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    Industrial Circuit Breakers & Protection Devices

    Ensure electrical safety and operational continuity with our robust selection of air breakers, vacuum circuit breakers, and DIN rail-mounted solutions. Designed to provide dependable circuit protection across industrial power systems and critical infrastructure.

    Safeguard your electrical systems with our comprehensive range of circuit breakers. Our comprehensive range features air breakers, ground & test devices, DIN rail mount circuit breakers, vacuum circuit breakers, and panel mount circuit breakers to meet your circuit protection needs. Whether you're safeguarding critical electrical systems, upgrading industrial equipment, or maintaining power distribution networks, our circuit breakers provide the reliable protection and control you need for optimal performance and safety. Shop now for reliable circuit breakers to protect your electrical systems.

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    Results 51-100 of 732.
    SIEMENS HB1B020

    SIEMENS

    HB1B020

    CIRCUIT BREAKER, BQ SERIES, TYPE HBQ, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 1 POLE, 1 PHASE, 20 AMP, 120 VAC
    ✓ IN STOCK!
    $352.00 Buy Surplus As Low As $118.00
    $118.00
    SIEMENS HB3B020

    SIEMENS

    HB3B020

    CIRCUIT BREAKER, BQ SERIES, TYPE HBQ, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 3 POLE, 3 PHASE, 20 AMP, 240 VAC
    ✓ IN STOCK!
    $1,453.00 Buy Surplus As Low As $677.60
    $677.60
    SIEMENS HHED63B040L

    SIEMENS

    HHED63B040L

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, EXTRA HIGH IC RATING, TYPE ED, 600 VAC, 3 POLE, STANDARD 40 DEGREES C BREAKER, 40 AMP
    ✓ IN STOCK!
    $3,905.21 Buy Surplus As Low As $2,577.44
    $2,577.44
    Repair Yours $455.00
    SIEMENS HHJD63F400

    SIEMENS

    ITE SIEMENS

    HHJD63F400

    CIRCUIT BREAKER, 400 AMP, 3 POLE, 600 VAC, 50 KA, FRAME ONLY
    ✓ IN STOCK!
    $2,429.58 Buy Surplus As Low As $1,880.46
    $1,880.46
    Repair Yours $1,560.78
    SIEMENS FXD62B175

    SIEMENS

    FXD62B175

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, STANDARD RATING, TYPE FD, 600 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 175 AMP
    ✓ IN STOCK!
    $3,453.02 Buy Surplus As Low As $585.22
    $585.22
    Repair Yours $485.73
    SIEMENS HFD63B150

    SIEMENS

    HFD63B150

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE FD, 600 VAC, 3 POLE, STANDARD 40 DEGREES C BREAKER, 150 AMP
    ✓ IN STOCK!
    $21,230.00 Buy Surplus As Low As $6,825.60
    $6,825.60
    SIEMENS HFXD63B125

    SIEMENS

    HFXD63B125

    CIRCUIT BREAKER, SENTRON SERIES, TYPE HFXD, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 3 POLE, 3 PHASE, 125 AMP, 600 VAC
    ✓ IN STOCK!
    $19,908.87 Buy Surplus As Low As $12,758.00
    $12,758.00
    Repair Yours $6,097.60
    SIEMENS HHED62B060

    SIEMENS

    ITE SIEMENS

    HHED62B060

    CIRCUIT BREAKER, TYPE HHED, SENTRON SERIES, EXTRA HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 60 AMP, 600 VAC
    ✓ IN STOCK!
    $495.00 Buy Surplus As Low As $378.68
    $378.68
    Repair Yours $247.00
    SIEMENS HHED62B060L

    SIEMENS

    HHED62B060L

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, EXTRA HIGH IC RATING, TYPE ED, 600 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 60 AMP
    ✓ IN STOCK!
    $511.74 Buy Surplus As Low As $307.04
    $307.04
    Repair Yours $292.82
    SIEMENS HHED62B090L

    SIEMENS

    HHED62B090L

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, EXTRA HIGH IC RATING, TYPE ED, 600 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 90 AMP
    ✓ IN STOCK!
    $561.65 Buy Surplus As Low As $362.00
    $362.00
    Repair Yours $301.00
    SIEMENS HHED62B100

    SIEMENS

    ITE SIEMENS

    HHED62B100

    BREAKER, ED 2P 100A 600V 18KA LD LUG
    ✓ IN STOCK!
    $601.92 Buy Surplus As Low As $492.48
    $492.48
    Repair Yours $412.89
    SIEMENS HNXD63B100

    SIEMENS

    HNXD63B100

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE ND, 600 VAC, 3 POLE, STANDARD 40 DEGREES C BREAKER, 100 AMP
    ✓ IN STOCK!
    $33,412.48 Buy Surplus As Low As $3,053.54
    $3,053.54
    Repair Yours $2,534.44
    SIEMENS HED42B045

    SIEMENS

    HED42B045

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE ED, 480 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 45 AMP
    ✓ IN STOCK!
    $4,132.00 Buy Surplus As Low As $2,628.93
    $2,628.93
    SIEMENS HED42B050L

    SIEMENS

    HED42B050L

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE ED, 480 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 50 AMP
    ✓ IN STOCK!
    $2,230.14 Buy Surplus As Low As $2,027.40
    $2,027.40
    Repair Yours $200.00
    SIEMENS HED42B080

    SIEMENS

    HED42B080

    CIRCUIT BREAKER, SENTRON SERIES, TYPE HED, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 80 AMP, 480 VAC
    ✓ IN STOCK!
    $4,750.00 Buy Surplus As Low As $3,135.00
    $3,135.00
    Repair Yours $317.89
    SIEMENS HED42B110

    SIEMENS

    HED42B110

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE ED, 480 VAC, 2 POLE, STANDARD 40 DEGREES C BREAKER, 110 AMP
    ✓ IN STOCK!
    $9,635.00 Buy Surplus As Low As $6,133.29
    $6,133.29
    Repair Yours $3,571.00
    SIEMENS HED43B090L

    SIEMENS

    HED43B090L

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, HIGH IC RATING, TYPE ED, 480 VAC, 3 POLE, STANDARD 40 DEGREES C BREAKER, 90 AMP
    ✓ IN STOCK!
    $693.85 Buy Surplus As Low As $412.29
    $412.29
    Repair Yours $316.34
    SIEMENS LMD63T500

    SIEMENS

    LMD63T500

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, STANDARD RATING, TYPE LMD, 600 VAC, 3 POLE, 40 DEGREES C TRIP UNIT, 500 AMP
    ✓ IN STOCK!
    $7,932.87 Buy Surplus As Low As $4,621.09
    $4,621.09
    Repair Yours $3,835.50
    SIEMENS LMD63T600

    SIEMENS

    LMD63T600

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, STANDARD RATING, TYPE LMD, 600 VAC, 3 POLE, 40 DEGREES C TRIP UNIT, 600 AMP
    ✓ IN STOCK!
    $824.62 Buy Surplus As Low As $533.74
    $533.74
    Repair Yours $443.00
    SIEMENS LMD63T700

    SIEMENS

    LMD63T700

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, STANDARD RATING, TYPE LMD, 600 VAC, 3 POLE, 40 DEGREES C TRIP UNIT, 700 AMP
    ✓ IN STOCK!
    $1,308.70 Buy Surplus As Low As $847.06
    $847.06
    Repair Yours $703.06
    SIEMENS LMXD63B500

    SIEMENS

    LMXD63B500

    MOLDED CASE CIRCUIT BREAKER, SENTRON SERIES, THERMAL MAHNETIC, STANDARD RATING, TYPE LMD, 600 VAC, 3 POLE, STANDARD 40 DEGREES C BREAKER, 500 AMP
    ✓ IN STOCK!
    $26,741.00 Buy Surplus As Low As $12,177.00
    $12,177.00
    SIEMENS MSF6

    SIEMENS

    MSF6

    SCREW KIT, SENTRON SERIES, SUITABLE FOR FD FRAME CIRCUIT BREAKERS, 4 PIECES
    ✓ IN STOCK!
    $20.00 Buy Surplus As Low As $14.00
    $14.00
    SIEMENS NEG3B100L

    SIEMENS

    ITE SIEMENS

    NEG3B100L

    BREAKER, 3P, 100A, 240V, 85KA, LUGS, MAGNETIC TRIP UNIT., UL LISTED, NEG FRAME WITH STANDARD BREAKING CAPACITY
    ✓ IN STOCK!
    $5,054.67 Buy Surplus As Low As $1,386.91
    $1,386.91
    Repair Yours $1,187.00
    SIEMENS PC4754

    SIEMENS

    PC4754

    CIRCUIT BREAKER ADAPTER, 3-POLE, 600 VAC MAX, 250 AMP MAX, PLUG-IN MOUNTING ASSEMBLY, TYPE F / FD FRAME
    ✓ IN STOCK!
    $811.00 Buy Surplus As Low As $487.00
    $487.00
    SIEMENS QJH22B060

    SIEMENS

    ITE SIEMENS

    QJH22B060

    CIRCUIT BREAKER, QJ SERIES, TYPE QJH2, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 60 AMP, 240 VAC
    ✓ IN STOCK!
    $788.81 Buy Surplus As Low As $428.57
    $428.57
    Repair Yours $371.26
    SIEMENS QJH22B070

    SIEMENS

    ITE SIEMENS

    QJH22B070

    CIRCUIT BREAKER, QJ SERIES, TYPE QJH2, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 70 AMP, 240 VAC
    ✓ IN STOCK!
    $698.23 Buy Surplus As Low As $420.26
    $420.26
    Repair Yours $277.47
    SIEMENS QJH22B150

    SIEMENS

    ITE SIEMENS

    QJH22B150

    QJH22B150 CIRCUIT BREAKER, 150A, QJH, CIRCUIT BREAKER, 240V, 150 AMP
    ✓ IN STOCK!
    $671.32 Buy Surplus As Low As $266.70
    $266.70
    Repair Yours $245.95
    SIEMENS QJH22B175

    SIEMENS

    ITE SIEMENS

    QJH22B175

    QJH22B175 CIRCUIT BREAKER, 175A, QJH, CIRCUIT BREAKER, 240V, 175 AMP
    ✓ IN STOCK!
    $784.86 Buy Surplus As Low As $476.68
    $476.68
    Repair Yours $371.26
    SIEMENS QJH23B060

    SIEMENS

    ITE SIEMENS

    QJH23B060

    CIRCUIT BREAKER, QJ SERIES, TYPE QJH2, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 3 POLE, 3 PHASE, 60 AMP, 240 VAC
    ✓ IN STOCK!
    $877.58 Buy Surplus As Low As $612.31
    $612.31
    Repair Yours $437.03
    SIEMENS QJH23B080

    SIEMENS

    ITE SIEMENS

    QJH23B080

    QJH23B080 CIRCUIT BREAKER, 80A, QJH, CIRCUIT BREAKER, 240V, 80 AMP
    ✓ IN STOCK!
    $772.20 Buy Surplus As Low As $551.63
    $551.63
    Repair Yours $384.56
    SIEMENS QJH23B090

    SIEMENS

    ITE SIEMENS

    QJH23B090

    QJH23B090 CIRCUIT BREAKER, 90A, QJH, CIRCUIT BREAKER, 240V, 90 AMP
    ✓ IN STOCK!
    $856.36 Buy Surplus As Low As $638.80
    $638.80
    Repair Yours $426.47
    SIEMENS QJH23B110

    SIEMENS

    ITE SIEMENS

    QJH23B110

    QJH23B110 CIRCUIT BREAKER, 110A, QJH, CIRCUIT BREAKER, 240V, 110 AMP
    ✓ IN STOCK!
    $1,121.00 Buy Surplus As Low As $673.00
    $673.00
    Repair Yours $559.00
    SIEMENS QJH23B175

    SIEMENS

    ITE SIEMENS

    QJH23B175

    CIRCUIT BREAKER, QJ SERIES, TYPE QJH2, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 3 POLE, 3 PHASE, 175 AMP, 240 VAC
    ✓ IN STOCK!
    $973.35 Buy Surplus As Low As $567.00
    $567.00
    Repair Yours $470.61
    SIEMENS QN2200H

    SIEMENS

    QN2200H

    CIRCUIT BREAKER, Q SERIES, TYPE QN, THERMAL MAGNETIC, HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 200 AMP, 240 VAC
    ✓ IN STOCK!
    $342.99 Buy Surplus As Low As $200.00
    $200.00
    Repair Yours $200.00
    SIEMENS SLD69500NGT

    SIEMENS

    ITE SIEMENS

    SLD69500NGT

    CIRCUIT BREAKER, LD6 3P 600V 500A LSIG
    $29,001.00 Buy Surplus As Low As $17,401.00
    $17,401.00
    Repair Yours $14,443.00
    SIEMENS MBK125

    SIEMENS

    MBK125

    LC REPLACEMENT MAINS, BREAKER 125A 2P 120/240V 22K EQ9677 MAIN
    ✓ IN STOCK!
    $490.00 Buy Surplus As Low As $88.63
    $88.63
    SIEMENS MBKQJ1150

    SIEMENS

    MBKQJ1150

    BREAKER MOUNTING KIT W/ QJ22B150
    ✓ IN STOCK!
    $598.33 Buy Surplus As Low As $359.00
    $359.00
    Repair Yours $297.97
    SIEMENS NMX3B800

    SIEMENS

    ITE SIEMENS

    NMX3B800

    NON-INTERCHANGEABLE FRAME, 3-POLE, NEMA RATING 35KA/480V, (MOLDED CASE CIRCUIT BREAKER) TRIP UNIT TM, LI TA=40C IN=< 800A, FOR LINE PROTECTION WITHOUT CONNECTION ACCESSORIES WITHOUT AUXILIAR ...
    ✓ IN STOCK!
    $36,435.00 Buy Surplus As Low As $3,789.66
    $3,789.66
    Repair Yours $3,494.90
    SIEMENS QJ22B070H

    SIEMENS

    ITE SIEMENS

    QJ22B070H

    QJ22B070H CIRCUIT BREAKER, 70A, QJ, CIRCUIT BREAKER, 240V, 70 AMP
    ✓ IN STOCK!
    $644.41 Buy Surplus As Low As $522.89
    $522.89
    Repair Yours $339.89
    SIEMENS QJ22B080

    SIEMENS

    ITE SIEMENS

    QJ22B080

    QJ22B080 CIRCUIT BREAKER, 80A, QJ, CIRCUIT BREAKER, 240V, 80 AMP
    ✓ IN STOCK!
    $570.12 Buy Surplus As Low As $250.56
    $250.56
    Repair Yours $207.96
    SIEMENS QJ22B080H

    SIEMENS

    ITE SIEMENS

    QJ22B080H

    QJ22B080H CIRCUIT BREAKER, 80A, QJ, CIRCUIT BREAKER, 240V, 80 AMP
    ✓ IN STOCK!
    $569.44 Buy Surplus As Low As $517.86
    $517.86
    Repair Yours $434.01
    SIEMENS QJ22B090

    SIEMENS

    ITE SIEMENS

    QJ22B090

    QJ22B090 CIRCUIT BREAKER, 90A, QJ, CIRCUIT BREAKER, 240V, 90 AMP
    ✓ IN STOCK!
    $436.67 Buy Surplus As Low As $259.38
    $259.38
    Repair Yours $217.46
    SIEMENS QJ22B090H

    SIEMENS

    ITE SIEMENS

    QJ22B090H

    CIRCUIT BREAKER, QJ FRAME, 2 POLE, 90 AMP, 240 V, 42 KA
    ✓ IN STOCK!
    $689.85 Buy Surplus As Low As $517.86
    $517.86
    Repair Yours $381.72
    SIEMENS QJ22B110

    SIEMENS

    ITE SIEMENS

    QJ22B110

    QJ22B110 CIRCUIT BREAKER, 110A, QJ, CIRCUIT BREAKER, 240V, 110 AMP
    ✓ IN STOCK!
    $407.58 Buy Surplus As Low As $333.48
    $333.48
    Repair Yours $229.00
    SIEMENS QJ22B110H

    SIEMENS

    ITE SIEMENS

    QJ22B110H

    QJ22B110H CIRCUIT BREAKER, 110A, QJ, CIRCUIT BREAKER, 240V, 110 AMP
    ✓ IN STOCK!
    $623.05 Buy Surplus As Low As $517.86
    $517.86
    Repair Yours $310.28
    SIEMENS QJ22B125H

    SIEMENS

    ITE SIEMENS

    QJ22B125H

    QJ22B125H CIRCUIT BREAKER, 125A, QJ, CIRCUIT BREAKER, 240V, 125 AMP
    ✓ IN STOCK!
    $923.61 Buy Surplus As Low As $521.89
    $521.89
    Repair Yours $344.56
    SIEMENS QJ22B175

    SIEMENS

    ITE SIEMENS

    QJ22B175

    QJ22B175 CIRCUIT BREAKER, 175A, QJ, CIRCUIT BREAKER, 240V, 175 AMP
    ✓ IN STOCK!
    $675.05 Buy Surplus As Low As $297.30
    $297.30
    Repair Yours $274.17
    SIEMENS QJ22B200H

    SIEMENS

    ITE SIEMENS

    QJ22B200H

    CIRCUIT BREAKER, QJ SERIES, TYPE QJ2H, THERMAL MAGNETIC, VERY HIGH INTERRUPTING CAPACITY, 2 POLE, 1 PHASE, 200 AMP, 240 VAC
    ✓ IN STOCK!
    $1,157.72 Buy Surplus As Low As $675.00
    $675.00
    Repair Yours $554.27
    SIEMENS QJ22B225H

    SIEMENS

    ITE SIEMENS

    QJ22B225H

    QJ22B225H CIRCUIT BREAKER, 225A, QJ, CIRCUIT BREAKER, 240V, 225 AMP
    ✓ IN STOCK!
    $976.72 Buy Surplus As Low As $400.00
    $400.00
    Repair Yours $354.97
    SIEMENS QJ23B070H

    SIEMENS

    QJ23B070H

    QJ23B070H CIRCUIT BREAKER, 70A, QJ, CIRCUIT BREAKER, 240V, 70 AMP
    ✓ IN STOCK!
    $1,182.10 Buy Surplus As Low As $852.86
    $852.86
    Repair Yours $588.68
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