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Miniature Circuit Breakers (MCBs)
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QOUR2155283
Square D by Schneider Electric QOUR2155283 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. This 2-pole MCB features ring tongue connections on both the load and line sides, facilitating secure and straightforward wiring. It is rated for a current of 15A and can operate at a rated voltage of 120V or 240V AC, and 48V DC. The short circuit breaking rating of this device is 10kA at 240V AC and 5kA at 48V DC, ensuring protection against significant overcurrents.
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QOUR215
Square D by Schneider Electric QOUR215 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a 2-pole configuration and accommodates a wire cross-section of 14-2AWG for both aluminum and copper cables. This MCB is equipped with slotted box lugs connections on both the load and line sides, facilitating straightforward installation. It is rated for a current of 15A and can operate at a rated voltage of 120V or 240V AC, and 48V DC. The QOUR215 offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc, ensuring protection against overcurrents. The terminals are designed as box lugs for secure and reliable connections.
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QOUR2103100
Square D by Schneider Electric QOUR2103100 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a 2-pole configuration and is capable of handling a rated current of 10A. This MCB is equipped with slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG for 1 cable Al/Cu. It operates at a rated voltage of 48Vdc and 120/240Vac, with a short circuit breaking rating of 10kA at 240Vac. The terminals are of the box lugs type, ensuring a secure connection.
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QOUR210
Square D by Schneider Electric QOUR210 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a 2-pole configuration and is capable of handling a rated current of 10A. 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 at a rated voltage of 48Vdc in DC applications and 120V to 240V in AC applications. The QOUR210 has a short circuit breaking rating of 10kA at 240Vac and utilizes box lugs as its type of terminals.
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QOUR160
Square D by Schneider Electric QOUR160 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 60A and accommodates slotted box lugs connections on both the load and line sides. This MCB is compatible with a cross-section of 14-2AWG for one aluminum or copper cable and is equipped with a single pole. It offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The QOUR160 operates with a rated voltage of 120V and 240V for AC, and 48Vdc for DC applications. Its terminals are of the box lugs type.
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QOUR150
Square D by Schneider Electric QOUR150 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 50A and accommodates slotted box lugs connections on both the load and line sides. This MCB is compatible with a cross-section of 14-2AWG for one aluminum or copper cable and is equipped with a single pole. It offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The QOUR150 operates with rated voltages of 120V and 240V AC, as well as 48V DC, and utilizes box lugs type terminals for connections.
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QOUR145
Square D by Schneider Electric QOUR145 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 45A and accommodates slotted box lugs connections on both the load and line sides. This MCB is compatible with a cross-section of 14-2AWG for a single aluminum or copper cable and is equipped with a single pole. It offers a short circuit breaking rating of 10kA at 240Vac and 5kA at 48Vdc. The QOUR145 operates with rated voltages of 48Vdc and 120V/240V AC, utilizing box lugs type terminals for connections.
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QOUR140
Square D by Schneider Electric QOUR140 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 40A and accommodates slotted box lugs connections on both the load and line sides. This MCB is compatible with a cross-section of 14-2AWG (1 cable Al/Cu) and is equipped with a single pole. It has a rated voltage of 120V to 240V AC and 48Vdc, 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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QOUR1201201
Square D by Schneider Electric QOUR1201201 is a miniature circuit breaker (MCB) designed for unit mount installation. It features an auxiliary switch with 1b function, suitable for applications requiring 1 normally closed (NC) auxiliary contact. This MCB is rated for 20A 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 QOUR1201201 supports 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, 5kA at 277Vac, and 5kA at 48Vdc. It is designed with a single pole configuration and utilizes box lug terminals for connections.
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QOUR120VH
Square D by Schneider Electric QOUR120VH is a unit-mount Miniature Circuit Breaker (MCB) designed for a single pole configuration. It features slotted box lugs connections on both the load and line sides, accommodating a cross-section of 14-2AWG for one aluminum or copper cable. This MCB is rated for a current of 20A and supports a voltage rating of 120V to 240V AC. It also has a short circuit breaking rating of 22kA at 240Vac and 5kA at 48Vdc. The terminals are of the box lugs type, ensuring a secure connection.
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QOUR115HM
Square D by Schneider Electric QOUR115HM is a Unit-mount High-Magnetic (HM) Miniature Circuit Breaker (MCB) designed for precise circuit protection. It features a single pole configuration and is rated for currents up to 15A. This MCB is compatible with a voltage range of 120V to 240V AC and has a short circuit breaking rating of 10kA at 240Vac. It accommodates wire sizes from 14 to 2 AWG for both aluminum and copper cables, ensuring versatile connection options through its slotted box lugs connections on both the load and line sides. The QOUR115HM is equipped with box lugs type terminals for secure wire attachment.
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QOUR120
Square D by Schneider Electric QOUR120 is a miniature circuit breaker (MCB) designed for unit mount installation. It features slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG for one aluminum or copper cable. This MCB is rated for a current of 20A and supports rated voltages of 48Vdc and 120V/240V AC. It is a single-pole device with a short circuit breaking rating of 10kA at 240Vac, 5kA at 277Vac, and 5kA at 48Vdc. The terminals are of the box lugs type.
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QOUR1155283
Square D by Schneider Electric QOUR1155283 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 15A and offers ring tongue connections for both load and line sides. This MCB operates with a rated voltage of 48Vdc in DC applications and 120V to 240V in AC applications. It is a single-pole device equipped with ring tongue terminals. The short circuit breaking rating is specified at 10kA for 240Vac and 5kA for both 277Vac and 48Vdc.
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QOUR125
Square D by Schneider Electric QOUR125 is a miniature circuit breaker (MCB) designed for unit mount installation. It features slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG for one aluminum or copper cable. This MCB is rated for a current of 25A and supports rated voltages of 48Vdc and 120V/240V AC. It is a single-pole unit with a short circuit breaking rating of 10kA at 240Vac, 5kA at 277Vac, and 5kA at 48Vdc. The terminals are of the box lugs type.
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QOUR1205283
Square D by Schneider Electric QOUR1205283 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a single pole configuration and is capable of handling a rated current of 20A. 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 and 240V for AC circuits, and 48Vdc for DC circuits. The QOUR1205283 offers a short circuit breaking rating of 10kA at 240Vac and 5kA at both 277Vac and 48Vdc, ensuring protection against overcurrents and short circuits in a variety of settings. Its terminals are also designed to accommodate ring tongue connectors, enhancing the reliability of connections.
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QOUR130
Square D by Schneider Electric QOUR130 is a miniature circuit breaker (MCB) designed for unit mount installation. It features a rated current of 30A and accommodates slotted box lugs connections on both the load and line sides. This MCB is compatible with a cross-section of 14-2AWG for one aluminum or copper cable and is equipped with a single pole. It has a rated voltage of 120V and 240V for AC, and 48Vdc for DC applications. The QOUR130 offers a short circuit breaking rating of 10kA at 240Vac, 5kA at 277Vac, and 5kA at 48Vdc, with box lugs as the type of terminals.
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QOUR115VH
Square D by Schneider Electric QOUR115VH is a miniature circuit breaker (MCB) designed for unit mount installation. It features slotted box lugs connections on both the load and line sides, accommodating a cross-section of 14-2AWG for one aluminum or copper cable. This MCB is rated for a current of 15A and supports a voltage rating of 120V to 240V AC. It is a single-pole device with a short circuit breaking rating of 22kA at 240Vac and 5kA at 48Vdc. The terminals are box lugs type, facilitating secure and reliable connections.
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QOUR115
Square D by Schneider Electric QOUR115 is a miniature circuit breaker (MCB) designed for unit mount installation. It features slotted box lugs connections for both load and line sides, accommodating a cross-section of 14-2AWG (1 cable Al/Cu). This MCB is rated for a current of 15A and supports rated voltages of 48Vdc in DC applications, and 120V to 240V in AC applications. It is a single-pole device with a short circuit breaking rating of 10kA at 240Vac and 5kA at both 277Vac and 48Vdc. The terminals are of the box lugs type.
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QOUR1105283
Square D by Schneider Electric QOUR1105283 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. This MCB features ring tongue connections on both the load and line sides, facilitating secure and straightforward wiring. It is rated for a current of 10A and can operate at a DC voltage of 48Vdc, as well as AC voltages of 120V and 240V. The device is equipped with a single pole and has a short circuit breaking rating of 10kA at 240Vac and 5kA at 277Vac. The terminals are designed to accommodate ring tongue connectors, ensuring a reliable connection.
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QOUR110
Square D by Schneider Electric QOUR110 is a unit-mount Miniature Circuit Breaker (MCB) designed for securing electrical circuits. It features a single pole configuration and accommodates a rated current of 10A. 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 straightforward installation. The QOUR110 is designed to handle wires ranging from 14-2AWG (1 cable Al/Cu), ensuring compatibility with a variety of wiring setups. It boasts a short circuit breaking rating of 10kA at 240Vac and 5kA at 277Vac. The terminals are of the box lugs type, enhancing the ease of connection.
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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.