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QOU110Square D Circuit Breakers, QO SeriesItem NumberQOU110MFG Item Number340371SeriesQOProduct DescriptionThermal Magnetic Circuit Breaker,SpecificationsSpecifications Poles 1 Current Rating 10 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Box Terminal Auxiliary Switch No Shunt Trip No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QOB320Square D Circuit Breakers, QO SeriesItem NumberQOB320MFG Item Number428399SeriesQOProduct DescriptionMiniature Circuit Breaker 240V 20ASpecificationsSpecifications Poles 3 Current Rating 20 A Max Voltage 240 VAC Neutral Protection No 100% Rated No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Bolt-On Auxiliary Switch No Shunt Trip No Undervoltage Release No Alarm Switch No Busbar No Availability -
QO220Square D Circuit Breakers, QO SeriesItem NumberQO220MFG Item Number541142SeriesQOProduct DescriptionQO Miniature Circuit Breaker, 20A,SpecificationsSpecifications Poles 2 Current Rating 20 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Ring Tongue Auxiliary Switch No Shunt Trip No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QO215Square D Circuit Breakers, QO SeriesItem NumberQO215MFG Item Number582889SeriesQOProduct DescriptionQO Miniature Circuit Breaker, 15A,SpecificationsSpecifications Poles 2 Current Rating 15 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Ring Tongue Auxiliary Switch No Shunt Trip No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QO250Square D Circuit Breakers, QO SeriesItem NumberQO250MFG Item Number541145SeriesQOProduct DescriptionQO Miniature Circuit Breaker, 50A,SpecificationsSpecifications Poles 2 Current Rating 50 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Box Terminal Auxiliary Switch No Shunt Trip No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QOU130Square D Circuit Breakers, QO SeriesItem NumberQOU130MFG Item Number485578SeriesQOProduct DescriptionMiniature Circuit Breaker 120/240VSpecificationsSpecifications Poles 1 Current Rating 30 A Max Voltage 240 VAC Terminals Included Line and Load 100% Rated No kAIC @ 120 VAC 10 Auxiliary Switch No Shunt Trip No Undervoltage Release No Alarm Switch No Busbar No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QOU220Square D Circuit Breakers, QO SeriesItem NumberQOU220MFG Item Number261607SeriesQOProduct DescriptionMiniature Circuit Breaker120/240VSpecificationsSpecifications Poles 2 Current Rating 20 A Max Voltage 240 VAC Terminals Included Line and Load 100% Rated No kAIC @ 120 VAC 10 Auxiliary Switch No Shunt Trip No Undervoltage Release No Alarm Switch No Busbar No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QO240Square D Circuit Breakers, QO SeriesItem NumberQO240MFG Item Number583500SeriesQOProduct DescriptionQO Miniature Circuit Breaker, 40A,SpecificationsSpecifications Poles 2 Current Rating 40 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Box Terminal Auxiliary Switch No Shunt Trip No Availability -
QO115Square D Circuit Breakers, QO SeriesItem NumberQO115MFG Item Number540175SeriesQOProduct DescriptionQO Miniature Circuit Breaker, 15A,SpecificationsSpecifications Poles 1 Current Rating 15 A Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 kAIC @ 240 VAC 10 Terminal Type Ring Tongue Auxiliary Switch No Shunt Trip No AvailabilityOrder by 5:00 PM ET and your package will ship the same day. -
QO120GFISquare D Circuit Breakers, QO SeriesItem NumberQO120GFIMFG Item Number607621SeriesQOProduct DescriptionSquare D QO Mini CB, QO, 20 A, 1P,SpecificationsSpecifications Poles 1 Current Rating 20 A Max Voltage 120 VAC Protection Branch Circuit Terminals Included Line and Load Trip Unit Fixed Thermal / Fixed Magnetic Mounting Panel Neutral Pole No kAIC @ 120 VAC 10 Terminal Type Ring Tongue Auxiliary Switch No Shunt Trip No AvailabilityOrder 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.
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.