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

SQUARE D -

PKL Series, Circuit Breaker

Style	Model
A	PKL36060CU33A	RFQ
A	PKL36060U31A	RFQ
A	PKL36000S60	RFQ

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QGP Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	QGP22100TM	100	2	SGD 2008.69
B	QGP32125TM	125	3	SGD 3246.38
B	QGP32175TM	175	3	SGD 3246.38
A	QGP22175TM	175	2	SGD 2008.69
A	QGP22225TM	225	2	SGD 2008.69

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QDP Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	QDP22070TM	70	2	SGD 1358.61
A	QDP22080TM	80	2	SGD 1358.61
A	QDP22150TM	150	2	SGD 1358.61
B	QDP32175TM	175	3	SGD 2008.69
B	QDP32225TM	225	3	SGD 2008.69

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QBP Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	QBP32070TM	70	3	SGD 1358.61
B	QBP22110TM	110	2	SGD 860.11
B	QBP22125TM	125	2	SGD 677.80

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Q2L Series, Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	Q2L3100	100	3	SGD 1746.23	RFQ
B	Q2L2100	100	2	SGD 912.52	RFQ
A	Q2L3110	110	3	-	RFQ
A	Q2L3125	125	3	-	RFQ
B	Q2L2125	125	2	-	RFQ
A	Q2L3150H	150	3	SGD 2008.69	RFQ
B	Q2L2150	150	2	-	RFQ
A	Q2L3150	150	3	-	RFQ
A	Q2L3175	175	3	-	RFQ
B	Q2L2200	200	2	SGD 1925.88	RFQ
A	Q2L3200	200	3	-	RFQ
A	Q2L3225	225	3	-	RFQ
A	Q2L3225H	225	3	SGD 2008.69	RFQ
B	Q2L2225	225	2	SGD 1746.23	RFQ

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PLL Series, Circuit Breaker

Style	Model	Voltage	Price (inc. GST)
A	PLL34100	480	SGD 19115.30	RFQ
A	PLL34100U44A	600	-	RFQ

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PLA Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	PLA34080	800	SGD 28608.08
A	PLA34120	1000	-	RFQ
A	PLA34100	1000	-	RFQ

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RGF Series, Circuit Breaker

Style	Model	Amps
A	RGF36160U41A	1600	RFQ
A	RGF36160U31A	1600	RFQ
A	RGF36200U41A	2000	RFQ

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LJA Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LJA36400U33X	-	SGD 12527.65
A	LJA36600U31X	-	SGD 17284.04
A	LJA36250U31X	250	SGD 11652.48
A	LJA36400U31X	400	SGD 11833.68
A	LJA36400U44X	400	SGD 14883.84
A	LJA36400CU33X	400	SGD 10916.75	RFQ
A	LJA36400CU31X	400	SGD 17284.04
A	LJA36400CU44X	400	SGD 21614.12
A	LJA36600U33X	600	SGD 17284.04
A	LJA36600U44X	600	SGD 21226.51
A	LJA36600U31XTB	600	-	RFQ

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PEF Series, Circuit Breaker

Style	Model	Amps
A	PEF361200LIG	1200	RFQ
A	PEF362500LIG	2500	RFQ

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NA Series, Plug In Circuit Breaker

Style	Model	Amps
A	NA36900	900	RFQ
A	NA361000	1000	RFQ

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MXL Series, Circuit Breaker
Square D MXL Series circuit breakers are used to safeguard power distribution systems, equipment and critical machinery from overcurrents and short circuits. They are used in commercial, industrial and institutional facilities where electrical protection is paramount. These MXL Series circuit breakers have a solid-state protection mechanism that provides precise and responsive protection against electrical faults and increased stability. Whether dealing with overcurrents, short circuits, or other potential hazards, the solid-state protection of these circuit breakers plays a crucial role in preventing damage and ensuring the uninterrupted operation of electrical systems. They incorporate LSI (long-time, short-time and Instantaneous) functions allowing for accurate and adjustable protection based on the specific characteristics of the connected load. These circuit breakers have a three-pole configuration safeguarding each phase against potential faults, thus enhancing the efficiency of the protection.

Style	Model	Amps
A	MXL36400	400	RFQ
A	MXL36600	600	RFQ
A	MXL36800	800	RFQ

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LLL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LLL36400CU31X	400	-	RFQ
A	LLL36400CU33X	400	-	RFQ
A	LLL36600U31X	600	SGD 16347.51

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LJL Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LJL36250CU33X	250	SGD 11356.60	RFQ
A	LJL36400U31X	400	SGD 11652.48
A	LJL36400U33X	400	SGD 11973.10
A	LJL36600U31XSA	600	-	RFQ
A	LJL36600U33XAB	600	-	RFQ
A	LJL36600U33X	600	SGD 14588.66
A	LJL36600U31X	600	SGD 13386.68

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LLA Series, Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	LLA36400U54XEKYP	400	-	RFQ
A	LLA36400U33X	400	-	RFQ
A	LLA36400U44X	400	-	RFQ
A	LLA36000S40X	400	SGD 10367.28	RFQ
A	LLA36400CU31X	400	-	RFQ
A	LLA36400U31X	400	SGD 17284.04
A	LLA36600U31X	600	SGD 19142.06
A	LLA36600U44X	600	SGD 19115.30	RFQ
A	LLA36600U33X	600	SGD 19142.06

SIEMENS -

BF Series, Bolt On Circuit Breaker

Style	Model	Amps	Frame Type	Number Of Poles	Voltage	Price (inc. GST)
A	BF115AH	15	B	1	120V	SGD 506.66
A	BF115A	15	B	1	120V	SGD 284.11
A	BF115H	15	B	1	120V	SGD 481.34
B	BF215A	15	B	2	240V	SGD 532.75
C	BF1B015	15	BF	1	120V	-	RFQ
A	BF120A	20	B	1	120V	SGD 284.11
A	BF120AH	20	B	1	120V	SGD 506.66
B	BF220A	20	B	2	240V	SGD 815.14
A	BF125A	25	B	1	120V	SGD 284.11
A	BF130A	30	B	1	120V	SGD 284.11
A	BF130AH	30	B	1	120V	SGD 506.66
B	BF230A	30	B	2	240V	SGD 532.75
B	BF240A	40	B	2	240V	SGD 580.62
B	BF250A	50	B	2	240V	SGD 580.62
B	BF260A	60	B	2	240V	SGD 580.62

SIEMENS -

CFD Series, Bolt On Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	CFD63B080	80	3	SGD 5330.27
A	CFD63B090	90	3	SGD 5330.27
B	CFD63B110	110	3	-	RFQ
B	CFD63B225	225	3	-	RFQ
B	CFD62B250	250	2	-	RFQ

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Molded Case Circuit Breakers: HGL Series
Square D HGL Series circuit breakers are designed to protect electrical equipment from damages caused by short circuits and overload occurrences. These units come equipped with a thermal-magnetic trip, calibrated at 40 degrees C ( ambient temperature), allowing both instantaneous and long-time current limiting functions. The H-frame design of these breakers offers interrupt capacities of 65kA @ 240 VAC, 35kA @ 480 VAC and 18kA @ 600 VAC. These breakers feature unit mounting (lug-lug) construction for reducing the installation and maintenance downtime and can accommodate aluminium or copper wires with sizes ranging from 14 to 3 AWG. Choose from a wide range of these IEC protectors available in 2 and 3 pole configurations on Raptor Supplies.

Style	Model	Amps	Frame Size	Number Of Poles	Phase	Voltage	Width	Price (inc. GST)
A	HGL26015	15	60A/HG	2	1	-	2.7"	SGD 1455.90
B	HGL36015	15	60A/HG	3	3	-	4.1"	SGD 1455.90
A	HGL26025	25	60A/HG	2	1	-	2.7"	SGD 2534.92
A	HGL26030	30	60A/HG	2	1	-	2.7"	SGD 1455.90
C	HGL36030	30	60A/HG	3	3	-	4.1"	SGD 1455.90
A	HGL26035	35A	-	2	-	600V	-	-	RFQ
A	HGL26040	40	60A/HG	2	1	-	2.7"	SGD 1455.90
A	HGL26045	45A	-	2	-	600V	-	SGD 1603.50
A	HGL26050	50	60A/HG	2	1	-	2.7"	SGD 1455.90
D	HGL36050	50	60A/HG	3	3	-	4.1"	SGD 1455.90
E	HGL36060	60	60A/HG	3	3	-	4.1"	SGD 1455.90
F	HGL36060SA	60	-	3	-	600	-	-	RFQ
G	HGL36070	70	100A/HG	3	3	-	4.1"	SGD 1925.88
A	HGL26070	70	100A/HG	2	1	-	2.7"	SGD 1840.75
G	HGL36080	80	100A/HG	3	3	-	4.1"	SGD 1925.88
A	HGL26080	80	100A/HG	2	1	-	2.7"	SGD 2868.88
H	HGL36090	90	100A/HG	3	3	-	4.1"	SGD 1925.88
A	HGL26090	90	100A/HG	2	1	-	2.7"	SGD 1840.75
A	HGL26100	100	100A/HG	2	1	-	2.7"	SGD 1840.75
I	HGL36110	110A	-	3	-	600V	-	SGD 2907.96
E	HGL36125	125	150A/HG	3	3	-	4.1"	SGD 2907.96
J	HGL26150	150	150A/HG	2	1	-	2.7"	SGD 2332.84
E	HGL36150	150	150A/HG	3	3	-	4.1"	SGD 2907.96
F	HGL36150U33XSA	150	-	3	-	600	-	-	RFQ

GENERAL ELECTRIC -

TED Series Circuit Breakers
General Electric TED Series moulded case circuit breakers provide overcurrent and short circuit protection when used with GE panelboards. These feed-thru breakers feature a thermal magnetic trip for instantaneous and long-time overcurrent protection and a toggle actuator for manual tripping operation & indicating the status of the trip. They are equipped with line & load side lug terminals to accommodate aluminium and copper wires of sizes between 14 AWG and 2/0 AWG. Selected models feature bolt-on mounting style for installation in vertical or horizontal orientation. These TED circuit breakers are available in 277VAC & 480VAC voltage ratings on Raptor Supplies.

Style	Model	Aic Rating	Amps	Max. Wire Size	Min. Wire Size	Number Of Poles	Voltage	Price (inc. GST)
A	TED124015WL	-	15	-	-	2	-	SGD 1631.79
B	TED124020WL	-	20	8 AWG	14 AWG	2	-	SGD 1545.58
B	TED124025WL	-	25	8 AWG	14 AWG	2	-	SGD 1513.46
B	TED124030WL	-	30	8 AWG	14 AWG	2	-	SGD 1519.65
B	TED124035WL	-	35	3 AWG (Cu), 1 AWG (Al)	14 AWG (Cu), 12 AWG (Al)	2	-	SGD 1522.97
B	TED124040WL	-	40	3 AWG (Cu), 1 AWG (Al)	14 AWG (Cu), 12 AWG (Al)	2	-	SGD 1519.65
B	TED124045WL	-	45	3 AWG (Cu), 1 AWG (Al)	14 AWG (Cu), 12 AWG (Al)	2	-	SGD 1522.97
B	TED124050WL	-	50	-	-	2	-	SGD 1513.46
B	TED124060WL	-	60	3 AWG (Cu), 1 AWG (Al)	14 AWG (Cu), 12 AWG (Al)	2	-	SGD 1571.29
B	TED124070WL	-	70	2/0 AWG	6 AWG (Cu), 4 AWG (Al)	2	-	SGD 1972.29
C	TED113Y100	14kAIC@240V	100A	-	-	1	277V	-	RFQ
D	TED124010WL	18kAIC@480V	10A	-	-	2	480V	SGD 351.63	RFQ

GENERAL ELECTRIC -

Molded Case Circuit Breakers, THQB Series
General Electric THQB Series circuit breakers are suitable for protecting electrical circuits and machinery against current overloads and short circuits. These devices feature thermal-magnetic trip mechanisms that deliver both long-time and instantaneous current limiting functions against faulty currents. They are integrated with a bolt-on mounting facility for reducing the installation downtime in reverse-feed applications. These UL-listed circuit breakers are rated at 240V and calibrated at an ambient temperature of 40 degrees C. Choose from a wide range of these circuit breakers available in 15A, 20A, 25A, 30A and 100A current rating options on Raptor Supplies.

Style	Model	Aic Rating	Amps	Circuit Breaker Type	Max. Wire Size	Min. Wire Size	Number Of Poles	Terminal Connection	Width	Price (inc. GST)
A	THQB32020	-	20	Standard	8 AWG	14 AWG	3	Screw Clamp	3"	SGD 202.63
A	THQB32030	-	30	Standard	8 AWG	14 AWG	3	Screw Clamp	3"	SGD 202.63
A	THQB32070	-	70	Standard	3 AWG	8 AWG	3	Lug	3"	SGD 237.68
A	THQB32080	-	80	Standard	1/0 AWG	6 AWG	3	Lug	3"	SGD 290.74
A	THQB32100	-	100	Standard	1/0 AWG	6 AWG	3	Lug	3"	SGD 290.74
B	THQB32080ST1	10kAIC@120V	80A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 607.16	RFQ
C	THQB32070ST1	10kAIC@120V	70A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 574.88	RFQ
D	THQB32060ST1	10kAIC@120V	60A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 507.21	RFQ
B	THQB32030ST1	10kAIC@120V	30A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 507.21	RFQ
E	THQB32020ST1	10kAIC@120V	15A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 507.21	RFQ
B	THQB32015ST1	10kAIC@120V	15A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 507.21	RFQ
B	THQB31WY30	10kAIC@120V	30A	Thermal Magnetic Protection	-	-	3	-	-	SGD 237.68	RFQ
E	THQB31WY20	10kAIC@120V	20A	Thermal Magnetic Protection	-	-	3	-	-	SGD 237.68	RFQ
B	THQB31WY15	10kAIC@120V	15A	Thermal Magnetic Protection	-	-	3	-	-	SGD 237.68	RFQ
B	THQB21WY30	10kAIC@120V	30A	Thermal Magnetic Protection	-	-	2	-	-	SGD 220.87	RFQ
B	THQB21WY20	10kAIC@120V	20A	Thermal Magnetic Protection	-	-	2	-	-	SGD 220.87
F	THQB21WY15	10kAIC@120V	15A	Thermal Magnetic Protection	-	-	2	-	-	SGD 220.87
B	THQB2190ST1	10kAIC@120V	90A	Standard, 120V Stunt Trip	-	-	2	-	2"	SGD 456.36	RFQ
G	THQB2180ST1	10kAIC@120V	80A	Standard, 120V Stunt Trip	-	-	2	-	2"	SGD 456.36	RFQ
F	THQB2170ST1	10kAIC@120V	70A	Standard, 120V Stunt Trip	-	-	2	-	2"	-	RFQ
B	THQB32090ST1	10kAIC@120V	90A	Standard, 120V Stunt Trip	-	-	3	-	3"	SGD 607.16	RFQ
E	THQB32015	10kAIC@240V	15A	Standard	-	-	3	-	3"	SGD 202.63
E	THQB32025	10kAIC@240V	25A	Standard	-	-	3	-	3"	SGD 213.91
F	THQB2190	10kAIC@240V	90A	Standard	-	-	2	-	2"	SGD 173.66
E	THQB32035	10kAIC@240V	35A	Standard	-	-	3	-	3"	SGD 220.87

SIEMENS -

Bolt-On Circuit Breakers: FXD Series
Siemens FXD Series circuit breakers are designed to protect an electrical circuit from overcurrent. They feature a trip-free mechanism with quick make quick break function that is independent of the operating toggle and opens the contacts under short circuit conditions, even if the handle is in the ON position. These UL-listed circuit breakers deliver an interrupting capacity of 35kA at 480V and are ideal for switchboards and lighting & power panels. They feature bolt-on mounting with lug terminals for ease of installation and secure wiring configuration. Raptor Supplies offers a wide range of Sentron Series circuit breakers in 2 and 3 pole variants.

Style	Model	Amps	Frame Type	Number Of Poles	Price (inc. GST)
A	FD62B070	70	FD	2	-	RFQ
A	FXD62B070	70	FXD	2	-	RFQ
B	FXD63B070	70A	FXD	3	-	RFQ
A	FXD62B080	80	FXD	2	SGD 2171.21
C	FD62B080	80A	FD	2	-	RFQ
D	FXD63B080	80A	FXD	3	SGD 2394.09
A	FXD62B090	90	FXD	2	SGD 2171.21
E	FXD63B090	90A	FXD	3	-	RFQ
C	FD62B090	90A	FD	2	-	RFQ
A	FXD62B100	100	FXD	2	SGD 2171.21
C	FD62B100	100A	FD	2	-	RFQ
F	FXD63B100	100A	FXD	3	SGD 2394.09
A	FXD62B110	110	FXD	2	SGD 2171.21
C	FD62B110	110A	FD	2	-	RFQ
G	FXD63B110	110A	FXD	3	SGD 2394.09
A	FXD62B125	125	FXD	2	SGD 7671.40
H	FXD63B125	125A	FXD	3	SGD 2394.09
C	FD62B125	125A	FD	2	-	RFQ
A	FXD62B150	150	FXD	2	SGD 2171.21
I	FXD63L150	150	FXD	3	SGD 2882.98
J	FXD63B150	150A	FXD	3	SGD 2394.09
K	FXD63H150	150A	FXD	3	SGD 2882.98
C	FD62B150	150A	FD	2	-	RFQ
L	FXD63A150	150A	FXD	3	SGD 2882.98
A	FXD62B175	175	FXD	2	SGD 2171.21

1...101112...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.

Categories

Brands

Molded Case Circuit Breakers

PKL Series, Circuit Breaker

QGP Series, Circuit Breaker

QDP Series, Circuit Breaker

QBP Series, Circuit Breaker

Q2L Series, Circuit Breaker

PLL Series, Circuit Breaker

PLA Series, Circuit Breaker

RGF Series, Circuit Breaker

LJA Series, Circuit Breaker

PEF Series, Circuit Breaker

NA Series, Plug In Circuit Breaker

LLL Series, Circuit Breaker

LJL Series, Circuit Breaker

LLA Series, Circuit Breaker

BF Series, Bolt On Circuit Breaker

CFD Series, Bolt On Circuit Breaker

Molded Case Circuit Breakers

Working Mechanism

Features

Frequently Asked Questions

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