Molded Case Circuit Breakers - Page 15 | Raptor Supplies Australia

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 -

FB Series Circuit Breakers, Bolt On, Thermal Magnetic Trip

General Electric FB Series circuit breakers are ideal for protecting electrical circuits against excessive currents and prevent current overloads & short circuits. These circuit breakers feature a thermal magnetic trip unit which provides both long time and instantaneous trip functions and bolt-on mounting with lug terminal connections for quick field installation. These UL listed circuit breakers are available in 1, 2 & 3 pole options on Raptor Supplies.

StyleModelAic RatingAmpsFrame TypeNumber Of PolesVoltagePrice (inc. GST)
AFBV36TE050RV10kAIC@480V50AFBV3600VA$ 1753.19
BFBN16TE015RV65kAIC@480V15AFB1277VA$ 380.26
BFBN36TE080RV65kAIC@480V80AFB3600VA$ 2281.56
CFBN36TE070RV65kAIC@480V70AFB3600VA$ 2281.56
BFBN36TE050RV65kAIC@480V50AFB3600VA$ 1969.29
BFBN36TE040RV65kAIC@480V40AFB3600VA$ 1969.29
CFBN36TE025RV65kAIC@480V25AFB3600VA$ 1969.29
BFBN26TE100RV65kAIC@480V100AFB2600VA$ 1241.15
BFBN26TE080RV65kAIC@480V80AFB2600VA$ 1241.15
BFBN26TE060RV65kAIC@480V60AFB2600VA$ 1241.15
BFBN26TE040RV65kAIC@480V40AFB2600VA$ 1241.15
BFBN36TE100RV65kAIC@480V100AFB3600VA$ 2281.56
DFBN36TE060RV65kAIC@480V60AFB3600VA$ 1969.29
BFBN16TE020RV65kAIC@480V20AFB1277VA$ 380.26
BFBN36TE045RV65kAIC@480V45AFB3600VA$ 1969.29
CFBN36TE035RV65kAIC@480V35AFB3600VA$ 1969.29
CFBN36TE030RV65kAIC@480V30AFB3600VA$ 1969.29
CFBN36TE015RV65kAIC@480V15AFB3600VA$ 1969.29
BFBN26TE090RV65kAIC@480V90AFB2600VA$ 1241.15
BFBN26TE070RV65kAIC@480V70AFB2600VA$ 1241.15
BFBN26TE050RV65kAIC@480V50AFB2600VA$ 1241.15
BFBN26TE030RV65kAIC@480V30AFB2600VA$ 1241.15
BFBN26TE020RV65kAIC@480V20AFB2600VA$ 1241.15
BFBN26TE015RV65kAIC@480V15AFB2600VA$ 1241.15
BFBN16TE030RV65kAIC@480V30AFB1277VA$ 380.26
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.

StyleModelAmpsFrame TypeNumber Of PolesPrice (inc. GST)
AFD62B07070FD2-
RFQ
AFXD62B07070FXD2-
RFQ
BFXD63B07070AFXD3-
RFQ
AFXD62B08080FXD2A$ 2352.84
CFD62B08080AFD2-
RFQ
DFXD63B08080AFXD3A$ 2626.90
AFXD62B09090FXD2A$ 2352.84
EFXD63B09090AFXD3-
RFQ
CFD62B09090AFD2-
RFQ
AFXD62B100100FXD2A$ 2352.84
CFD62B100100AFD2-
RFQ
FFXD63B100100AFXD3A$ 2626.90
AFXD62B110110FXD2A$ 2352.84
CFD62B110110AFD2-
RFQ
GFXD63B110110AFXD3A$ 2626.90
AFXD62B125125FXD2A$ 8723.13
HFXD63B125125AFXD3A$ 2626.90
CFD62B125125AFD2-
RFQ
AFXD62B150150FXD2A$ 2352.84
IFXD63L150150FXD3A$ 3045.53
JFXD63B150150AFXD3A$ 2626.90
KFXD63H150150AFXD3A$ 3045.53
CFD62B150150AFD2-
RFQ
LFXD63A150150AFXD3A$ 3280.49
AFXD62B175175FXD2A$ 2352.84
SQUARE D -

Micrologic Circuit Breakers

Square D Micrologic circuit breakers protect against short-circuits & overloads and feature a programmable electronic trip for instantaneous protection against severe overcurrent surges. Selected models have thermal magnetic trip for both long time and instantaneous trip functions. They are equipped with box lug or line & load lug terminals for accommodating wires and panel or plug in mounting style for quick installation. These circuit breakers are available in 1, 2 & 3 pole configurations on Raptor Supplies.

StyleModelAc Voltage RatingAmpsCircuit Breaker TypeDc Voltage RatingDepthFrame SizeHeightMax. Wire SizePrice (inc. GST)
AQDA221101240 VAC110StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 4287.93
BQDA32080240 VAC80StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 4493.06
CQDL32100240 VAC100StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 2258.05
DQDL22250240 VAC250StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 1758.21
DQDL22090240 VAC90StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 2829.81
BQDA32175240 VAC175StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 2701.20
BQDA32150240 VAC150StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 2701.20
BQDA32090240 VAC90StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 3203.80
AQDA221102240 VAC110StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 3895.92
EQ4L2400240 VAC400StandardNot Rated5.8"400A/Q411"600 kcmil (Al), 250 kcmil (Al)A$ 7352.83
FQ4L2350240 VAC350StandardNot Rated3.93"400A/Q46.47"600 kcmil (Al), 250 kcmil (Al)A$ 6887.68
AQDA220904240 VAC90StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 3895.92
GQDA220804240 VAC80StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 2858.63
GQDA220801240 VAC80StandardNot Rated3.93"250A/QD6.47"300 kcmilA$ 3072.33
GQDA220704240 VAC70StandardNot Rated3.93"250A/QD6.5"300 kcmilA$ 3860.01
GQDA220701240 VAC70StandardNot Rated3.93"250A/QD6.5"300 kcmilA$ 3895.92
HQ4L2300240 VAC300StandardNot Rated5.8"400A/Q411"600 kcmil (Al), 250 kcmil (Al)A$ 7075.49
FQ4L2250240 VAC250StandardNot Rated3.93"400A/Q46.47"600 kcmil (Al), 250 kcmil (Al)A$ 7234.48
ILA26350AC600 VAC350Standard250 VDC5.8"400A/LA11"600 kcmil (Al), 250 kcmil (Al)A$ 9987.98
JJGA262501600 VAC250Standard250 VDC5"250A/JG7.5"350 kcmilA$ 14692.50
KJGA261752600 VAC175Standard250 VDC5"250A/JG7.5"4/0 AWGA$ 10931.24
JJGA261754600 VAC175Standard250 VDC5"250A/JG7.5"4/0 AWGA$ 8178.92
JJGA262001600 VAC200Standard250 VDC5"250A/JG7.5"350 kcmilA$ 7406.69
JJGA262002600 VAC200Standard250 VDC5"250A/JG7.5"350 kcmilA$ 7462.28
JJGA262004600 VAC200Standard250 VDC5"250A/JG7.5"350 kcmilA$ 11521.62
StyleModelPrice (inc. GST)
APL DWB160 3PA$ 51.16
APL DWB250A$ 55.90
ABCAL-2 DWBA$ 125.92
ABFR DWB 160 3P ULA$ 19.67
APC DWB250A$ 68.48
AEHX ACW 400A$ 298.87
RFQ
AAL ACW 125-800A$ 77.35
AAL-1 DWBA$ 77.11
RFQ
StyleModelAmpsPrice (inc. GST)
ATHFK236070WL70A-
RFQ
ATHFK236080WL80A-
RFQ
ATHFK236090WL90AA$ 6050.98
RFQ
ATHFK236100WL100AA$ 6050.98
RFQ
ATHFK236110WL110A-
RFQ
ATHFK236150WL150A-
RFQ
ATHFK236175WL175A-
RFQ
ATHFK236200WL200A-
RFQ
ATHFK236225WL225A-
RFQ
ATHFK236F000225A-
RFQ
EATON -

Main Circuit Breakers

StyleModelPrice (inc. GST)
A1MCB1000RA$ 18969.35
B1MHCB400RA$ 10608.82
C3MHCB900RA$ 21206.63
C3MHCB500RA$ 13401.77
C3MHCB700RA$ 18034.68
RFQ
C3MHCB400RA$ 10954.73
C3MHCB300RA$ 9376.12
RFQ
C3MHCB600RA$ 15598.63
C3MHCB1200RA$ 32407.94
C3MHCB350RA$ 10174.67
C3MHCB250RA$ 8842.52
RFQ
C3MHCB1000RA$ 28128.36
RFQ
D1MHCBE1200RC-
RFQ
E1MHCB800RA$ 15131.28
F1MCB1200RA$ 22796.33
A1MHCB1000RA$ 20915.95
F1MHCB1200RA$ 24978.45
G1MHCB600RA$ 12386.18
F1MCB900RA$ 61760.05
E1MCB800RA$ 12783.62
F1MCB700RA$ 43995.95
G1MCB600RA$ 11403.67
F1MCB350RA$ 9681.55
F1MCB250RA$ 8791.02
B1MCB400RA$ 10141.51
StyleModelPrice (inc. GST)
ALGEDC3250FAWA$ 24598.34
ALGEDC3350FAWA$ 24598.34
ALGEDC3350FAG-
RFQ
ALGEDC3500FAW-
RFQ
ALGEDC3600FAW-
RFQ
ALGEDC3500FAG-
RFQ
ALGEDC3300FAWA$ 24598.34
ALGEDC3250FAG-
RFQ
ALGEDC3300FAG-
RFQ
ALGEDC3400FAWA$ 24598.34
ALGEDC3400FAG-
RFQ
ALGEDC3600FAG-
RFQ
StyleModel
ALGHDC3250FAG
RFQ
ALGHDC3250FAW
RFQ
ALGHDC3300FAW
RFQ
ALGHDC3300FAG
RFQ
ALGHDC3350FAW
RFQ
ALGHDC3400FAG
RFQ
ALGHDC3500FAG
RFQ
ALGHDC3400FAW
RFQ
ALGHDC3600FAG
RFQ
ALGHDC3600FAW
RFQ
ALGHDC3350FAG
RFQ
ALGHDC3500FAW
RFQ
EATON -

RGHDC Type DC Complete Circuit Breakers

StyleModel
ARGHDC3160FFWM
RFQ
ARGHDC3160FFWE
RFQ
ARGHDC3250FFWM
RFQ
ARGHDC3200FFWM
RFQ
BRGHDCW3200WM
RFQ
ARGHDC3250FFWE
RFQ
ARGHDC3300FFWE
RFQ
BRGHDCW3160WM
RFQ
BRGHDCW3160WMA12
RFQ
ARGHDC3200FFWE
RFQ
BRGHDCW3250WMA12
RFQ
ARGHDC3300FFWM
RFQ
BRGHDCW3300WMA12
RFQ
BRGHDCW3250WM
RFQ
BRGHDCW3200WMA12
RFQ
BRGHDCW3300WM
RFQ
StyleModel
AGLH325035M
RFQ
AGLH360033M
RFQ
AGLH960032M
RFQ
AGLH763032M
RFQ
AGLH740032M
RFQ
AGLH463036M
RFQ
AGLH460036M
RFQ
AGLH463032M
RFQ
AGLH460032M
RFQ
AGLH440032M
RFQ
AGLH440036M
RFQ
AGLH425032M
RFQ
AGLH363035M
RFQ
AGLH363036M
RFQ
AGLH3600FAM
RFQ
AGLH360035M
RFQ
AGLH325032M
RFQ
AGLH340036M
RFQ
AGLH325036M
RFQ
AGLH940032M
RFQ
AGLH925032M
RFQ
AGLH760032M
RFQ
AGLH725032M
RFQ
AGLH425036M
RFQ
AGLH360036M
RFQ
StyleModelPrice (inc. GST)
ANGC312032B20ZGM-
RFQ
ANGH308039B22E-
RFQ
ANGH308039B20ZGE-
RFQ
ANGH308039B21MC-
RFQ
ANGH308039B20M-
RFQ
ANGH308039B21EC-
RFQ
ANGH308039B20ZGEC-
RFQ
ANGH308039B22EC-
RFQ
ANGH308039B21ZGE-
RFQ
ANGH308039B21M-
RFQ
ANGH308039B21ZGEC-
RFQ
ANGH308039B21ZGMC-
RFQ
ANGH308039B21ZGM-
RFQ
ANGH308039B22ZGEC-
RFQ
ANGH308039B22MC-
RFQ
ANGH308039EC-
RFQ
ANGH308038ZGM-
RFQ
ANGH308039M-
RFQ
ANGH308039B22ZGM-
RFQ
ANGH308039B22M-
RFQ
ANGH308039B22ZGE-
RFQ
ANGH308039MC-
RFQ
ANGH308039B22ZGMC-
RFQ
ANGH312032B20ZGMC-
RFQ
ANGH3100T35WP21-
RFQ
EATON -

GR Series Electronic Molded Case Circuit Breakers, RG Frame

StyleModel
AGRC316T32WP09
RFQ
BGRH325T33WP40
RFQ
BGRH325T32WP40
RFQ
BGRH320T36XWP17
RFQ
BGRH325T36WP38
RFQ
BGRH325T36WP40
RFQ
BGRH325T36XWP40
RFQ
BGRH416T32PWP09
RFQ
BGRH416T33PWP01
RFQ
BGRH325T33WP38
RFQ
BGRH420T32EWP10
RFQ
BGRH416T32WP01
RFQ
BGRH320T36WP17
RFQ
BGRH320T36XWP10
RFQ
BGRH416T32PWP01
RFQ
BGRH325T32WP38
RFQ
BGRH320T33WP10
RFQ
BGRH320T36WP10
RFQ
BGRH320T33WP17
RFQ
BGRH316T36XWP01
RFQ
BGRH320T32WP17
RFQ
BGRH316T33WP01
RFQ
BGRH320T32WP10
RFQ
BGRH316T36XWP09
RFQ
BGRH316T36WP09
RFQ
StyleModelPrice (inc. GST)
ARGC316032B20ZGEC-
RFQ
ARGC316036B20ZGM-
RFQ
ARGC316035B22EC-
RFQ
ARGC316036B20E-
RFQ
ARGC316036B20ZGMC-
RFQ
ARGC316036B20MC-
RFQ
ARGC316036B20M-
RFQ
ARGC316036B20EC-
RFQ
ARGC316036B21EC-
RFQ
ARGC316035B22E-
RFQ
ARGC316036B20ZGEC-
RFQ
ARGC316036B20ZGE-
RFQ
ARGC316036B21M-
RFQ
ARGC316036B21ZGM-
RFQ
ARGC316036B21ZGEC-
RFQ
ARGC316036B21E-
RFQ
ARGC316035MC-
RFQ
ARGC316035B21EC-
RFQ
ARGC316036B22MC-
RFQ
ARGC316035EC-
RFQ
ARGC316035B22MC-
RFQ
ARGC316033MC-
RFQ
ARGC316033M-
RFQ
ARGC316035B20E-
RFQ
ARGC316033B20M-
RFQ
StyleModelPrice (inc. GST)
ALGC325032G-
RFQ
ALGS360033B20GA$ 11353.56
ALGS340039ZGGCA$ 18549.17
ALGS360032B20ZGGC-
RFQ
ALGS360032B20GA$ 14659.27
ALGS360032B20GCA$ 15607.68
ALGS360032GCA$ 15435.85
ALGS360032GA$ 13211.49
ALGS360035B20GCA$ 17958.11
ALGS360032GA2S1A$ 15813.95
ALGS360033B20GCA$ 12095.80
ALGS360033G-
RFQ
ALGS360035B21GC-
RFQ
ALGS360032ZGGA$ 14439.39
ALGS360032WA$ 13779.59
ALGS360033WA$ 10466.97
ALGS340039G-
RFQ
ALGS360033GCA$ 12130.17
ALGS360032ZGGC-
RFQ
ALGS360035B22GC-
RFQ
ALGS360035B22GA$ 14384.38
ALGS360035B20G-
RFQ
ALGS360035B21GA$ 17057.82
ALGS360035G-
RFQ
ALGS360036B20ZGGC-
RFQ
StyleModel
ANHH3175T52X15
RFQ
ANHH3350T52X15
RFQ
ANHH3300T52W
RFQ
ANHH3350T52W
RFQ
ANHH3225T52W
RFQ
ANHH3250T52X15
RFQ
ANHH3200T52X15
RFQ
ANHH3150T52Y15
RFQ
ANHH3175T52W
RFQ
ANHH3150T52W
RFQ
ANHH3300T52Y15
RFQ
ANHH3150T52X15
RFQ
ANHH3225T52Y15
RFQ
ANHH3350T52Y15
RFQ
ANHH3200T52W
RFQ
ANHH3225T52X15
RFQ
ANHH3250T52W
RFQ
ANHH3250T52Y15
RFQ
ANHH3175T52Y15
RFQ
ANHH3200T52Y15
RFQ
ANHH3300T52X15
RFQ
EATON -

BR Series GFCI Circuit Breakers

StyleModelAmpsNumber Of PolesVoltagePrice (inc. GST)
AGFXB115B2---A$ 2583.48
BGFXB132B2---A$ 2065.51
CBRN130GFC---A$ 794.31
DBRN120GF---A$ 171.32
CBRN115EP---A$ 339.15
EBRN115GF---A$ 171.32
EBRN115GFC---A$ 794.31
CBRHN120GF---A$ 2030.06
CBRHN125GF---A$ 2030.06
FGFXB120B2---A$ 2158.41
GBRP120GF---A$ 143.04
HGFTCBH225W1----
RFQ
IGFXB110B2----
RFQ
JGFTCB260---A$ 519.68
HGFTCB240X36----
RFQ
HGFTCBH215---A$ 3327.51
HGFTCB250X36---A$ 1378.63
HGFTCBH230W1---A$ 4893.35
CBRN125EP---A$ 2272.99
CBRP120GFC---A$ 794.31
KGFXB116B2----
RFQ
HGFTCB215X36---A$ 1378.63
HGFTCBH225---A$ 3470.59
HGFTCBH220W1---A$ 4858.78
HGFTCB250----
RFQ
StyleModelPrice (inc. GST)
AGFXBC110B2A$ 2570.23
AGFXBC115B2A$ 2570.23
AGFXBC110B1A$ 2570.23
AGFXBC125B1A$ 2570.23
AGFXBC120B2-
RFQ
AGFXBC115B1-
RFQ
AGFXBC140B2A$ 2856.10
AGFXBC132B1A$ 2464.23
AGFXBC120B1A$ 2570.23
AGFXBC130B1A$ 2570.23
AGFXBC116B1A$ 2570.23
AGFXBC130B2-
RFQ
EATON -

GHQ Series Thermal Magnetic Circuit Breakers

StyleModelFrame TypePrice (inc. GST)
AGHQRDEL2020-A$ 4747.50
BGHQ1030-A$ 313.25
CGHQRSD2030-A$ 5010.37
DGHQRSPEL2015-A$ 4986.99
EGHQRSP1015-A$ 1998.78
FGHQRS2015-A$ 4807.41
AGHQRDEL2015-A$ 4951.61
GGHQRD2015-A$ 5038.35
GGHQRD2020-A$ 5282.14
HGHQRAEL2020-A$ 4951.61
BGHQF1020-A$ 2762.85
BGHQF1015--
RFQ
HGHQ2030-A$ 1325.88
IGHQ1015S-A$ 1568.26
HGHQ2015--
RFQ
HGQ1015-A$ 850.58
GGHQRD2030-A$ 1458.39
DGHQRSPEL2020-A$ 5111.43
JGHQRD1030-A$ 1682.28
JGHQRD1020-A$ 950.37
HGHQ2020-A$ 1325.88
HGHQRAEL2015--
RFQ
JGHQRD1015-A$ 1682.28
KGHQ1015-A$ 313.25
LGHQ1020S-A$ 675.69
StyleModelPrice (inc. GST)
ACL120GFTCSA$ 285.19
ACL115GFTCSA$ 285.19
EATON -

HBAX Series Thermal Magnetic Circuit Breakers

StyleModelPrice (inc. GST)
AHBAX1020A$ 530.29
BHBAX2090A$ 2218.28
BHBAX3060HA$ 2719.10
BHBAX3030HA$ 2719.10
BHBAX2080-
RFQ
BHBAX2070-
RFQ
BHBAX3100HA$ 4595.61
BHBAX2020-
RFQ
BHBAX2025A$ 1051.70
BHBAX2060-
RFQ
BHBAX2040A$ 1092.93
CHBAX1030A$ 603.86
DHBAX1060-
RFQ
EHBAX1055A$ 603.86
BHBAX2030A$ 1092.93
BHBAX2015A$ 1051.70
FHBAX1050A$ 603.86
GHBAX1040A$ 578.99
HHBAX1015A$ 603.86
IHBAX1045A$ 603.86
BHBAX3020HA$ 2719.10
EATON -

Pow-R-Stock Series Main Breaker Kits

StyleModelPrice (inc. GST)
ABKED125B-
RFQ
BBKKD400BA$ 13202.34
CBKHFD175A$ 9799.58
DBKHFD110-
RFQ
EBKHFD100A$ 6702.81
CBKFD200TA$ 8165.85
CBKHFD200A$ 9395.56
CBKHFD125A$ 9395.56
CBKHFD225A$ 9799.58
BBKHKD300A$ 15973.94
BBKHKD400-
RFQ
FBKKD250A$ 12943.97
BBKKD400TA$ 13202.34
CBKFD175A$ 8006.01
GBKLGE500-
RFQ
BBKKD400A$ 12943.97
CBKFD225TA$ 3317.70
CBKHFD150A$ 9799.58
BBKKD300A$ 12943.97
FBKHKD250A$ 15973.94
BBKKD350-
RFQ
GBKLGE400A$ 23497.26
BBKHKD350A$ 15973.94
BBKKD350TA$ 12943.97
CBKHFD225TA$ 8246.97
1...141516...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.