Molded Case Circuit Breakers - Page 6 | Raptor Supplies Australia

Molded Case Circuit Breakers

Filter

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 -

PGA Series Molded Case Circuit Breakers

Square D PGA Series circuit breakers are designed for use with panelboards and loadcentres for protecting electrical circuits from short-circuit and current overload conditions. These breakers feature I-Line style plug-in mounting facility for ease-of-installation and are suitable for reverse-feed applications. They come equipped with line- and load-side lug terminals to accommodate wires (copper / aluminium) of sizes ranging between 500 kcmil and 3 AWG. These breakers, with 3-pole configuration, are capable of delivering a maximum interrupting capacity of 35kA at 480V and adheres to UL, CSA and IEC standards. Choose from a wide range of these circuit breakers available in current ratings ranging from 600 to 1200A on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
APGA36040U43A400600-
RFQ
BPGA36060U43A600A600V-
RFQ
CPGA36080CU31A800600-
RFQ
CPGA36080CU33A800600-
RFQ
BPGA36080800A600VA$ 23516.59
DPGA361001000A600VA$ 30921.41
DPGA361201200A600VA$ 30921.41
DPGA36120U41A1200A600VA$ 30921.41
DPGA36120U44A1200A600VA$ 35942.82
SQUARE D -

Molded Case Circuit Breakers, QJL Series

Square D QJL Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short circuit conditions. These units feature a thermal magnetic trip unit to provide both instantaneous and long-time current limiting protection. They come in a molded case which holds current-carrying components, trip devices and other mechanisms in a compact space. They deliver an interrupting capacity of 60kA / 100kA at 240V, with a maximum current rating of 225A. These circuit breakers are UL 489 listed, as well as CSA, ANCE and IEC certified. They come equipped with field-installable handle padlock for locking in On / Off position and are compatible with mechanical interlocks. Choose from a wide range of Square D QJL Series circuit breakers, available in 2 & 3 pole configurations on Raptor Supplies.

StyleModelAic RatingAmpsFrame TypeNumber Of PolesVoltagePrice (inc. GST)
AQJL22250-250QJL2240-
RFQ
BQJL32250-250QJL3240A$ 4670.26
BQJL32175-175QJL3240A$ 3773.04
AQJL22175-175QJL2240A$ 3856.39
CQGL3222565kAIC@240V225AQGL3240VA$ 3114.29
DQJL22100100kAIC@240V100AQJL2240VA$ 2150.82
DQJL22125100kAIC@240V125AQJL2240V-
RFQ
DQJL22150100kAIC@240V150AQJL2240V-
RFQ
DQJL22200100kAIC@240V200AQJL2240V-
RFQ
DQJL22225100kAIC@240V225AQJL2240VA$ 2150.82
EQJL32100100kAIC@240V100AQJL3240V-
RFQ
EQJL32125100kAIC@240V125AQJL3240VA$ 3773.04
EQJL32150100kAIC@240V150AQJL3240VA$ 4670.26
EQJL32200100kAIC@240V200AQJL3240VA$ 3773.04
EQJL32225100kAIC@240V225AQJL3240VA$ 3773.04
SQUARE D -

Molded Case Circuit Breakers, QJA Series

Square D QJA Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short circuit conditions. They feature long-time and instantaneous current limiting trip functions for reacting against severe power surges at once while avoiding tripping on mild overloads. These circuit breakers feature a maximum interrupting capacity of 100kA at 240V and come equipped with a compact QJA type frame for ease-of-installation in constrained panelboards. The load & line side lug terminals enable hassle-free wiring. QJA Series circuit breakers are available in current ratings between 100A & 225A on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
AQJA32100100A240VA$ 6619.96
AQJA32125125A240VA$ 9622.77
AQJA32150150A240VA$ 9622.77
AQJA32175175A240VA$ 9622.77
BQJA222002200240-
RFQ
BQJA222004200240-
RFQ
CQJA222001200A240V-
RFQ
AQJA32200200A240VA$ 9622.77
AQJA32225225A240VA$ 9622.77
SQUARE D -

Molded Case Circuit Breakers, QGL Series

Square D QGL Series circuit breakers are designed for installation within panelboards & loadcentres for protecting electrical circuits against short-circuits & current overloads. These UL-listed circuit breakers feature a non-interchangeable thermal magnetic trip that provides long time & instantaneous functions for reacting against severe short-circuits at once while avoiding tripping on mild overloads. These breakers provide current ratings up to 225A and feature an interrupt capacity of 65kA at 240VAC. Square D QJL series circuit breakers are available in 2 & 3 pole configurations on Raptor Supplies.

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AQGL32070703240A$ 3114.29
RFQ
AQGL32080803240-
RFQ
BQGL3209090A3240V-
RFQ
CQGL22100100A2240VA$ 2150.82
BQGL32100100A3240VA$ 3114.29
CQGL22125125A2240VA$ 2150.82
BQGL32125125A3240VA$ 3114.29
CQGL22150150A2240VA$ 2150.82
BQGL32150150A3240VA$ 3114.29
CQGL22175175A2240VA$ 3273.20
BQGL32175175A3240VA$ 3114.29
DQGL22200LW2002240A$ 1817.55
RFQ
CQGL22200200A2240VA$ 2150.82
EQGL32200200A3240VA$ 3114.29
CQGL22225225A2240V-
RFQ
AQGL322502503240A$ 3493.57
SQUARE D -

Molded Case Circuit Breakers, Thermal Magnetic Trip

Square D QGA Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short circuit conditions. They feature non-interchangeable thermal magnetic trip that provides long time & instantaneous functions for reacting against severe short-circuits at once while avoiding tripping on mild overloads. They feature a 3 pole design with a maximum interrupting capacity of 65kA at 240VAC and QGA type frame for added versatility. QGA Series circuit breakers are available in current ratings ranging between 100A & 225A on Raptor Supplies.

StyleModelAmpsFrame TypeMax. Wire SizeMin. Wire SizeVoltagePrice (inc. GST)
AQGA3207070QGA--240A$ 4152.44
BQGA22070270QGA--240-
RFQ
BQGA221002100QGA--240A$ 2402.75
CQGA221001100AQGA--240VA$ 2402.75
CQGA221004100AQGA--240VA$ 2402.75
DQGA32100100AQGA--240VA$ 4152.44
AQGA32125125QGA--240A$ 4152.44
BQGA221254125QGA--240A$ 2402.75
BQGA221251125QGA--240A$ 2402.75
CQGA221252125AQGA--240VA$ 2402.75
EJDL36150150-4/0 AWG4 AWG-A$ 3273.60
FJDL36150SA150JDL--600A$ 6619.96
CQGA221501150AQGA--240VA$ 2402.75
CQGA221502150AQGA--240VA$ 2402.75
CQGA221504150AQGA--240VA$ 2402.75
DQGA32150150AQGA--240VA$ 4152.44
AQGA32175175QGA--240A$ 4152.44
BQGA221752175QGA--240A$ 2987.83
CQGA221754175AQGA--240VA$ 2987.83
CQGA221751175AQGA--240VA$ 2987.83
AQGE32200200QGE--240-
RFQ
GJDL36200200-350 kcmil3/0 AWG-A$ 3273.60
FJDL36200AALC200JDL--600-
RFQ
BQGA222002200QGA--240A$ 2402.75
DQGA32200200AQGA--240VA$ 4152.44
SQUARE D -

QBA Series Molded Case Circuit Breakers

Square D QBA Series circuit breakers are designed for use with panelboards and loadcentres for protecting electrical circuits from short-circuit and current overload conditions. These UL-listed devices feature I-Line style plug-in design for ease-of-installation, load-side lug terminals for hassle-free wiring and a thermal-magnetic trip for providing both time-delayed and instantaneous current limiting functions. Choose from a wide range of these triple-pole circuit breakers available in amperage ratings ranging from 100A to 225A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AQBA221001100AA$ 1181.31
BQBA32100100AA$ 2261.20
AQBA221002100AA$ 1181.31
AQBA221101110AA$ 1181.31
AQBA221102110A-
RFQ
AQBA221104110AA$ 1181.31
BQBA32110110AA$ 2261.20
AQBA221251125AA$ 1181.31
AQBA221252125AA$ 1181.31
AQBA221254125AA$ 1181.31
AQBA221501150AA$ 1181.31
AQBA221502150AA$ 1181.31
AQBA221504150AA$ 1181.31
BQBA32150150AA$ 2261.20
BQBA32175175AA$ 2261.20
AQBA221754175AA$ 1155.04
AQBA221752175AA$ 1155.04
AQBA221751175AA$ 1155.04
AQBA222004200AA$ 1155.04
AQBA222002200AA$ 1155.04
AQBA222001200AA$ 1155.04
BQBA32200200AA$ 2261.20
AQBA222251225AA$ 1155.04
AQBA222252225AA$ 1155.04
AQBA222254225AA$ 1155.04
SQUARE D -

PJA Series Molded Case Circuit Breakers

Square D PGA Series circuit breakers are designed for installation in panelboards and loadcentres for protecting electrical circuits against short-circuit conditions and current overloads. These UL-listed & CSA-certified breakers feature I-Line style plug-in design for ease-of-installation and an electronic trip for short-time, long-time and instantaneous current limiting functions. They are available in maximum current rating and interrupting capacity of 1200A and 65kA at 480VAC, respectively on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
APJA36025U44AE1ABYP250600-
RFQ
APJA36025CU44A250600-
RFQ
APJA36080U41A800600A$ 32869.48
BPJA36080800A600VA$ 31391.46
CPJA36100U33A1000600A$ 34292.82
CPJA36100U41A1000600A$ 34292.82
DPJA361001000A600VA$ 34292.82
DPJA36100U44A1000A600VA$ 35942.82
CPJA36120U43A1200600A$ 34292.82
DPJA361201200A600VA$ 34292.82
DPJA36120U41A1200A600VA$ 34292.82
DPJA36120U44A1200A600VA$ 38843.93
SQUARE D -

NC Series Molded Case Circuit Breakers

Square D NC Series circuit breakers are ideal for use with panelboards and loadcentres for protecting electrical circuits from short-circuit and current overload conditions. They come integrated with I-Line style plug-in mounting facility for ease-of-installation and are also suitable for reverse-feed applications. The molded cases of these devices hold the current-carrying components, trip devices and other mechanisms within a compact space. These breakers, with 3-pole construction, are capable of delivering a maximum interrupting capacity of 100kA at 480V and adheres to UL, CSA and IEC standards. Choose from a wide range of these NC Series circuit breakers, available in current ratings ranging from 1000 to 1200A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ANC3610001000AA$ 32073.84
RFQ
ANC3612001200AA$ 32073.84
RFQ
SQUARE D -

Micrologic Molded Case Circuit Breakers: LX Series, 3 Pole

Square D LX Series circuit breakers are specially designed to provide circuit protection against damages caused by overload and short-circuit conditions. These devices feature a unique MicroLogic non-interchangeable trip for delivering both long-time and instantaneous current limiting functions and I-Line style plug-in mounting design to ensure ease-of-installation in compact spaces. Choose from an extensive array of these circuit breakers available in amperage ratings of 125A, 250A, 400A and 600A on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
ALX36125G125A600VA$ 10339.65
RFQ
BLX36150G150600-
RFQ
CLX36250250A600V-
RFQ
CLX36250G250A600V-
RFQ
BLX36300G300600-
RFQ
DLX36400400A600V-
RFQ
ALX36400G400A600V-
RFQ
DLX36600600A600V-
RFQ
ALX36600G600A600V-
RFQ
SQUARE D -

MHL Series Molded Case Circuit Breakers

Square D MHL Series circuit breakers are designed for switching AC systems while delivering protection against current overloads & short circuits in manufacturing & storage facilities. These feed-thru circuit breakers feature a thermal-magnetic trip unit for reacting against severe power surges at once while avoiding tripping on mild overloads and deliver a maximum interrupt capacity of 65kA at 480VAC. Choose from a wide range of these triple-pole circuit breakers available in amperage ratings ranging from 300 to 1200A on Raptor Supplies.

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AMHL36300300A3600V-
RFQ
BMHL36350-12123503600A$ 15992.97
RFQ
CMHL36350350A3600VA$ 15828.41
DMHL36400400A3600VA$ 15828.41
EMHL36450450A3600V-
RFQ
FMHL36500500A3600VA$ 15828.41
FMHL36600600A3600V-
RFQ
BMHL36700-10217003600A$ 17560.75
RFQ
FMHL36700700A3600VA$ 17615.19
BMHL268008002600A$ 15828.41
RFQ
BMHL36800-12128003600-
RFQ
FMHL36800800A3600V-
RFQ
BMHL369009003600A$ 24480.82
RFQ
FMHL3610001000A3600VA$ 22621.25
FMHL3612001200A3600V-
RFQ
SQUARE D -

MH Series Molded Case Circuit Breakers

Square D MH Series circuit breakers are designed for installation in panelboards and loadcentres for protecting electrical circuits against short-circuit conditions and current overloads. These UL-listed & CSA-certified breakers feature I-Line style plug-in design for ease-of-installation and a fixed thermal, adjustable AC magnetic trip unit for delivering both time-delayed and instantaneous current limiting functions, respectively.

StyleModelAmpsPrice (inc. GST)
AMH36300300A-
RFQ
BMH36400400A-
RFQ
CMH36450450A-
RFQ
AMH36500500AA$ 17615.19
AMH36600600AA$ 17615.19
AMH36700700AA$ 18580.92
DMH36800800AA$ 18580.92
SQUARE D -

MGA Series Molded Case Circuit Breakers

Square D MGA Series circuit breakers are designed for installation in commercial and industrial electrical devices for protection against overcurrent and short-circuit conditions. These units feature a programmable electronic trip for delivering short-time, long-time and instantaneous current limiting functions and line- and load-side lug terminals to accommodate wires (copper / aluminium) of sizes ranging between 500 kcmil & 3 AWG. They can handle current ratings up to 800A and deliver interrupt capacities of 65kA at 240VAC, 35kA at 480VAC and 18kA at 600VAC.

StyleModelAmpsPrice (inc. GST)
AMGA36300300A-
RFQ
AMGA36350350A-
RFQ
AMGA36400400AA$ 15828.41
AMGA36450450AA$ 15828.41
AMGA36500500AA$ 15828.41
AMGA36600600AA$ 15828.41
AMGA36800800AA$ 15828.41
SQUARE D -

Molded Case Circuit Breakers, ME Series

Square D ME Series molded case circuit breakers provide short-circuit and overload protection to switchboards, panelboards, motor control centers and busways. These 3 pole, 3 phase breakers feature a thermal magnetic trip mechanism that ensures both long-time and instantaneous current limiting protection. They are equipped with lug terminals for accommodating aluminium or copper wires and allow I-Line style plug in mounting to ensure smooth installation in loadcentres. These CSA-certified and UL-listed breakers are available in 250 to 800A current ratings on Raptor Supplies.

StyleModelAmps
AME36250LS250A
RFQ
AME36800LI800A
RFQ
AME36800LS800A
RFQ
AME36800LSG800A
RFQ
SQUARE D -

Molded Case Circuit Breakers, MAL Series

Square D MAL Series circuit breakers are ideal for applications where the rated load currents exceed the capabilities of a miniature circuit breaker. These 3 pole breakers feature a thermal-magnetic trip for providing instantaneous & long-time current limiting protection with two different switching mechanisms - a bimetal switch for handling overcurrents and an electromagnet for handling short circuits. They are equipped with feed-thru connection terminals for easily connecting multiple sections of the circuit and line & load side lug terminals for accommodating aluminium / copper wires. These breakers are available in current ratings ranging from 300A to 1200A on Raptor Supplies.

StyleModelAmpsVoltagePrice (inc. GST)
AMAL36300300A600VA$ 14738.97
BMAL36350350A600VA$ 14738.97
CMAL36400400A600V-
RFQ
DMAL36450450A600V-
RFQ
EMAL36500-1212500600A$ 14855.25
RFQ
CMAL36500500A600VA$ 14738.97
FMAL3660040M600600-
RFQ
FMAL3660033M600600-
RFQ
FMAL36000MV600600-
RFQ
FMAL36600-1021600600-
RFQ
CMAL36600600A600V-
RFQ
FMAL36700700600A$ 15270.36
RFQ
CMAL36800800A600V-
RFQ
GMAL3612001200A600VA$ 17852.91
SQUARE D -

Molded Case Circuit Breakers: LXI Series, 3 Pole, 600V

Square D LXI Series circuit breakers are designed to interrupt circuits exceeding the ambient operating temperature. These devices feature a solid electronic trip unit with current sensors, a Micrologic processor and a trip unit providing instantaneous and time-delayed current limiting functions. They are further integrated with I-Line style plug-in design for ensuring ease-of-installation and load-side lugs for hassle-free wiring. Choose from a broad range of these current limiting breakers available in amperage ratings of 400A and 600A on Raptor Supplies.

StyleModelAmps
ALXI36400G400A
RFQ
ALXI36600600A
RFQ
SQUARE D -

HJL Series Circuit Breakers

Square D HJL Series circuit breakers are suitable for installation within switchboards, motor control centres, panelboards, industrial enclosures and busway plug-in units for protecting connected circuits & equipment against short circuits & faulty currents. These feed-thru circuit breakers feature non-interchangeable thermal magnetic trip for providing both long time & instantaneous trip functions for reacting against severe short-circuits at once while avoiding tripping on mild overloads. They come with load & line side lug terminals for hassle-free wiring & installation. These 2 / 3 pole molded case circuit breakers are available in amperage ratings ranging from 15 to 150A on Raptor Supplies.

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AHJL2601515A2600V-
RFQ
BHJL3601515A3600VA$ 2150.82
CHJL3602020A3600VA$ 2150.82
AHJL2602020A2600V-
RFQ
AHJL2602525A2600VA$ 1904.00
DHJL3602525A3600VA$ 2303.69
EHJL36030M71303600A$ 2073.76
EHJL36030SA303600-
RFQ
BHJL3603030A3600VA$ 2150.82
AHJL2603030A2600VA$ 2018.44
FHJL3603535A3600VA$ 2303.69
AHJL2603535A2600VA$ 1904.00
AHJL2604040A2600V-
RFQ
AHJL2604545A2600VA$ 1904.00
FHJL3604545A3600VA$ 2303.69
EHJL36050M72503600A$ 2148.43
GHJL3605050A3600VA$ 2150.82
AHJL2605050A2600V-
RFQ
EHJL36060U31X603600-
RFQ
EHJL36060U33X603600-
RFQ
EHJL36060U44X603600-
RFQ
BHJL3606060A3600VA$ 2150.82
AHJL2606060A2600VA$ 2018.44
HHJL3607070A3600VA$ 2692.15
AHJL2607070A2600V-
RFQ
SQUARE D -

HDA Series Circuit Breakers

Square D circuit breakers are suitable for limiting the let-through current for protecting downstream components in power distribution applications. These PowerPact circuit breakers feature a non-interchangeable thermal-magnetic trip that provides long-time & instantaneous current limiting functions for reacting against severe power surges at once while avoiding tripping on mild overloads. They are further integrated with I-Line style plug-in design for ensuring ease-of-installation with load-side lug terminals. Choose from a wide range of these double- & triple-phase circuit breakers available in amperage ratings ranging from 15 to 150A on Raptor Supplies.

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AHDA260154152600A$ 2150.82
AHDA260151152600A$ 2150.82
AHDA260152152600A$ 2150.82
BHDA3601515A3600VA$ 2097.89
AHDA260202202600A$ 2150.82
AHDA260204202600A$ 2150.82
AHDA260201202600A$ 2150.82
CHDA3602020A3600VA$ 2097.89
AHDA260252252600A$ 2150.82
AHDA260251252600-
RFQ
AHDA260254252600-
RFQ
CHDA3602525A3600VA$ 2303.69
AHDA260304302600A$ 2150.82
AHDA260301302600A$ 2150.82
AHDA260305302600A$ 2150.82
AHDA260302302600A$ 2150.82
CHDA3603030A3600VA$ 2097.89
DHDA26035435A2600V-
RFQ
CHDA3603535A3600VA$ 2303.69
DHDA26035235A2600VA$ 2150.82
DHDA26035135A2600V-
RFQ
AHDA260401402600A$ 2150.82
AHDA260404402600A$ 2150.82
AHDA260402402600A$ 2150.82
CHDA3604040A3600VA$ 2150.82
SIEMENS -

RXD Series Bolt-On Molded Case Circuit Breakers

Siemens RXD Series circuit breakers are ideal for protecting electrical circuits and machinery against current overloads and short circuits. These devices feature a thermal-magnetic trip mechanism that delivers 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.

StyleModel
ARXD63B200
RFQ
BRXD63S200A
RFQ
SIEMENS -

Molded Case Circuit Breakers, NEG Series

Siemens NEG Series circuit breakers are ideal for switchboards, power distribution panelboards and enclosures for overload protection. They feature a thermal-magnetic, non-interchangeable trip overriding mild overloads while instantly reacting to severe current spikes for maximum current limiting protection. They feature feed-thru connection and load side lug terminals for ease of installation and secure wiring configuration. These circuit breakers have a maximum interrupting capacity of 35kA at 480V and are ideal for reverse feed applications. NEG Series circuit breakers are available in current ratings from 15A to 125A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ANEG3B015L15AA$ 2193.81
BNEG3B020L20AA$ 2193.81
CNEG3B025L25AA$ 2308.47
DNEG3B030L30AA$ 2193.81
ENEG3B040L40AA$ 2193.81
FNEG3B045L45A-
RFQ
GNEG3B050L50AA$ 2193.81
FNEG3B060L60A-
RFQ
FNEG3B070L70A-
RFQ
HNEG3B080L80A-
RFQ
FNEG3B090L90A-
RFQ
FNEG3B100L100A-
RFQ
FNEG3B125L125A-
RFQ
SIEMENS -

SCND Series Bolt-On Molded Case Circuit Breakers

Siemens SCND Series circuit breakers are specially designed to provide electric circuit protection against damages caused by overloads and short-circuit conditions. These devices are calibrated at an ambient temperature of 40 degrees C and feature a non-interchangeable trip capable of resisting mild overloads while instantly responding to severe current surges. They are further integrated with a bolt-on mounting design to ensure ease-of-installation in compact spaces and deliver a maximum interrupt capacity of 65kA at 480VAC. Choose from an extensive array of these circuit breakers available in 800 and 1200A current ratings on Raptor Supplies.

StyleModelAmps
ASCND69800ANGT800A
RFQ
BSCND69120ANGT1200A
RFQ
BSCND69120ANGTH1200A
RFQ
SIEMENS -

SHJD Series Bolt On Molded Case Circuit Breakers

Siemens SHJD Series circuit breakers are designed for providing protection against overloads and short-circuit conditions to prevent electrical hazards. These devices feature a thermal-magnetic trip for delivering both long-time and instantaneous current limiting functions and a bolt-on mounting facility for compatibility with panelboards and switchboards. They are further integrated with solid-state protection mechanisms to electronically control the current flow and provide advance safety for sensitive appliances. These UL-listed breakers provide a maximum current rating of 400A at an interrupt capacity of 35kA at 480VAC.

StyleModelAmps
ASHJD69200200A
RFQ
BSHJD69200NGT200A
RFQ
BSHJD69300G300A
RFQ
CSHJD69300300A
RFQ
CSHJD69300NGT300A
RFQ
CSHJD69300NT300A
RFQ
DSHJD69400400A
RFQ
BSHJD69400H400A
RFQ
ESHJD69400NT400A
RFQ
BSHJD69400G400A
RFQ
CSHJD69400NGTH400A
RFQ
1...567...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.

Frequently Asked Questions

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.