A$ 1566.12	RFQ
B	FA24015AC	15	2	480	A$ 1566.12	RFQ
B	FA24015AB	15	2	480	A$ 1566.12	RFQ
B	FA22015AB	15	2	240	A$ 1068.55	RFQ
C	FA32015	15	3	240	A$ 1237.00	RFQ
B	FA22015AC	15	2	240	A$ 1068.55	RFQ
C	FA3601535	15	3	600	A$ 2211.04	RFQ
B	FA26015AC	15	2	600	A$ 1526.02
D	FA14015B	15	1	277	-	RFQ
B	FA22015BC	15	2	240	A$ 1068.55	RFQ
A	FA36015-1021	15	3	600	A$ 2953.63
A	FA34015-1021	15	3	480	A$ 2692.15	RFQ
D	FA14015C	15	1	277	-	RFQ
D	FA14015A	15	1	277	-	RFQ
B	FA26015AB	15	2	600	-	RFQ
C	FA36020-1021	20	3	600	A$ 2964.44	RFQ
B	FA24020AC	20	2	480	A$ 1566.12	RFQ
B	FA24020BC	20	2	480	-	RFQ
E	FA34020-1021	20	3	480	A$ 2692.15	RFQ
B	FA26020BC	20	2	600	A$ 1526.02	RFQ
C	FA36020G35	20	3	600	A$ 2211.04	RFQ
B	FA22020AB	20	2	240	A$ 1068.55	RFQ
B	FA22020AC	20	2	240	A$ 1068.55	RFQ

SQUARE D -

FAL Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	FAL34070-1021	-	-	-	A$ 2073.76	RFQ
A	FAL34070-1380	-	-	-	-	RFQ
B	FAL22000	-	2	240	-	RFQ
C	FAL14015	15	1	277	A$ 396.48
A	FAL34020-1212	20	3	480	A$ 1631.75	RFQ
A	FAL34020-1021	20	3	480	-	RFQ
A	FAL36020-1021	20	3	600	A$ 2615.84	RFQ
B	FAL26020	20	2	600	A$ 1144.48
A	FAL34025-1212	25	3	480	-	RFQ
C	FAL14025	25	1	277	A$ 396.48	RFQ
D	FAL36025	25	3	600	A$ 1810.29
D	FAL32025	25	3	240	A$ 873.69
C	FAL12025	25	1	120	A$ 360.77	RFQ
A	FAL34030-1212	30	3	480	-	RFQ
A	FAL34030-1021	30	3	480	-	RFQ
D	FAL36030-2100	30	3	600	-	RFQ
D	FAL36030-1212	30	3	600	-	RFQ
B	FAL26030	30	2	600	A$ 1144.48	RFQ
C	FAL14030	30	1	277	A$ 396.48	RFQ
E	FAL3603015M-1212	30	3	600	-	RFQ
C	FAL12030	30	1	120	A$ 360.77
D	FAL36035	35	3	600	-	RFQ
A	FAL36035-1212	35	3	600	-	RFQ
D	FAL32035	35	3	240	A$ 1088.28
A	FAL34040-1042	40	3	480	A$ 1803.47	RFQ

SQUARE D -

FAP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	FAP36015	15	A$ 1659.43
A	FAP36020	20	-	RFQ
A	FAP36025	25	-	RFQ
A	FAP36030	30	-	RFQ
A	FAP36050	50	-	RFQ
A	FAP36060	60	-	RFQ
A	FAP36080	80	A$ 1961.14
A	FAP36100	100	-	RFQ

SQUARE D -

BDL Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Phase	Width	Price (inc. GST)
A	BDL36015	15A	3	3	3.19"	A$ 1717.11
B	BDL26015	15A	2	1	2.13"	A$ 1321.99
B	BDL26020	20A	2	1	2.13"	A$ 1321.99
A	BDL36020	20A	3	3	3.19"	A$ 1717.11
A	BDL36030	30A	3	3	3.19"	A$ 1717.11
B	BDL26030	30A	2	1	2.13"	A$ 1321.99
B	BDL26040	40A	2	1	2.13"	A$ 1665.19
A	BDL36040	40A	3	3	3.19"	A$ 1717.11
A	BDL36050	50A	3	3	3.19"	A$ 1717.11
B	BDL26050	50A	2	1	2.13"	A$ 1321.99
B	BDL26060	60	2	-	-	A$ 1750.85
A	BDL36060	60A	3	3	3.19"	A$ 1717.11
B	BDL26070	70A	2	1	2.13"	A$ 1955.54
A	BDL36070	70A	3	3	3.19"	A$ 2303.69
A	BDL36080	80A	3	3	3.19"	A$ 2303.69
B	BDL26080	80A	2	1	2.13"	A$ 1586.24
A	BDL26090	90	2	-	-	A$ 1955.54
A	BDL36090	90A	3	3	3.19"	A$ 2303.69
A	BDL26100	100A	2	1	2.13"	A$ 1526.02
A	BDL36100	100A	3	3	3.19"	A$ 2303.69

SQUARE D -

HDP Series, Circuit Breaker
Square D HDP Series circuit breakers are designed for protecting downstream components from severe inrush currents. They feature a thermal magnetic trip unit that allows both instantaneous and time-delayed functions for maximum overcurrent protection. These 3-pole design circuit breakers have a unique I-line design with lugs load and nut line terminals, providing easy installation and hassle-free wiring configuration. They can accommodate copper or aluminium wires with sizes ranging from 14 - 3/0 AWG, for flexibility, strength and safety. These UL-listed breakers offer bolt-on mounting for installation in both vertical and horizontal positions.

Style	Model	Amps	Price (inc. GST)
A	HDP36015	15	-	RFQ
A	HDP36020	20	-	RFQ
A	HDP36025	25	-	RFQ
A	HDP36030	30	A$ 1418.03
A	HDP36035	35	-	RFQ
A	HDP36040	40	-	RFQ
A	HDP36045	45	-	RFQ
A	HDP36050	50	-	RFQ
A	HDP36060	60	-	RFQ
A	HDP36070	70	-	RFQ
A	HDP36080	80	-	RFQ
A	HDP36090	90	-	RFQ
A	HDP36100	100	-	RFQ
A	HDP36110	110	A$ 2692.15	RFQ
A	HDP36125	125	-	RFQ
A	HDP36150	150	A$ 2692.15

SQUARE D -

HJP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	HJP36020	20	-	RFQ
A	HJP36030M71	30	-	RFQ
A	HJP36030	30	-	RFQ
A	HJP36040	40	-	RFQ
A	HJP36100	100	A$ 2424.00

SQUARE D -

DJL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	DJL36000S40	400	A$ 6619.96	RFQ
A	DJL36000S60	600	-	RFQ

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Motor Circuit Protector, 3 Pole

Style	Model	Price (inc. GST)
A	LAL3640036M-1021	A$ 13439.21	RFQ
A	LAL3640035M-1021	-	RFQ

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LGA Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LGA36600U31X	-	A$ 13200.00
A	LGA36400U33X	-	A$ 9504.00
A	LGA36400U31X	400	A$ 9504.00
A	LGA36400U44X	400	A$ 14784.00
A	LGA36400CU31X	400	A$ 12304.64
A	LGA36400CU33X	400	A$ 12304.64
A	LGA36400CU44X	400	A$ 14738.97
A	LGA36600U33X	600	A$ 13728.00
A	LGA36600U44X	600	A$ 17952.00

SQUARE D -

LHP Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	LHP36300MB	300	3	A$ 7685.27
A	LHP26400MB	400	2	-	RFQ
A	LHP36400MB	400	3	A$ 7685.27

SQUARE D -

FAB Series, Circuit Breaker

Style	Model	Amps
A	FAB36015	15	RFQ
A	FAB36030	30	RFQ
A	FAB36050	50	RFQ
A	FAB36080	80	RFQ

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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.

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.

Categories

Brands

Molded Case Circuit Breakers

TECL Frame Circuit Breaker

JJP Series, Circuit Breaker

FCP Series, Circuit Breaker

LGB Series, Bolt On Circuit Breaker

LGL Series, Circuit Breaker

BDA Series, Circuit Breaker

BGA Series, Circuit Breaker

BGL Series, Circuit Breaker

BJA Series, Circuit Breaker

BJL Series, Circuit Breaker

FA Series, Circuit Breaker

FAL Series, Circuit Breaker

FAP Series, Circuit Breaker

BDL Series, Circuit Breaker

HJP Series, Circuit Breaker

DJL Series, Circuit Breaker

Motor Circuit Protector, 3 Pole

LGA Series, Circuit Breaker

LHP Series, Circuit Breaker

FAB Series, Circuit Breaker

Molded Case Circuit Breakers

Working Mechanism

Features

Frequently Asked Questions

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