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 -

SGLC Frame Circuit Breaker

Style	Model	Amps	Item	Price (inc. GST)
A	SGLC3604L3XX	-	Bolt On Circuit Breaker	SGD 6706.04	RFQ
A	SGLC3604L4XX	400	Miniature Circuit Breaker	SGD 7724.16	RFQ
A	SGLC3604L5XX	400	Miniature Circuit Breaker	-	RFQ
A	SGLC3604L7XX	400	Miniature Circuit Breaker	-	RFQ
A	SGLC3606L3XX	600	Miniature Circuit Breaker	SGD 8210.39	RFQ
A	SGLC3606L4XX	600	Miniature Circuit Breaker	SGD 9223.54	RFQ
A	SGLC3606L5XX	600	Miniature Circuit Breaker	SGD 9555.54	RFQ
A	SGLC3606L7XX	600	Miniature Circuit Breaker	SGD 10092.63	RFQ

GENERAL ELECTRIC -

SKHC Frame Circuit Breaker

Style	Model	Amps	Item	Price (inc. GST)
A	SKHC3612L7XX	-	Bolt On Circuit Breaker	-	RFQ
A	SKHC3608L3XX	800	Miniature Circuit Breaker	SGD 11571.88	RFQ
A	SKHC3608L4XX	800	Miniature Circuit Breaker	-	RFQ
A	SKHC3608L5XX	800	Miniature Circuit Breaker	-	RFQ
A	SKHC3608L7XX	800	Miniature Circuit Breaker	SGD 14504.96	RFQ
A	SKHC3612L3XX	1200	Miniature Circuit Breaker	-	RFQ
A	SKHC3612L4XX	1200	Miniature Circuit Breaker	-	RFQ
A	SKHC3612L5XX	1200	Miniature Circuit Breaker	-	RFQ

GENERAL ELECTRIC -

SKLC Frame Circuit Breaker

Style	Model	Amps	Item	Price (inc. GST)
A	SKLC3608L3XX	-	Bolt On Circuit Breaker	-	RFQ
A	SKLC3612L7XX	-	Bolt On Circuit Breaker	SGD 19397.12	RFQ
A	SKLC3608L4XX	800	Miniature Circuit Breaker	-	RFQ
A	SKLC3608L5XX	800	Miniature Circuit Breaker	-	RFQ
A	SKLC3608L7XX	800	Miniature Circuit Breaker	-	RFQ
A	SKLC3612L3XX	1200	Miniature Circuit Breaker	-	RFQ
A	SKLC3612L4XX	1200	Miniature Circuit Breaker	-	RFQ
A	SKLC3612L5XX	1200	Miniature Circuit Breaker	-	RFQ

GENERAL ELECTRIC -

SGLB Frame Circuit Breaker

Style	Model	Amps
A	SGLB36BB0400	400	RFQ
B	SGLB36BC0400	400	RFQ
B	SGLB36BB0600	600	RFQ

GENERAL ELECTRIC -

SGLL Frame Circuit Breaker

Style	Model	Item	Price (inc. GST)
A	SGLL3606L4XX	Bolt On Circuit Breaker	-	RFQ
A	SGLL3604L3XX	Miniature Circuit Breaker	-	RFQ
A	SGLL3604L4XX	Miniature Circuit Breaker	SGD 8710.78	RFQ

GENERAL ELECTRIC -

TEB Frame Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	TEB111010	10	1	120	SGD 432.70	RFQ
B	TEB122015WL	15	2	240	SGD 698.92	RFQ
A	TEB111015	15	1	120	SGD 432.70	RFQ
B	TEB122020WL	20	2	240	-	RFQ
A	TEB111020	20	1	120	SGD 432.70	RFQ
A	TEB111025	25	1	120	SGD 484.11	RFQ
B	TEB122025WL	25	2	240	-	RFQ
A	TEB111030	30	1	120	SGD 484.11	RFQ
B	TEB122030WL	30	2	240	-	RFQ
B	TEB122035WL	35	2	240	-	RFQ
A	TEB111040	40	1	120	-	RFQ
B	TEB122040WL	40	2	240	-	RFQ
B	TEB122045	45	2	240	SGD 698.92	RFQ
B	TEB122045WL	45	2	240	-	RFQ
A	TEB111050	50	1	120	SGD 484.11	RFQ
B	TEB122050WL	50	2	240	-	RFQ
A	TEB111060	60	1	120	SGD 484.11	RFQ
B	TEB122060WL	60	2	240	-	RFQ
B	TEB122Y100	100	2	240	SGD 868.63	RFQ

SQUARE D -

MJP Series, Circuit Breaker

Style	Model	Amps
A	MJP36600	600	RFQ
A	MJP36800	800	RFQ

GENERAL ELECTRIC -

TKM Frame Circuit Breaker

Style	Model	Amps
A	THKMA836400WL	400	RFQ
A	TKMA836600WL	600	RFQ
A	THKMA31000WL	1000	RFQ

SIEMENS -

BG Series, Bolt On Circuit Breaker

Style	Model	Amps	Frame Type	Number Of Poles	Price (inc. GST)
A	BG2B015	15	BQ	2	SGD 291.52
B	BG3B015	15	BQ	3	SGD 440.33
C	BG220	20	B	2	SGD 173.77
B	BG3B020	20	BQ	3	SGD 561.82	RFQ
B	BG3B030	30	BQ	3	SGD 440.33
A	BG2B030	30	BQ	2	-	RFQ
C	BG215	60	B	2	SGD 173.77
C	BG230	60	B	2	SGD 173.77
D	BG320	60	B	2	SGD 212.47
D	BG315	60	B	2	SGD 212.47
D	BG330	60	B	2	SGD 212.47

SIEMENS -

BA Series, Bolt On Circuit Breaker

Style	Model	Frame Type	Price (inc. GST)
A	BA120AF	B	SGD 316.17
A	BA120AFC	B	SGD 271.51
A	BA120AFCH	BA	SGD 284.11
A	BA120AFCHH	BA	SGD 580.62
A	BA120AFH	BA	SGD 336.73

SIEMENS -

B Series, Bolt On Circuit Breaker

Style	Model	Amps	Frame Type	Number Of Poles	Voltage	Price (inc. GST)
A	B215AFH	15	B	2	240V	SGD 348.79
B	B215	15	B	2	240V	SGD 67.20
C	B315	15	B	3	240V	SGD 189.25
D	B31500S01	15	B	3	240V	SGD 425.40
E	B315H	15	B	3	240V	SGD 1511.75
C	B315H00S01	15	B	3	240V	SGD 580.62
C	B315HH	15	B	3	240V	SGD 455.25
F	B11500S01	15	B	1	120/240V	SGD 290.19
G	BA115AF	15	BA	1	120V	SGD 255.92
G	BA115AFC	15	BA	1	120V	SGD 271.51
G	BA115AFCH	15	BA	1	120V	SGD 316.17
G	B215AF	15	B	2	240V	SGD 240.77
G	B215AFC	15	B	2	240V	SGD 369.13
B	B215HH	15	B	2	240V	SGD 267.19
G	B115DFH	15	B	1	120V	-	RFQ
H	B115HH	15	B	1	120V	SGD 98.93
I	B21500S01	15	B	2	240V	SGD 336.73
H	B115H	15	B	1	120V	SGD 48.18
B	B215H	15	B	2	240V	SGD 139.17
G	B115AF	15	B	1	120V	-	RFQ
I	B215H00S01	15	B	2	240V	SGD 385.05
G	B115DF	15	B	1	120V	SGD 413.35
B	B215HID	15	B	2	240V	SGD 134.42
H	B115HID	15	B	1	120V	SGD 43.32
H	B120HH	20	B	1	120V	SGD 98.93

GENERAL ELECTRIC -

TMQV Frame Circuit Breaker

Style	Model	Amps	Number Of Poles	Price (inc. GST)
A	TMQV22200MM	-	-	SGD 1249.05
A	TMQV22100MM	100	2	SGD 1249.05
B	TMQV32100	100	3	SGD 1589.35
A	TMQV22125MM	125	2	-	RFQ
B	TMQV32125	125	3	SGD 1589.35
A	TMQV22150MM	150	2	SGD 1249.05
B	TMQV32175	175	3	SGD 1589.35
B	TMQV32200	200	3	SGD 1589.35
B	TMQV32225	225	3	SGD 1589.35
A	TMQV22225MM	225	2	-	RFQ

GENERAL ELECTRIC -

TMQD Frame Circuit Breaker

Style	Model	Amps	Item	Number Of Poles	Price (inc. GST)
A	TMQD22070	-	Miniature Circuit Breaker	-	SGD 1458.89	RFQ
B	TMQD32070	70	Miniature Circuit Breaker	3	-	RFQ
A	TMQD22150	150	Bolt On Circuit Breaker	2	SGD 1803.61	RFQ

GENERAL ELECTRIC -

THQC Frame Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	TQC2105WL	5	2	240	SGD 67.20	RFQ
A	TQC2110WL	5	2	240	SGD 67.20
A	TQC32010WL	10	3	240	SGD 230.82
A	THQC2115WL	15	2	240	SGD 62.55
B	THQC1115GFT	15	1	120	SGD 220.10	RFQ
B	THQC1115GF	15	1	120	-	RFQ
B	THQC1120GFT	20	1	120	SGD 220.10	RFQ
C	THQC2120WL	20	2	240	SGD 62.55
D	THQC2125WL	25	2	240	SGD 69.41
E	THQC2130CC	30	2	240	SGD 79.58	RFQ
F	THQC2130WL	30	2	240	SGD 62.55
B	THQC1130GFT	30	1	120	SGD 220.10	RFQ
D	THQC2135WL	35	2	240	SGD 69.41
G	THQC32045WL	45	3	240	SGD 153.21	RFQ
H	THQC2145WL	45	2	240	SGD 69.41
E	THQC2150CC	50	2	240	SGD 107.00	RFQ
I	THQC2160CC	60	2	240	SGD 107.00	RFQ
A	THQC2190WL	90	2	240	-	RFQ
G	THQC32090WL	90	3	240	SGD 216.01	RFQ
A	THQC21100WL	100	2	240	-	RFQ

GENERAL ELECTRIC -

THJK Frame Circuit Breaker

Style	Model	Amps
A	THJK636350WL	350	RFQ
B	THJK636F000	600	RFQ

GENERAL ELECTRIC -

TEC Frame Circuit Breaker

Style	Model	Amps
A	TEC26003	3	RFQ
A	TEC26007	7	RFQ

GENERAL ELECTRIC -

TJK Frame Circuit Breaker

Style	Model	Amps	Number Of Poles
A	THJK436150WL	150	3	RFQ
B	THJK426F000	400	2	RFQ

GENERAL ELECTRIC -

TFK Frame Circuit Breaker

Style	Model	Amps
A	TFK236070WL	70	RFQ
A	THFK236125WL	125	RFQ

GENERAL ELECTRIC -

TFJ Frame Circuit Breaker

Style	Model	Amps	Price (inc. GST)
A	TFJ224150	150	-	RFQ
A	TFJ224150WL	150	-	RFQ
A	TFJ224200	200	SGD 3879.76	RFQ
A	TFJ224200WL	200	-	RFQ
A	TFJ224225	225	-	RFQ

GENERAL ELECTRIC -

TEL Frame Circuit Breaker

Style	Model	Amps
A	TEL136050WL	50	RFQ
A	TEL136125WL	125	RFQ

GENERAL ELECTRIC -

TED Frame Circuit Breaker

Style	Model	Amps	Number Of Poles	Voltage	Price (inc. GST)
A	TED124YT100	-	-	-	SGD 918.60	RFQ
B	TED134010WL	10	3	480	SGD 954.97
C	THED113015	15	1	277	SGD 484.11	RFQ
B	THED136015WL	15	3	600	-	RFQ
B	TED136015WL	15	3	600	-	RFQ
B	TED134015WL	15	3	480	SGD 1130.65
B	TED134020WL	20	3	480	SGD 1130.65
B	TED134025WL	25	3	480	SGD 1146.79
B	TED134030WL	30	3	480	SGD 1130.65
B	TED134035WL	35	3	480	SGD 1146.79
B	TED134040WL	40	3	480	SGD 1130.65
C	TED113040	40	1	277	SGD 432.70	RFQ
B	TED134045WL	45	3	480	SGD 1146.79
B	TED134050WL	50	3	480	SGD 1130.65
B	TED134060WL	60	3	480	SGD 1130.65
A	THED124060WL	60	2	480	-	RFQ
A	THED124070WL	70	2	480	SGD 1407.15
B	THED136070WL	70	3	600	SGD 1934.06
B	TED134070ST12	70	3	480	-	RFQ
B	TED134070WL	70	3	480	SGD 1349.33
B	TED134080WL	80	3	480	SGD 1349.33
C	TED113080	80	1	277	SGD 463.88	RFQ
A	THED124080WL	80	2	480	SGD 1407.15
C	TED113090	90	1	277	SGD 463.88	RFQ
B	TED134090WL	90	3	480	SGD 1349.33

1...8910...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

SGLC Frame Circuit Breaker

SKHC Frame Circuit Breaker

SKLC Frame Circuit Breaker

SGLB Frame Circuit Breaker

SGLL Frame Circuit Breaker

TEB Frame Circuit Breaker

MJP Series, Circuit Breaker

TKM Frame Circuit Breaker

BG Series, Bolt On Circuit Breaker

BA Series, Bolt On Circuit Breaker

B Series, Bolt On Circuit Breaker

TMQV Frame Circuit Breaker

TMQD Frame Circuit Breaker

THQC Frame Circuit Breaker

THJK Frame Circuit Breaker

TEC Frame Circuit Breaker

TJK Frame Circuit Breaker

TFK Frame Circuit Breaker

TFJ Frame Circuit Breaker

TEL Frame Circuit Breaker

TED Frame Circuit Breaker

Molded Case Circuit Breakers

Working Mechanism

Features

Frequently Asked Questions

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