About Circuit Breakers

Littelfuse Circuit Breakers

A circuit breaker is a device designed to protect an electrical circuit from damage from overheating, overloading, or short circuiting. It acts like an invisible switch that automatically opens up or turns off the flow of electricity when the circuit is overloaded or the load has reached a certain level. This prevents electrical components in the circuit from being damaged or even bursting into flames. Circuit breakers are typically used in circuit protection applications and are found in most households and all businesses. Circuit breakers come in different sizes, ratings and types depending on the application. They can be manually reset or may also be self resetting, meaning that when the fault has been cleared, the circuit breaker will automatically reset itself and resume normal operation. Circuit breakers have become a standard part of electrical wiring, and are used in industrial, commercial and residential settings.

Circuit Breakers

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(Ex. GST)(▲▼)		Enter Qty SeriesProductTypeCurrent RatingVoltage Rating ACVoltage Rating DCNumber of PolesActuator TypeMinimum Operating TemperatureMaximum Operating TemperatureIlluminatedPackaging
  
                
0812020.ZXST


Circuit Breakers 20A
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 5.824
Multiples of: 1

81XxxxstAftermarket Circuit BreakersCircuit Breakers20 A 12 V1 PoleSelf - Reset  Not IlluminatedBulk
0812040.ZXST


Circuit Breakers 40A
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 5.824
Multiples of: 1

81XxxxstAftermarket Circuit BreakersCircuit Breakers40 A 12 V1 PoleSelf - Reset  Not IlluminatedBulk
30409-30


Circuit Breakers CIR BRKR 30AMP
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.142
Multiples of: 1

 Circuit BreakersAuto Reset30 A 12 VDC1 Pole   Not IlluminatedBulk
30172-30


Circuit Breakers CIRCUIT BREAKER 30A 24V
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.4734
Multiples of: 1

Box - Style Circuit Breakers          Bulk
0812030.ZXST


Circuit Breakers 30A
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.578
Multiples of: 1

81XxxxstAftermarket Circuit BreakersCircuit Breakers30 A 12 V1 PoleSelf - Reset  Not IlluminatedBulk
BUCB025.Z


Circuit Breakers 25A CBK Universal Circuit Breaker
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.715
Multiples of: 1

UCBCircuit BreakersModified Reset25 A 12 VDC1 Pole   Not IlluminatedBulk
BUCB020.Z


Circuit Breakers 20A CBK Universal Circuit Breaker
Icon ROHS
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.715
Multiples of: 1

UCBCircuit BreakersModified Reset20 A 12 VDC1 Pole   Not IlluminatedBulk
BUCB030.Z


Circuit Breakers 30A CBK Universal Circuit Breaker
Icon ROHS
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.715
Multiples of: 1

UCBCircuit BreakersModified Reset30 A 12 VDC1 Pole   Not IlluminatedBulk
0MMB015.X


Littelfuse Circuit Breakers 15A
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 6.8212
Multiples of: 1

MmbAftermarket Circuit BreakersWide Mini Footprint15 A 12 VDC1 PoleSelf - Reset  Not IlluminatedBulk
0812005.ZXST


Circuit Breakers 5A STUD TYPE CIRCUIT BREAKER
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

Littelfuse 0
6 to 16 Weeks Calender.png

USD 7.4608
Multiples of: 1

81XxxxstAftermarket Circuit BreakersCircuit Breakers5 A 12 V1 PoleSelf - Reset  Not IlluminatedBulk
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