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	SGD 2333.51	RFQ

SQUARE D -

JJP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	JJP36200	200	SGD 5821.81
A	JJP36250	250	SGD 6297.87

SQUARE D -

FCP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	FCP34060	60	SGD 2907.96	RFQ
A	FCP34090	90	SGD 3364.90	RFQ
A	FCP34100	100	-	RFQ

SIEMENS -

HB Series, Bolt On Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	HB1B015	15	1	120V	SGD 153.43
B	HB3B015	15	3	240V	SGD 577.97
C	HB2B015	15	2	240V	-	RFQ
C	HB2B020	20	2	240V	SGD 334.97
B	HB3B020	20	3	240V	SGD 577.97
A	HB1B020	20	1	120V	-	RFQ
B	HB3B030	30	3	240V	SGD 577.97
C	HB2B030	30	2	240V	SGD 334.97
A	HB1B030	30	1	120V	SGD 153.43
C	HB2B040	40	2	240V	SGD 382.84
B	HB3B040	40	3	240V	SGD 723.57
B	HB3B050	50	3	240V	SGD 723.57
C	HB2B050	50	2	240V	SGD 382.84
C	HB2B060	60	2	240V	SGD 382.84
B	HB3B060	60	3	240V	-	RFQ
C	HB2B070	70	2	240V	SGD 577.97
B	HB3B070	70	3	240V	SGD 920.14
C	HB2B080	80	2	240V	-	RFQ
B	HB3B080	80	3	240V	-	RFQ
C	HB2B090	90	2	240V	SGD 577.97
B	HB3B090	90	3	240V	-	RFQ
C	HB2B100	100	2	240V	SGD 577.97
B	HB3B100	100	3	240V	SGD 910.64

SQUARE D -

LGL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LGL36400U31X	400	SGD 8171.70
A	LGL36400U33X	400	SGD 8718.40
A	LGL36400U44X	400	SGD 12527.65
A	LGL36000S40X	400	-	RFQ
A	LGL36600U31X	600	SGD 9095.51
A	LGL36000S60X	600	-	RFQ
A	LGL36600U33X	6600	SGD 9095.51

SQUARE D -

BDA Series, Circuit Breaker

Style	Model	Ac Voltage Rating	Amps	Number Of Poles	Price (inc. GST)
A	BDA34125Y	-	125	3	SGD 2407.47
B	BDA260704	-	70	2	-	RFQ
B	BDA36035	-	35	3	SGD 1746.23
B	BDA260904	-	90	2	-	RFQ
B	BDA260902	-	90	2	SGD 1396.20
B	BDA260901	-	90	2	-	RFQ
B	BDA260804	-	80	2	-	RFQ
B	BDA260801	-	80	2	SGD 1396.20
B	BDA261004	-	100	2	-	RFQ
A	BDA34110Y	-	110	3	SGD 2589.67
B	BDA260702	-	70	2	SGD 1396.20
B	BDA36125	-	125	3	SGD 2246.94
B	BDA260701	-	70	2	SGD 1396.20
B	BDA260204	-	20	2	SGD 1298.25
B	BDA260152	-	15	2	SGD 1298.25
B	BDA260151	-	15	2	SGD 1298.25
B	BDA260504	-	50	2	-	RFQ
B	BDA260501	-	50	2	SGD 1298.25
B	BDA260404	-	40	2	SGD 1298.25
B	BDA260402	-	40	2	SGD 1298.25
B	BDA36045	-	45	3	SGD 1746.23
B	BDA261002	-	100	2	SGD 1396.20
A	BDA36110	-	110	3	SGD 2589.67
B	BDA260154	-	15	2	-	RFQ
B	BDA260601	-	60	2	SGD 1298.25

SQUARE D -

BGA Series, Circuit Breaker

Style	Model	Amps	Voltage	Price (inc. GST)
A	BGA34015Y	15	480	SGD 2589.67
A	BGA34020Y	20	480	SGD 2589.67
A	BGA34025Y	25	480	SGD 2082.75
A	BGA34030Y	30	480	SGD 2589.67
A	BGA34040Y	40	480	SGD 2589.67
A	BGA34050Y	50	480	-	RFQ
A	BGA34060Y	60	480	SGD 2589.67
A	BGA34070Y	70	480	SGD 2477.99
A	BGA34080Y	80	480	SGD 2847.71
A	BGA34090Y	90	480	SGD 2847.71
A	BGA34100Y	100	480	SGD 2439.69
A	BGA36110	110	600	SGD 2907.96
A	BGA34125Y	125	480	SGD 3643.28
A	BGA36125	125	600	SGD 2560.04

SQUARE D -

BGL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	BGL36015	15	SGD 2124.78
A	BGL36020	20	SGD 2124.78
A	BGL36030	30	SGD 2008.69
A	BGL36040	40	SGD 2008.69
A	BGL36050	50	SGD 2008.69
A	BGL36060	60	SGD 2008.69
A	BGL36070	70	SGD 2407.47
A	BGL36080	80	SGD 2407.47
A	BGL36090	90	SGD 2407.47
A	BGL36100	100	SGD 2407.47
A	BGL36125	125	SGD 2907.96

SQUARE D -

BJA Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	BJA36015	15	3	SGD 2215.32
A	BJA260151	15	2	SGD 3255.09
A	BJA260152	15	2	SGD 1892.05	RFQ
A	BJA260154	15	2	-	RFQ
A	BJA260201	20	2	SGD 1892.05
A	BJA260202	20	2	SGD 1892.05	RFQ
A	BJA36020	20	3	SGD 2215.32
A	BJA260204	20	2	SGD 1892.05
A	BJA36025	25	3	SGD 2560.04
A	BJA260301	30	2	SGD 1892.05
A	BJA36030	30	3	SGD 2215.32
A	BJA260304	30	2	-	RFQ
A	BJA260302	30	2	SGD 1892.05	RFQ
A	BJA36035	35	3	SGD 2560.04
A	BJA36040	40	3	SGD 2215.32
A	BJA260402	40	2	SGD 1892.05	RFQ
A	BJA260404	40	2	SGD 1892.05
A	BJA260401	40	2	SGD 1892.05
A	BJA36050	50	3	SGD 2215.32
A	BJA260501	50	2	-	RFQ
A	BJA260504	50	2	-	RFQ
A	BJA260502	50	2	SGD 1892.05	RFQ
A	BJA260601	60	2	SGD 2008.69
A	BJA36060	60	3	SGD 2215.32
A	BJA260604	60	2	-	RFQ

SQUARE D -

BJL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	BJL36015	15	SGD 2377.95
A	BJL36020	20	SGD 2891.91
A	BJL36030	30	SGD 2377.95
A	BJL36040	40	SGD 2377.95
A	BJL36050	50	SGD 2377.95
A	BJL36060	60	SGD 2377.95
A	BJL36070	70	SGD 2962.47
A	BJL36080	80	SGD 2962.47
A	BJL36090	90	SGD 2962.47
A	BJL36100	100	SGD 2962.47
A	BJL36125	125	SGD 4948.04

SQUARE D -

FA Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	FA24015BC	15	2	480	SGD 1382.27	RFQ
B	FA14015B	15	1	277	-	RFQ
C	FA36015-1021	15	3	600	SGD 2907.96
A	FA26015BC	15	2	600	SGD 1358.61	RFQ
C	FA36015-2100	15	3	600	-	RFQ
A	FA22015BC	15	2	240	SGD 931.20	RFQ
A	FA22015AC	15	2	240	SGD 931.20	RFQ
A	FA22015AB	15	2	240	SGD 931.20	RFQ
D	FA3601535	15	3	600	SGD 1925.88	RFQ
D	FA32015	15	3	240	SGD 1154.86	RFQ
B	FA14015C	15	1	277	-	RFQ
A	FA26015AC	15	2	600	SGD 1358.61
B	FA14015A	15	1	277	-	RFQ
A	FA26015AB	15	2	600	-	RFQ
C	FA34015-1021	15	3	480	SGD 2367.56	RFQ
A	FA24015AB	15	2	480	SGD 1382.27	RFQ
A	FA24015AC	15	2	480	SGD 1382.27	RFQ
A	FA22020AB	20	2	240	SGD 931.20	RFQ
E	FA34020-1021	20	3	480	SGD 2367.56	RFQ
A	FA26020BC	20	2	600	SGD 1358.61	RFQ
A	FA22020BC	20	2	240	SGD 931.20	RFQ
A	FA22020AC	20	2	240	SGD 931.20	RFQ
A	FA26020AB	20	2	600	SGD 1358.61	RFQ
D	FA36020-1021	20	3	600	SGD 2607.03	RFQ
D	FA36020G35	20	3	600	SGD 1925.88	RFQ

SQUARE D -

FAL Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	FAL34070-1380	-	-	-	-	RFQ
A	FAL34070-1021	-	-	-	SGD 1823.73	RFQ
B	FAL22000	-	2	240	-	RFQ
C	FAL14015	15	1	277	SGD 344.14
B	FAL26020	20	2	600	SGD 1055.25
A	FAL34020-1021	20	3	480	-	RFQ
A	FAL34020-1212	20	3	480	SGD 1435.01	RFQ
A	FAL36020-1021	20	3	600	SGD 2300.45	RFQ
A	FAL34025-1212	25	3	480	-	RFQ
D	FAL36025	25	3	600	SGD 1588.57
D	FAL32025	25	3	240	SGD 958.07
C	FAL14025	25	1	277	SGD 344.14	RFQ
C	FAL12025	25	1	120	SGD 315.40	RFQ
A	FAL34030-1212	30	3	480	-	RFQ
D	FAL36030-2100	30	3	600	-	RFQ
A	FAL34030-1021	30	3	480	-	RFQ
C	FAL12030	30	1	120	SGD 315.40
D	FAL36030-1212	30	3	600	-	RFQ
E	FAL3603015M-1212	30	3	600	-	RFQ
C	FAL14030	30	1	277	SGD 344.14	RFQ
B	FAL26030	30	2	600	SGD 1055.25	RFQ
A	FAL36035-1212	35	3	600	-	RFQ
D	FAL36035	35	3	600	-	RFQ
D	FAL32035	35	3	240	SGD 958.07
C	FAL14040	40	1	277	-	RFQ

SQUARE D -

FAP Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	FAP36015	15	SGD 1434.79
A	FAP36020	20	-	RFQ
A	FAP36025	25	-	RFQ
A	FAP36030	30	-	RFQ
A	FAP36050	50	-	RFQ
A	FAP36060	60	-	RFQ
A	FAP36080	80	SGD 1736.17
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"	SGD 1455.90
B	BDL26015	15A	2	1	2.13"	SGD 1154.86
B	BDL26020	20A	2	1	2.13"	SGD 1154.86
A	BDL36020	20A	3	3	3.19"	SGD 1455.90
A	BDL36030	30A	3	3	3.19"	SGD 1455.90
B	BDL26030	30A	2	1	2.13"	SGD 1528.64
B	BDL26040	40A	2	1	2.13"	SGD 1464.43
A	BDL36040	40A	3	3	3.19"	SGD 1455.90
A	BDL36050	50A	3	3	3.19"	SGD 1455.90
B	BDL26050	50A	2	1	2.13"	SGD 1154.86
B	BDL26060	60	2	-	-	SGD 1154.86
A	BDL36060	60A	3	3	3.19"	SGD 1455.90
B	BDL26070	70A	2	1	2.13"	SGD 1719.76
A	BDL36070	70A	3	3	3.19"	SGD 1925.88
A	BDL36080	80A	3	3	3.19"	SGD 1925.88
B	BDL26080	80A	2	1	2.13"	SGD 1313.62
A	BDL26090	90	2	-	-	SGD 1719.76
A	BDL36090	90A	3	3	3.19"	SGD 1925.88
A	BDL26100	100A	2	1	2.13"	SGD 1313.62
A	BDL36100	100A	3	3	3.19"	SGD 1925.88

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	SGD 1256.02
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	SGD 2377.95	RFQ
A	HDP36125	125	-	RFQ
A	HDP36150	150	SGD 2377.95

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	SGD 2332.84

SQUARE D -

DJL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	DJL36000S40	400	SGD 5779.46	RFQ
A	DJL36000S60	600	-	RFQ

SQUARE D -

Motor Circuit Protector, 3 Pole

Style	Model	Price (inc. GST)
A	LAL3640036M-1021	SGD 12527.65	RFQ
A	LAL3640035M-1021	-	RFQ

SQUARE D -

LGA Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LGA36600U31X	-	SGD 11652.48
A	LGA36400U33X	-	SGD 8718.40
A	LGA36400U31X	400	SGD 8718.40
A	LGA36400U44X	400	SGD 13386.68
A	LGA36400CU31X	400	SGD 10030.16
A	LGA36400CU33X	400	SGD 10923.24
A	LGA36400CU44X	400	SGD 13386.68
A	LGA36600U33X	600	SGD 12527.65
A	LGA36600U44X	600	SGD 15861.94

SQUARE D -

LHP Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	LHP36300MB	300	3	SGD 6779.78
A	LHP26400MB	400	2	-	RFQ
A	LHP36400MB	400	3	SGD 6779.78

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

HB 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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