Molded Case Circuit Breakers - Page 7 | Raptor Supplies Singapore

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

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
CSHJD69300300A
RFQ
BSHJD69300G300A
RFQ
CSHJD69300NGT300A
RFQ
CSHJD69300NT300A
RFQ
DSHJD69400400A
RFQ
BSHJD69400G400A
RFQ
BSHJD69400H400A
RFQ
CSHJD69400NGTH400A
RFQ
ESHJD69400NT400A
RFQ
SIEMENS -

SHLD Series Bolt On Molded Case Circuit Breakers

Siemens SHLD Series circuit breakers are designed for protecting electrical equipment against short-circuit and current overload conditions. These UL-listed breakers feature a bolt-on mounting design to ensure ease-of-installation in compact spaces and a thermal-magnetic trip for delivering long-time and instantaneous current limiting functions. Choose from a wide range of these bolt-on circuit breakers, available in 500 and 600A current ratings on Raptor Supplies.

StyleModelAmps
ASHLD69500500A
RFQ
BSHLD69500G500A
RFQ
CSHLD69500NGT500A
RFQ
CSHLD69500NT500A
RFQ
CSHLD69600600A
RFQ
BSHLD69600G600A
RFQ
DSHLD69600NGT600A
RFQ
ESHLD69600NT600A
RFQ
SIEMENS -

SHMD Series Bolt-On Molded Case Circuit Breakers

Siemens SHMD Series circuit breakers are designed to protect the sensitive circuits from excessive current flows causing overloads or short circuits. These circuit breakers feature LI (long time and Instantaneous trip) functions for current limiting protection and are equipped with solid state protection mechanisms to electronically control the current flow and to provide an advance safety for appliances. These UL-listed circuit breakers provide a maximum current rating of 800A at an interrupting capacity of 65kA at 480VAC.

SIEMENS -

SHND Series Bolt-On Molded Case Circuit Breakers

Siemens SHND Series circuit breakers are used for providing protection against current overloads and short-circuit conditions in control panels, switchboards and motor control centres. These UL-listed breakers feature a bolt-on mounting design ensuring smooth installation in compact spaces and LI (long time and instantaneous) current limiting function at a maximum interrupt capacity of 65kA at 480VAC.

StyleModelAmps
ASHND69100A1000A
RFQ
BSHND69100ANGT1000A
RFQ
CSHND69100ANT1000A
RFQ
DSHND69120ANGT1200A
RFQ
ESHND69120ANGTH1200A
RFQ
FSHND69120ANT1200A
RFQ
GSHND69120A1200A
RFQ
SIEMENS -

SJD Series Bolt-On Molded Case Circuit Breakers

Siemens SJD Series circuit breakers are designed for reducing risks of damage caused by faulty current supplies and fatal electrical shocks. These devices are calibrated at an ambient temperature of 40 degrees C and feature a bolt-on mounting design which can accommodate aluminium and copper wires of different sizes. They are capable of delivering a maximum current rating of 400A at an interrupt capacity of 35kA at 480VAC.

StyleModelAmpsPrice (inc. GST)
ASJD69200200A-
RFQ
BSJD69200G200A SGD 7487.10
ASJD69200NGT200A-
RFQ
CSJD69200NT200A SGD 6430.52
ASJD69300300A-
RFQ
DSJD69300G300A-
RFQ
ASJD69300NGT300A-
RFQ
ESJD69300NT300A-
RFQ
BSJD69400400A-
RFQ
FSJD69400G400A-
RFQ
GSJD69400NGT400A-
RFQ
BSJD69400NGTH400A-
RFQ
BSJD69400NT400A-
RFQ
SIEMENS -

SLD Series 3 Pole Circuit Breakers

Siemens bolt on circuit breakers protect electrical circuits & connected equipment against short circuits & flow of high magnitude currents for manufacturing facilities, processing plants & power distribution applications. These solid state breakers are ideal for reverse feed operations and feature 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 ease-of-wiring while eliminating loose connections. SLD frame molded case circuit breakers are available in 500 & 600A current ratings on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
ASLD69500500A-
RFQ
BSLD69500G500A-
RFQ
CSLD69500NGT500A SGD 8635.04
DSLD69500NT500A-
RFQ
DSLD69600600A-
RFQ
DSLD69600G600A-
RFQ
DSLD69600NGT600A-
RFQ
ESLD69600NT600A-
RFQ
SIEMENS -

SMD Series 3 Pole Circuit Breakers

Siemens SMD Series circuit breakers are designed for limiting let-through current for protecting downstream components in power distribution applications. These molded case circuit breakers feature a bolt-on design for ease-of-installation & wiring, and solid state components for long-term durability & quick response against faulty currents. Selected models feature short time, instantaneous & long time trip functions for reacting against severe short-circuits at once while avoiding tripping on mild overloads. These 3 pole, 800A circuit breakers are available on Raptor Supplies.

StyleModelPrice (inc. GST)
ASMD69800A-
RFQ
ASMD69800AG-
RFQ
ASMD69800AH-
RFQ
BSMD69800ANGT-
RFQ
ASMD69800ANGTH SGD 15263.25
CSMD69800ANT-
RFQ
SIEMENS -

HEB Series Circuit Breakers

Siemens HEB Series circuit breakers are designed to protect an electrical circuit from overcurrent occurrences; ideal for use with switchboards, lighting systems and power panels. These devices feature a thermal magnetic trip for providing both instantaneous and long time current limiting protection and a low-tab design with bolt-on mounting facility for ease-of-installation. They are further integrated with load-side lugs to accommodate copper and aluminium wiring arrangements. Choose from a wide range of these HEB Series bolt-on circuit breakers available in amperage ratings ranging from 15 to 125A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AHEG3B015L15A-
RFQ
BHEG3B020L20A SGD 3404.70
CHEG3B025L25A-
RFQ
CHEG3B030L30A-
RFQ
CHEG3B040L40A-
RFQ
DHEG3B050L50A SGD 3404.70
CHEG3B060L60A-
RFQ
CHEG3B070L70A-
RFQ
CHEG3B090L90A-
RFQ
CHEG3B100L100A-
RFQ
EHEG3B125L125A-
RFQ
SIEMENS -

HEM Series Circuit Breakers

StyleModelAmps
AHEM3M003L3A
RFQ
BHEM3M007L7A
RFQ
BHEM3M015L15A
RFQ
BHEM3M030L30A
RFQ
CHEM3M050L50A
RFQ
BHEM3M100L100A
RFQ
SIEMENS -

Circuit Breakers, HND Series

Siemens HND circuit breakers are used to protect the sensitive circuits from excessive current flows causing overloads or short circuits. These devices come with a thermal-magnetic trip mechanism that avoids tripping on mild overloads but instantly responds against severe power surges. They feature line- and load-side lug terminals with feed-thru connection design for ease-of-installation in cramped spaces. Choose from an extensive range of these units available in current ratings ranging from 900 to 1200A, on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AHND63B900900A-
RFQ
BHND63B1001000A SGD 13012.66
CHND63B1201200A SGD 13012.66
AHND63F1201200A-
RFQ
SIEMENS -

Molded Case Circuit Breakers: HRD Series

Siemens HRD Series circuit breakers are designed for reducing risks of damages caused by faulty currents and fatal electrical shocks. These units feature a non-interchangeable trip unit delivering both long time and instantaneous (LI) current limiting functionalities and feed-thru mounting facility for ease-of-installation in cramped spaces. They are further integrated with box lug terminals for secure wiring configuration and are available in amperage ratings of 1600A, 1800A and 2000A on Raptor Supplies.

StyleModelAmpsPrice (inc. GST)
AHRD63B1601600A SGD 16772.53
AHRD63B1801800A SGD 16772.53
BHRD63F2002000A-
RFQ
BHRD63B2002000A-
RFQ
SIEMENS -

Circuit Breaker: LMD Series

StyleModelAmpsPrice (inc. GST)
ALMD63B500500A-
RFQ
BLMD63B600600A SGD 7469.22
CLMD63B700700A SGD 7469.22
DLMD63B800800A SGD 7469.22
ELMD63F800800A-
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)
ANEG3B015L15A SGD 1912.62
BNEG3B020L20A SGD 1912.62
CNEG3B025L25A SGD 2012.89
DNEG3B030L30A SGD 1912.62
ENEG3B040L40A SGD 1912.62
FNEG3B045L45A-
RFQ
GNEG3B050L50A SGD 1912.62
FNEG3B060L60A-
RFQ
FNEG3B070L70A-
RFQ
HNEG3B080L80A-
RFQ
FNEG3B090L90A-
RFQ
FNEG3B100L100A-
RFQ
FNEG3B125L125A-
RFQ
SQUARE D -

FI Series Molded Case Circuit Breakers

StyleModelAmpsVoltagePrice (inc. GST)
AFI3602020A600V SGD 3593.86
AFI3603030A600V SGD 3593.86
BFI3604040600 SGD 3593.86
RFQ
CFI3605050A600V-
RFQ
AFI3606060A600V-
RFQ
AFI3607070A600V-
RFQ
AFI3608080A600V-
RFQ
AFI3609090A600V-
RFQ
DFI36100100A600V-
RFQ
SQUARE D -

PEF Series Bolt-On Molded Case Circuit Breaker

Square D PEF Series circuit breakers are specially designed to provide industrial and commercial circuit protection against damages caused by overload and short-circuit conditions. These UL-listed devices feature a unique MicroLogic non-interchangeable trip for delivering long-time, short-time & instantaneous current limiting actions. They are integrated with a bolt-on mounting design to ensure ease-of-installation in cramped spaces and provide current ratings up to 2500A at a maximum interrupt capacity of 100kA at 480VAC.

StyleModelAmps
APEF361200LI1200A
RFQ
APEF361200LSG1200A
RFQ
APEF361200LS1200A
RFQ
APEF361600LIG1600A
RFQ
APEF361600LI1600A
RFQ
APEF361600LS1600A
RFQ
APEF361600LSG1600A
RFQ
APEF362000LIG2000A
RFQ
APEF362000LS2000A
RFQ
APEF362000LSG2000A
RFQ
APEF362000LI2000A
RFQ
APEF362500LI2500A
RFQ
APEF362500LS2500A
RFQ
APEF36250LSG2500A
RFQ
SQUARE D -

FHL Series Molded Case Circuit Breakers

Square D FHL Series circuit breakers are ideal for applications demanding high interrupting capacities for protecting electrical circuits against short circuits and current overloads. These molded case circuit breakers feature a thermal-magnetic trip unit that delivers both long-time and instantaneous current limiting functions for instantly reacting against severe short-circuits while avoiding tripping on mild overloads. They are further integrated with unit mounting facility and load- and line-side lug terminals for reducing the installation and wiring downtime, respectively. Choose from a wide range of these feed-thru circuit breakers available in double & triple pole configurations on Raptor Supplies.

StyleModelAmpsFrame TypeNumber Of PolesVoltagePrice (inc. GST)
AFHP3603015M-----
RFQ
BFHL3601513M15FHL3600-
RFQ
CFHL3601515AFHL3600V-
RFQ
DFHL2601515AFHL2600V-
RFQ
AFHP3602020F hp3600-
RFQ
EFHL3602020AFHL3600V SGD 1455.90
FFHL2602020AFHL2600V-
RFQ
EFHL3602525AFHL3600V-
RFQ
BFHL36100-121230FHL3600-
RFQ
BFHL36030-121230FHL3600 SGD 1737.72
RFQ
GFHL3603030AFHL3600V SGD 1455.90
HFHL2603030AFHL2600V SGD 1264.64
AFHP3603535F hp3600-
RFQ
IFHL2603535FHL2600 SGD 1264.64
RFQ
JFHL3603535AFHL3600V-
RFQ
EFHL3604040AFHL3600V SGD 1746.23
KFHL2604040AFHL2600V-
RFQ
LFHL3604545AFHL3600V-
RFQ
BFHL36050-121250FHL3600 SGD 1737.72
RFQ
KFHL2605050AFHL2600V-
RFQ
EFHL3605050AFHL3600V SGD 1746.23
EFHL3606060AFHL3600V SGD 1925.88
MFHL2606060AFHL2600V SGD 1264.64
BFHL36070-112170FHL3600-
RFQ
KFHL2607070AFHL2600V-
RFQ
SQUARE D -

Molded Case Circuit Breakers: FDA Series

Square D FDA Series circuit breakers are ideal 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 40 to 100A on Raptor Supplies.

StyleModelAic RatingAmpsVoltagePrice (inc. GST)
AFDA3404018kAIC@480V40A480V-
RFQ
BFDA3405018kAIC@480V50A480V-
RFQ
AFDA3406018kAIC@480V60A480V-
RFQ
CFDA3410018kAIC@480V100A480V-
RFQ
CFDA3205025kAIC@240V50A240V-
RFQ
CFDA3210025kAIC@240V100A240V SGD 1603.50
RFQ
SQUARE D -

ECB Series Bolt On Miniature Circuit Breakers

Square D ECB Series circuit breakers are ideal for use on circuits feeding high intensity discharge lighting & fluorescent systems, ensuring protection from faulty currents. These UL-listed circuit breakers feature bolt-on mounting design to ensure ease of installation in cramped spaces. They provide current ratings up to 30A and deliver interrupt capacity of 14kA at 480VAC. Choose from an extensive range of these single / double pole circuit breakers on Raptor Supplies.

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AECB34015G3153480 SGD 1455.90
BECB14015G315A1277V SGD 484.99
CECB24015G315A2480V SGD 1154.86
DECB14020G3EL201277-
RFQ
DECB142020G3EL201480 SGD 430.49
AECB34020G3203480 SGD 1455.90
BECB14020G320A1277V SGD 384.50
EECB24020G320A2480V SGD 1154.86
BECB14030G330A1277V SGD 384.50
FECB24030G330A2480V SGD 1154.86
SQUARE D -

Molded Case Circuit Breakers, QGP Series

Square D QGP Series molded case circuit breakers are designed to protect electrical circuits and equipment from excessive currents. These QGP Series MCCBs have a thermal-magnetic trip to prevent short circuits. They feature a bolt-on connection for ease of installation and maintenance. These MCCBs offer an interrupt rating of 65kAIC at 240V and come with a QGP-type frame for enhanced protection from dust & debris.

StyleModelAmpsNumber Of PolesPrice (inc. GST)
AQGP32070TM70A3 SGD 3246.38
AQGP32100TM100A3 SGD 3246.38
BQGP22125TM125A2 SGD 2008.69
CQGP22150TM150A2 SGD 2008.69
AQGP32150TM150A3 SGD 3246.38
DQGP22200TM200A2 SGD 2008.69
EQGP32200TM200A3 SGD 3246.38
FQGP32225TM225A3 SGD 3246.38
SQUARE D -

Molded Case Circuit Breakers, QDP Series

Square D QDP Series circuit breakers protect industrial machinery and equipment from damages caused by short-circuit and overload occurrences. They feature a non-interchangeable, thermal magnetic trip unit which provides both long time and instantaneous trip functions. These circuit breakers feature a QDP frame with a maximum interrupting capacity of 25kA at 480V and bolt on mounting capability which ensures faster installation & repairs. They come equipped with load side lugs which can accommodate aluminium and copper wires of sizes ranging from 4 AWG to 300kmcil. QDP Series circuit breakers are available in 2 and 3 pole variants on Raptor Supplies.

StyleModelAmpsNumber Of PolesPrice (inc. GST)
AQDP32070TM70A3 SGD 1925.88
BQDP22100TM100A2 SGD 1358.61
CQDP32100TM100A3 SGD 1925.88
BQDP22110TM110A2 SGD 1358.61
DQDP22125TM125A2 SGD 1358.61
EQDP32125TM125A3 SGD 1925.88
FQDP32150TM150A3 SGD 1925.88
GQDP22175TM175A2 SGD 1358.61
HQDP22200TM200A2 SGD 1713.95
FQDP32200TM200A3 SGD 2008.69
GQDP22225TM225A2 SGD 1358.61
SQUARE D -

PXF Series Bolt-On Molded Case Circuit Breakers

Square D PXF Series circuit breakers are specially designed to provide electric circuit protection against damages caused by overload and short-circuit conditions. These UL-listed devices feature a unique MicroLogic non-interchangeable trip for delivering both long-time and instantaneous current limiting functions. They are integrated with a bolt-on mounting design to ensure ease-of-installation in compact spaces and provide current ratings up to 2500A at a maximum interrupt capacity of 100kA at 480VAC.

StyleModelAmpsVoltagePrice (inc. GST)
APXF3612001200A600V-
RFQ
APXF361200G1200A600V-
RFQ
BPXF3616001600600-
RFQ
APXF361600G1600A600V-
RFQ
APXF3620002000A600V-
RFQ
APXF362000G2000A600V SGD 45804.30
RFQ
APXF3625002500A600V SGD 60998.63
RFQ
APXF362500G2500A600V SGD 76341.13
RFQ
1...678...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.