Circuit Breakers

Eaton BR thermal magnetic circuit breaker,Type BR 1-Inch plug-on circuit breaker,20 A,10 kAIC,Single-pole,120/240V,BR,#14-4 AWG Cu/Al,Q1,BR,Type BR loadcenters Molded Case Circuit Breakers
Mini circuit breaker, Homeline, 20A, 1 pole, 120/240VAC, 10kA AIR, standard type, plug in, UL Miniature Circuit Breakers
Multi 9 - C60BP - MCB - 1P - 20 A - C Curve - 277 V - 10 kA - UL 489 Low Voltage Circuit Breakers
Branch Circuit Breaker, GFCI 1-Pole 20A 120V, 10Ka Interrupt Rating GFCI Circuit Breakers
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  • Siemens
Siemens
CIRCUIT BREAKER 10KA, 1POLE, D, 3A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4103-8HG42
UPC: 754554959375
Item #: 1273478
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 2POLE, C, 15A ACC. TO UL 489 - 480Y/277V
MFR: Siemens
MFR #: 5SJ4218-7HG42
UPC: 754554959900
Item #: 1273489
Available to Order
$259.07 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, D, 6A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4106-8HG42
UPC: 754554959580
Item #: 1273483
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, C, 15A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4118-7HG42
UPC: 754554959528
Item #: 1273470
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, C, 10A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4110-7HG42
UPC: 754554959498
Item #: 949112
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
FUSE_DEVICE 5SJ4102-5SJ4102_2,0A_480V
MFR: Siemens
MFR #: 5SJ4102-7HG42
UPC: 754554959467
Item #: 1024736
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, D, 5A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4111-8HG42
UPC: 754554959405
Item #: 1273481
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
Switch_OVERCURRENT 5SJ4206-8HG42-5SJ4206-8HG42_6A_6A_240V
MFR: Siemens
MFR #: 5SJ4206-8HG42
UPC: 754554959962
Item #: 1273492
Available to Order
$279.25 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, C, 8A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4108-7HG42
UPC: 754554959290
Item #: 1024738
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 10KA, 1POLE, C, 1A ACC. TO UL 489 - 277V
MFR: Siemens
MFR #: 5SJ4101-7HG42
UPC: 754554959269
Item #: 1273473
Available to Order
$129.53 each
Availability
Location Available Qty
Siemens
FUSE_DEVICE 5SJ4216-16,0A_480V
MFR: Siemens
MFR #: 5SJ4216-7HG42
UPC: 754554959702
Item #: 1273491
Available to Order
$259.07 each
Availability
Location Available Qty
Siemens
WL Trip Unit ETU776 ETU 776 L(S)(I) WITH GRAPHIC LCD
MFR: Siemens
MFR #: WLETU776
UPC: 783643467255
Item #: 523792
Available to Order
$11646.95 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Miniature Thermal Mag Circuit Breakers - Type QP/MP, 2-Pole, 120/240VAC are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type QP/MP Special Features Non-Automatic Switch Application Electrical Distribution Standard UL 489 Voltage Rating120/240V Amperage Rating 125A Trip Range Thermal Magnetic Interrupt Rating 10 AIC Number Of Poles 2P
MFR: Siemens
MFR #: Q2125S
UPC: 783643974753
Item #: 921379
Available to Order
$773.30 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE SENTRON MOLDED CASE CIRCUIT BREAKER WITH THERMAL - MAGNETICTRIP UNIT. UN-ASSEMBLED STANDARD 40 DEG C BREAKER FD FRAME WITH STANDARD BREAKING CAPACITY. 125A 3-POLE (22KAIC AT 600V) (35KAIC AT 480V). INTERCHANGEABLE TRIPUNIT. SPECIAL FEATURES LINE AND LOAD SIDE LUGS (TA1FD350A) WIRE RANGE 6AWG - 350KCMIL (CU) / 4AWG - 350KCMIL (AL). DIMENSIONS (W x H x D) IN 4.50 x 9.5 x 4.00.
MFR: Siemens
MFR #: FD63B125
UPC: 783643211469
Item #: 54982
Available to Order
$8272.77 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE SENTRON MOLDED CASE CIRCUIT BREAKER WITH THERMAL - MAGNETICTRIP UNIT. ASSEMBLED STANDARD 40 DEG C BREAKER JD FRAME WITH STANDARD BREAKING CAPACITY. 350A 3-POLE (65KAIC AT 240V). NON-INTERCHANGEABLE TRIP UNIT. SPECIAL FEATURES LINE AND LOAD SIDE LUGS (TA2J6500) WIRE RANGE 3/0AWG - 500KCMIL (CU) / 4/0AWG - 500KCMIL (AL). DIMENSIONS (W x H x D) IN 7.50 x 11.0 x 4.00.
MFR: Siemens
MFR #: JXD23B350L
UPC: 783643009387
Item #: 1203509
Available to Order
$10310.65 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE SENTRON MOLDED CASE CIRCUIT BREAKER WITH THERMAL - MAGNETICTRIP UNIT. ASSEMBLED STANDARD 40 DEG C BREAKER FD FRAME WITH HIGH BREAKING CAPACITY. 200A 2-POLE (25KAIC AT 600V) (65KAIC AT 480V). NON-INTERCHANGEABLE TRIP UNIT. SPECIAL FEATURES NO LUGS INSTALLED. DIMENSIONS (W x H x D) IN 4.50 x 9.5 x 4.00.
MFR: Siemens
MFR #: HFXD62B200
UPC: 783643434417
Item #: 1143046
Available to Order
$13921.92 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Main Breakers - Family G Mainsare Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type EQ Application Electrical Distribution Standard UL 489 Amperage Rating 100A Trip Range Thermal Magnetic Interrupt Rating 22 AIC
MFR: Siemens
MFR #: EQ9675
UPC: 783643255388
Item #: 32515
Available to Order
$302.71 each
Availability
Location Available Qty
Siemens
MCB UL489 1-P 1A C-TRIP SAME PHASE ONLY MINIATURE CIRCUIT-BREAKER 240 V 15 KA, 1-POLE, C, 1 A, D=70 MM TO UL 489, SAME POLARITY
MFR: Siemens
MFR #: 5SJ4101-7HG40
UPC: 754554932200
Item #: 723405
Available to Order
$99.53 each
Availability
Location Available Qty
Siemens
MCB UL489 1-P 16A B-TRIP SAME PHASE ONLY MINIATURE CIRCUIT-BREAKER 240 V 15 KA,1-POLE, B, 16 A, D=70 MM TO UL 489, SAME POLARITY
MFR: Siemens
MFR #: 5SJ4116-6HG40
UPC: 754554932583
Item #: 1087446
Available to Order
$99.53 each
Availability
Location Available Qty
Siemens
CIRCUIT BREAKER 240V 14KA, 1-POLE, C, 6A, D=70MM ACC. TO UL 489, SAME POLARITY
MFR: Siemens
MFR #: 5SJ4106-7HG40
UPC: 754554932248
Item #: 723499
Available to Order
$99.53 each
Availability
Location Available Qty
Siemens
MCB UL489 1-P 2A C-TRIP SAME PHASE ONLY MINIATURE CIRCUIT-BREAKER 240 V 15 KA, 1-POLE, C, 2 A, D=70 MM TO UL 489, SAME POLARITY
MFR: Siemens
MFR #: 5SJ4102-7HG40
UPC: 754554932217
Item #: 723406
Available to Order
$99.53 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 40A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, LOAD SIDE LUGS ONLY (TC1GG20) WIRE RANGE 8 - 1/0 AWS (CU/AL). DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B040B
UPC: 783643414303
Item #: 206915
Available to Order
$2077.97 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 125A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD,LOAD SIDE LUGS ONLY (TC1GG20) WIRE RANGE 8 - 1/0 AWS (CU/AL). DIMENSIONS (W x Hx D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B125B
UPC: 783643414396
Item #: 193391
Available to Order
$5318.63 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 125A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD,NO LUGS. DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B125
UPC: 783643553538
Item #: 175476
Available to Order
$5318.63 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 70A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, LOAD SIDE LUGS ONLY (TC1GG20) WIRE RANGE 8 - 1/0 AWS (CU/AL). DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B070B
UPC: 783643414341
Item #: 394535
Available to Order
$2438.81 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 60A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, NO LUGS. DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B060
UPC: 783643553477
Item #: 279088
Available to Order
$2077.97 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 60A 2-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, LOAD SIDE LUGS ONLY (TC1GG20) WIRE RANGE 8 - 1/0 AWS (CU/AL). DIMENSIONS (W x H x D) IN 2 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB2B060B
UPC: 783643414181
Item #: 394529
Available to Order
$1587.08 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 25A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, NO LUGS. DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B025
UPC: 783643553415
Item #: 203911
Available to Order
$2077.97 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 20A 3-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, NO LUGS. DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB3B020
UPC: 783643553408
Item #: 279047
Available to Order
$2077.97 each
Availability
Location Available Qty
Siemens
Low Voltage Molded Case Circuit Breakers Panelboard Mounting 480V Circuit Breakers - 1-pole, TM - NGB, 14KAIC, 347VAC are Circuit Protection Molded Case Circuit Breakers. BREAKER NGB 1-POLE20A 347V 14KA NO LUGS
MFR: Siemens
MFR #: NGB1B020
UPC: 783643553101
Item #: 237685
Available to Order
$520.23 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE PANELBOARD MOUNT G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGB FRAME WITH STANDARD BREAKING CAPACITY. 20A 2-POLE (14KAIC AT 600Y/347V) (25KAIC AT 480Y/277V). SPECIAL FEATURES MOUNTS ON PANELBOARD, LOAD SIDE LUGS ONLY (TC1Q1) WIRE RANGE 14 - 10 AWS (CU/AL). DIMENSIONS (W x H x D) IN 2 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGB2B020B
UPC: 783643414112
Item #: 394527
Available to Order
$1587.08 each
Availability
Location Available Qty
Siemens
LOW VOLTAGE G FRAME CIRCUIT BREAKER WITH THERMAL - MAGNETIC TRIP. UL LISTED NGG FRAME WITH STANDARD BREAKING CAPACITY. 40A 3-POLE (14KAIC AT 600Y/347V)(25KAIC AT 480V). SPECIAL FEATURES MOUNTS ON DIN RAIL / SCREW, LINE AND LOAD SIDE LUGS (TC1GG20) WIRE RANGE 8 - 1/0 AWS (CU/AL). DIMENSIONS (W x H x D) IN 3 x 5.4 x 2.8.
MFR: Siemens
MFR #: NGG3B040L
UPC: 783643413832
Item #: 1273493
Available to Order
$2639.27 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Miniature Thermal Mag Circuit Breakers - Type QP/MP, 2-Pole, 120/240VAC are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type QP/MP Application Electrical Distribution Standard UL 489 Voltage Rating 120/240V Amperage Rating 80A Trip Range Thermal Magnetic Interrupt Rating 22 AIC Number Of Poles 2P
MFR: Siemens
MFR #: Q280H
UPC: 783643226142
Item #: 824829
Available to Order
$590.88 each
Availability
Location Available Qty
Siemens
BREAKER 45A 2P 120/240V 22K BLH HIGH INT.
MFR: Siemens
MFR #: B245H
UPC: 783643000926
Item #: 235326
Available to Order
$392.13 each
Availability
Location Available Qty
Siemens
Low Voltage Molded Case Circuit Breakers Panelboard Mounting 240V AFCI Circuit Breakers - 2-Pole, AFCI - BAF, 10KAIC, 120/240VAC are Circuit ProtectionMolded Case Circuit Breakers. Type BAF Special Features CAFCL Application Electrical Distribution Standard UL 489 Voltage Rating 120/240V Amperage Rating 20A Trip Range Thermal Magnetic Number Of Poles 2P Connection PLUG-IN Material COMPOSITE Length 3 Width 2 Height 3.5
MFR: Siemens
MFR #: B220AFC
UPC: 040892150698
Item #: 394894
Available to Order
$881.69 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-release 2.8...4a, n-release 52a, screw connection, standard sw. capacity
MFR: Siemens
MFR #: 3RV20111EA10
UPC: 662643923926
Item #: 725197
Available to Order
$358.88 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-release 11...16a, n-release 208a, screw connection, standard sw. capacity
MFR: Siemens
MFR #: 3RV20114AA10
UPC: 662643924220
Item #: 614968
Available to Order
$417.50 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-rel. 1.4...2a, n-release 26a, spring-l. connection standard sw. capacity
MFR: Siemens
MFR #: 3RV20111BA20
UPC: 662643921854
Item #: 1229083
Available to Order
$358.88 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Main Breakers - Type QS Breakers are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type QSH Application Electrical Distribution Standard UL 489 Voltage Rating 120/240V Amperage Rating 100A Trip Range Thermal Magnetic Interrupt Rating 22 AIC Number Of Poles 2P
MFR: Siemens
MFR #: QS2100H
UPC: 783087935280
Item #: 255194
Available to Order
$506.00 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Main Breakers - Type QS Breakers are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type QSH Application Electrical Distribution Standard UL 489 Voltage Rating 120/240V Amperage Rating 150A Trip Range Thermal Magnetic Interrupt Rating 22 AIC Number Of Poles 2P
MFR: Siemens
MFR #: QS2150H
UPC: 783087935303
Item #: 271335
Available to Order
$506.00 each
Availability
Location Available Qty
Siemens
Circuit breaker size S00 for motor protection, CLASS 10 A-release 2.2...3.2 A Nrelease 42 A screw terminal Standard switching capacityCircuit breaker size S00for motor protection, CLASS 10 A-release 2.2...3.2 A N release 42 A screw terminal Standard switching capacity
MFR: Siemens
MFR #: 3RV20111DA10
UPC: 662643921939
Item #: 614973
Available to Order
$358.88 each
Availability
Location Available Qty
Siemens
ACC_CIRCUIT_BREAKER 3RA2921-1AA00-Link Module_3RA29 21-1AA00
MFR: Siemens
MFR #: 3RA29211AA00
UPC: 662643904734
Item #: 1088947
Available to Order
$30.75 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-rel.1.1...1.6a, n-release 21a, spring-l. connection standard sw. capacity
MFR: Siemens
MFR #: 3RV20111AA20
UPC: 662643921809
Item #: 1244452
Available to Order
$344.52 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-rel. 0.55...0.8a, n-release10 a screw connection, standard sw. capacity
MFR: Siemens
MFR #: 3RV20110HA10
UPC: 662643921632
Item #: 1269471
Available to Order
$324.19 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-rel.1.8...2.5a, n-release 33a, screw connection, standard sw. capacity
MFR: Siemens
MFR #: 3RV20111CA10
UPC: 662643921885
Item #: 821359
Available to Order
$358.88 each
Availability
Location Available Qty
Siemens
Low Voltage Residential Circuit Breakers Main Breakers - Type QS Breakers are Circuit Protection Load Center Mains, Feeders, and Miniature Circuit Breakers. Type QS Application Electrical Distribution Standard UL 489 Voltage Rating120/240V Amperage Rating 125A Trip Range Thermal Magnetic Interrupt Rating 10 AIC Number Of Poles 2P
MFR: Siemens
MFR #: QS2125
UPC: 783087935235
Item #: 284906
Available to Order
$254.15 each
Availability
Location Available Qty
Siemens
Circuit-breaker sz s00, for motor protection, class 10, a-rel. 0.14...0.2a, n-release2.6a, screw connection, standard sw. capacity
MFR: Siemens
MFR #: 3RV20110BA10
UPC: 662643921335
Item #: 440634
Available to Order
$300.26 each
Availability
Location Available Qty
Siemens
Switch_MOTOR 3RV2021-4CA10-3RV2021-4CA10_17...22A_22A_460V
MFR: Siemens
MFR #: 3RV20214CA10
UPC: 662643924374
Item #: 889097
Available to Order
$461.76 each
Availability
Location Available Qty

About Circuit Breakers

Circuit breakers are a critical component of electrical systems, protecting them against overload or short-circuiting. These devices shut off power when levels exceed a safety threshold in order to prevent damage to equipment or personnel. There are a variety of types of circuit breakers to suit different applications, including miniature, molded case, low voltage, GFCI, and AFCI.