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Miniature Circuit Breakers (MCBs)
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QOU3601042
Square D by Schneider Electric QOU3601042 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a shunt trip coil, operates with a rated current of 60A, and offers slotted box lugs connections for both load and line sides. This MCB is compatible with a cross-section of 14-2AWG for 1 cable Al/Cu and is equipped with three poles. It supports a rated voltage of 48Vdc and 120V/240V AC, with a control voltage range of 12Vdc-24Vdc. The QOU3601042 has a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, utilizing box lugs type terminals for connections.
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QOU3601200
Square D by Schneider Electric QOU3601200 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. It features an auxiliary switch with 1a, suitable for applications requiring a 60A rated current. This MCB offers slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG for 1 cable Al/Cu. It operates on a 3 Pole system with 1 Normally Open (NO) auxiliary contact. The QOU3601200 is capable of handling rated voltages of 48Vdc and 120V/240V AC, with a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. Its terminals are designed as box lugs.
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QOU360
Square D by Schneider Electric QOU360 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 3-pole configuration and is capable of handling a rated current of 60A. This MCB is equipped with slotted box lugs connections for both load and line sides, facilitating straightforward installation. It is compatible with cables ranging from 14-2AWG (1 cable Al/Cu), ensuring versatility in connection options. The QOU360 operates effectively at a rated voltage of 120V to 240V AC and 48V DC, with a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. Its terminals are designed as box lugs, optimizing the connection integrity.
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QOU3605283
Square D by Schneider Electric QOU3605283 is a unit-mount Miniature Circuit Breaker (MCB) designed for efficient circuit protection. This MCB features a 3-pole configuration and is capable of handling a rated current of 60A. It offers versatile connection options with ring tongue connections on both the load and line sides. The QOU3605283 is engineered to operate at a rated voltage of 120V and 240V for AC circuits, and 48Vdc for DC circuits. It boasts a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, ensuring effective interruption in the event of a fault. The device utilizes ring tongue type terminals for secure and reliable connections.
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QOU3601021
Square D by Schneider Electric QOU3601021 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a shunt trip coil, facilitating remote tripping of the breaker. This MCB is rated for a current of 60A and accommodates slotted box lugs connections on both the load and line sides. It is compatible with a cross-section of 14-2AWG for one aluminum or copper cable. The QOU3601021 is a 3-pole device, supporting rated voltages of 48Vdc and 120V/240V AC, with a control voltage range of 120Vac to 208Vac. It has a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The terminals are box lugs type, designed for secure and reliable connections.
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QOU3501200
Square D by Schneider Electric QOU3501200 is a miniature circuit breaker (MCB) designed for unit mount installation. It features an auxiliary switch with 1a, suitable for applications requiring a 50A rated current. This MCB offers slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG for 1 cable Al/Cu. It operates on a 3 Pole system with 1 Normally Open (NO) auxiliary contact. The QOU3501200 is capable of handling rated voltages of 48Vdc and 120V/240V AC, with a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The terminals are designed as box lugs, facilitating secure and reliable connections.
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QOU3505283
Square D by Schneider Electric QOU3505283 is a unit-mount Miniature Circuit Breaker (MCB) designed for use in various applications requiring circuit protection. This MCB features a 3-pole configuration and is capable of handling a rated current of 50A. It offers ring tongue connections for both load and line sides, ensuring secure and reliable connections. The QOU3505283 is rated for use with 120V and 240V AC systems, as well as 48Vdc systems, providing versatility in application. It has a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, ensuring effective protection against overcurrent conditions. The terminals are designed to accommodate ring tongue connectors, facilitating easy installation and maintenance.
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QOU3501042
Square D by Schneider Electric QOU3501042 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a shunt trip coil, facilitating remote tripping of the breaker. This MCB is rated for a current of 50A and can accommodate connections via slotted box lugs on both the load and line sides. It is compatible with a wire cross-section of 14-2AWG for both aluminum and copper cables. The QOU3501042 supports a 3-pole configuration and operates at a control voltage range of 12Vdc to 24Vdc. It is designed to work with rated voltages of 48Vdc and 120V/240V AC, offering a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The terminals are of the box lugs type, ensuring secure and reliable connections.
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QOU3501021
Square D by Schneider Electric QOU3501021 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a shunt trip coil, making it suitable for applications requiring remote trip functionality. This MCB is rated for a current of 50A and accommodates slotted box lugs connections on both the load and line sides. It supports a cross-section of 14-2AWG for 1 cable Al/Cu. The QOU3501021 is a 3-pole device, compatible with rated voltages of 48Vdc and 120V/240V AC. Its control voltage ranges from 120Vac to 208Vac. The short circuit breaking rating stands at 10kA for 240Vac and 5kA for 48Vdc, with box lugs as the type of terminals.
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QOU350
Square D by Schneider Electric QOU350
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QOU3455283
Square D by Schneider Electric QOU3455283 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 3-pole configuration and supports a rated current of 45A. This MCB is equipped with ring tongue connections on both the load and line sides, facilitating secure and straightforward installation. It operates effectively at a rated voltage of 120V to 240V AC and 48V DC. The QOU3455283 offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, ensuring protection against overcurrents. The terminals are designed to accommodate ring tongue type connectors.
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QOU345
Square D by Schneider Electric QOU345 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 3-pole configuration and accommodates a rated current of 45A. This MCB is compatible with slotted box lugs connections for both load and line sides, ensuring a secure and stable connection. It is designed to work with a cross-section of 14-2AWG (1 cable Al/Cu), making it versatile for various wiring needs. The QOU345 offers a rated voltage of 120V and 240V for AC circuits and 48Vdc for DC circuits, with a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. Its terminals are of the box lugs type, facilitating straightforward installation and maintenance.
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QOU3401200
Square D by Schneider Electric QOU3401200 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. It features an auxiliary switch with 1a, suitable for applications requiring a 40A rated current. This MCB is equipped with slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG (1 cable Al/Cu). It operates on a 3 Pole system and includes 1 Normally Open (NO) auxiliary contact. The QOU3401200 is rated for 48Vdc and 120/240Vac, with a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The terminals are of the box lugs type.
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QOU3405283
Square D by Schneider Electric QOU3405283 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 3-pole configuration and supports a rated current of 40A. This MCB is compatible with ring tongue connections on both the load and line sides, facilitating straightforward installation. It operates effectively at a rated voltage of 120V or 240V AC and 48V DC. The QOU3405283 offers a short circuit breaking rating of 10kA at 240V AC and 5kA at 48V DC, ensuring protection against overcurrents. The terminals are designed to accommodate ring tongue connectors, enhancing the ease of wiring and connection.
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QOU3401042
Square D by Schneider Electric QOU3401042 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. It features a shunt trip coil, facilitating remote tripping. This MCB is equipped with slotted box lugs connections for both load and line sides, accommodating a wire cross-section of 14-2AWG for aluminum or copper cables. It is a 3-pole device, rated for a current of 40A. The QOU3401042 supports a rated voltage of 120V and 240V for AC circuits, and 48Vdc for DC circuits, with a control voltage range of 12Vdc to 24Vdc. It has a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The terminals are box lugs type, designed for secure and reliable connections.
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QOU3401021
Square D by Schneider Electric QOU3401021 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a shunt trip coil, facilitating remote tripping of the breaker. This MCB is rated for a current of 40A and accommodates slotted box lugs connections on both the load and line sides. It is compatible with a cross-section of 14-2AWG for one aluminum or copper cable. The QOU3401021 is a 3-pole breaker, suitable for systems with rated voltages of 48Vdc and 120V/240V AC. It operates within a control voltage range of 120Vac to 208Vac. The short circuit breaking rating stands at 10kA for 240Vac and 5kA for 48Vdc, with box lugs as the type of terminals.
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QOU340
Square D by Schneider Electric QOU340 is a unit-mount Miniature Circuit Breaker (MCB) designed for efficient circuit protection. This 3-pole MCB operates with a rated current of 40A and accommodates connections through slotted box lugs on both the load and line sides. It is compatible with a wire cross-section of 14-2AWG for both aluminum and copper cables. The QOU340 is versatile in its application, supporting a rated voltage of 120V and 240V for AC circuits, and 48Vdc for DC circuits. Its short circuit breaking rating stands at 10kA for 240Vac and 5kA for 48Vdc, ensuring effective interruption capacity within its specified ratings. The device utilizes box lugs as its type of terminals for secure wire connections.
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QOU3355283
Square D by Schneider Electric QOU3355283 is a unit-mount Miniature Circuit Breaker (MCB) designed for efficient circuit protection. This MCB features a 3-pole configuration and is capable of handling a rated current of 35A. It offers versatile connection options with ring tongue connections on both the load and line sides. The QOU3355283 is engineered to operate at a rated voltage of 120V and 240V for AC circuits, and 48Vdc for DC circuits. It boasts a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, ensuring effective interruption in the event of a fault. The device utilizes ring tongue type terminals for secure and reliable connections.
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QOU335
Square D by Schneider Electric QOU335 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 3-pole configuration and accommodates a rated current of 35A. This MCB is compatible with both AC and DC applications, supporting rated voltages of 120V and 240V for AC, and 48Vdc for DC. It is equipped with slotted box lugs connections on both the load and line sides, facilitating connections with a cross-section range of 14-2AWG for aluminum or copper cables. The QOU335 offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, utilizing box lugs as its terminal type.
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QOU3301201
Square D by Schneider Electric QOU3301201 is a miniature circuit breaker (MCB) designed for unit mount installation. It features an auxiliary switch with 1b function, suitable for applications requiring a 30A rated current. This MCB offers versatile connection options with slotted box lugs connections for both load and line sides. It is compatible with a cross-section of 14-2AWG for 1 cable Al/Cu and supports a 3 Pole configuration. The QOU3301201 is equipped with 1 NC (Normally Closed) auxiliary contact and has a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. It operates effectively at a rated voltage of 120V to 240V AC and 48Vdc, featuring box lugs type terminals for secure connections.
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Miniature Circuit Breakers (MCBs)
General Guide & Overview
Welcome to our comprehensive guide on miniature circuit breakers (MCBs). Whether you're an electrical professional or simply interested in understanding the inner workings of your home's electrical system, this article will provide you with all the information you need about MCBs.
MCBs are vital components of electrical systems, offering crucial protection against overloads and short circuits. Unlike traditional fuses, MCBs are automatic switches that respond to changes in current flow. This innovative technology not only enhances safety but also improves convenience for users.
In this guide, we will explore how MCBs work, the different types available, and the advantages they offer. So let's dive in and unlock the mysteries behind these essential electrical devices.
How Does a Miniature Circuit Breaker Work?
A miniature circuit breaker (MCB) is a vital component of an electrical system, designed to protect against overloads and short circuits. Understanding how an MCB works can help you ensure the safety and efficiency of your electrical installations.
MCBs operate by utilizing two types of tripping mechanisms: thermal tripping and magnetic tripping.
Thermal Tripping
Thermal tripping is the primary mechanism in MCBs. It detects and responds to excessive heat caused by an overload in the circuit. Inside the MCB, there is a bimetallic strip made of two different metals with different expansion coefficients. When the current passing through the MCB exceeds its rated capacity, the bimetallic strip heats up, causing the metals to expand at different rates. As a result, the strip bends and activates the trip mechanism, opening the contacts to interrupt the current flow.
Magnetic Tripping
Magnetic tripping is a secondary mechanism in MCBs. It provides rapid protection against short circuits by detecting strong current surges. Inside the MCB, there is an electromagnetic coil surrounding the current-carrying contacts. When a short circuit occurs, an extremely high current flows through the coil, generating a magnetic field that attracts the armature. The armature then trips the mechanism, opening the contacts and isolating the faulty circuit from the power supply.
The integration of both thermal and magnetic tripping mechanisms allows MCBs to provide reliable protection against a wide range of electrical faults. By quickly detecting and responding to abnormal current conditions, MCBs help prevent damage to electrical equipment, reduce the risk of electrical fires, and ensure the uninterrupted supply of electricity.
Advantages and Application of Miniature Circuit Breakers (MCBs)
Miniature circuit breakers (MCBs) provide a host of advantages compared to traditional fuses. One key advantage is their high responsiveness to changes in current flow, enabling swift and effective protection against overloads and short circuits. With MCBs, you can ensure that your electrical system remains safe and reliable.
MCBs are designed with a trip-free switching mechanism that instantly cuts off power in the event of an overload. This feature enhances the safety of your electrical circuits, preventing any potential damage or hazards. Additionally, MCBs are incredibly user-friendly, offering ease of installation and operation.
Another advantage of MCBs is the wide variety of models available, catering to different application requirements. Whether you need a specific current rating, breaking capacity, or fault protection characteristics, there is an MCB type that suits your needs. This flexibility allows for customization and ensures optimal performance, making MCBs a versatile choice for various electrical systems and applications.
FAQ
A miniature circuit breaker (MCB) is an important component of an electrical system that provides protection against overloads and short circuits. Unlike traditional fuses, MCBs are automatic switches that open and close in response to changes in current flow, offering improved safety and convenience.
A miniature circuit breaker (MCB) works by using two types of tripping mechanisms: thermal tripping and magnetic tripping. Thermal tripping responds to excessive heat caused by an overload, while magnetic tripping responds to sudden increases in current flow caused by a short circuit.
Miniature circuit breakers (MCBs) offer several advantages over traditional fuses. They are highly responsive to changes in current flow and provide reliable protection against overloads and short circuits. MCBs are easy to use, with a trip-free switching mechanism that instantly shuts off power in the event of an overload. They also have a wide range of models available, allowing for customization based on specific application requirements.