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Circuit Breakers
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Items 1-10 of 275

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  1. SU204M-K25
    SU204M-K25
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU204M-K25
    MFG Item Number
    SU204M-K25
    Series
    SU200M
    Product Description
    UL489 MCB 4P K 25A 480/277
    Specifications
    Specifications
    Poles 4
    Current Rating 25 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  2. SU201M-K3
    SU201M-K3
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU201M-K3
    MFG Item Number
    SU201M-K3
    Series
    SU200M
    Product Description
    Circuit Breaker, 1-P, 3A/277VAC, K,
    Specifications
    Specifications
    Poles 1
    Current Rating 3 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  3. SU201M-K20
    SU201M-K20
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU201M-K20
    MFG Item Number
    SU201M-K20
    Series
    SU200M
    Product Description
    Circuit Breaker, 1-P, 20A/277VAC, K,
    Specifications
    Specifications
    Poles 1
    Current Rating 20 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  4. SU203M-K20
    SU203M-K20
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU203M-K20
    MFG Item Number
    SU203M-K20
    Series
    SU200M
    Product Description
    UL489 MCB 3P K 20A 480/277
    Specifications
    Specifications
    Poles 3
    Current Rating 20 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  5. SU203M-K30
    SU203M-K30
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU203M-K30
    MFG Item Number
    SU203M-K30
    Series
    SU200M
    Product Description
    UL489 MCB 3P K 30A 480/277
    Specifications
    Specifications
    Poles 3
    Current Rating 30 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  6. SU203M-K15
    SU203M-K15
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU203M-K15
    MFG Item Number
    SU203M-K15
    Series
    SU200M
    Product Description
    UL489 MCB 3P K 15A 480/277
    Specifications
    Specifications
    Poles 3
    Current Rating 15 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  7. SU201M-C15
    SU201M-C15
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU201M-C15
    MFG Item Number
    SU201M-C15
    Series
    SU200M
    Product Description
    Circuit Breaker, 1-P, 15A/277VAC, C,
    Specifications
    Specifications
    Poles 1
    Current Rating 15 A
    Protection Branch Circuit
    Trip Curve C
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  8. SU203M-K3
    SU203M-K3
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU203M-K3
    MFG Item Number
    SU203M-K3
    Series
    SU200M
    Product Description
    UL489 MCB 3P K 3A 480/277
    Specifications
    Specifications
    Poles 3
    Current Rating 3 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  9. SU202M-K3
    SU202M-K3
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU202M-K3
    MFG Item Number
    SU202M-K3
    Series
    SU200M
    Product Description
    Circuit Breaker, 2-P, 3A/480V, K,
    Specifications
    Specifications
    Poles 2
    Current Rating 3 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
  10. SU201M-K10
    SU201M-K10
    ABB Circuit Breakers, SU200M Series
    Item Number
    SU201M-K10
    MFG Item Number
    SU201M-K10
    Series
    SU200M
    Product Description
    Circuit Breaker, 1-P, 10A/277VAC, K,
    Specifications
    Specifications
    Poles 1
    Current Rating 10 A
    Protection Branch Circuit
    Trip Curve K
    Terminals Included Line and Load
    Trip Unit Fixed Thermal / Fixed Magnetic
    Mounting DIN Rail
    UL Standard 489
    CSA Standard 22.2
    IEC Standard 60947-2
    Neutral Pole No
    kAIC @ 240 VAC 10
    kAIC @ 277/480 VAC 10
    Terminal Type Screw
    Auxiliary Switch Optional
    Shunt Trip Optional
    Undervoltage Release No
    Alarm Switch Optional
    Busbar Optional
    Increase
    Decrease
    Compare Item
    Availability
    Order by 5:00 PM ET and your package will ship the same day.
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Circuit Protection

Circuit breakers and fuses protect against overload and short circuits for all types of applications.

A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by excess current, typically resulting from an overload or short circuit. The circuit breaker trips to interrupt the circuit, and be reset and reused.
Fuses provide the same protections. If too much current flows through the fuse, a metal link in the fuse body will melt and interrupt the circuit. A fuse can only trip and open the circuit once, so it must be replaced or repaired to complete the circuit again. Fuses are typically installed in fuse blocks, either for storage or to consolidate fuses in one, easily maintained location.

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