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Miniature Circuit Breakers (MCBs)
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QOXD332
Square D by Schneider Electric QOXD332 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 32A and can operate at a rated voltage of 240V to 415V AC. It is a 3 Pole circuit breaker, suitable for three-phase applications, with a short circuit breaking rating of 3kA at 415Vac. The QOXD332 utilizes press plate terminals for secure wire connection.
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QOXD350
Square D by Schneider Electric QOXD350 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 50A and can operate at rated voltages of 240V or 415V AC. It is a 3 Pole device, ensuring it can be used in a variety of circuit configurations. The QOXD350 has a short circuit breaking rating of 3kA at 415Vac and is equipped with press plate terminals for secure wire connection.
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QOXD316
Square D by Schneider Electric QOXD316 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type for ease of installation. This MCB is rated for a current of 16A and can operate at a rated voltage of 240V to 415V AC. It is a 3 Pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD316 utilizes press plate terminals for secure wire connections.
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QOXD220
Square D by Schneider Electric QOXD220 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 20A and can operate at a rated voltage of 240V to 415V AC. It is a 2-pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD220 is equipped with press plate terminals for secure wire connection.
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QOXD232
Square D by Schneider Electric QOXD232 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 32A and can operate at a rated voltage of 240V to 415V AC. It is a 2-pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD232 utilizes press plate terminals for secure wire connection.
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QOXD263
Square D by Schneider Electric QOXD263 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 63A and can operate at rated voltages of 240V or 415V AC. It is a 2-pole device, ensuring it can interrupt both phases in a two-phase system. The QOXD263 has a short circuit breaking rating of 3kA at 415Vac and utilizes press plate terminals for secure wire connection.
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QOXD132
Square D by Schneider Electric QOXD132 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode for easy installation. This MCB has a rated current of 32A and can operate at rated voltages of 240V or 415V AC. It is a single-pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD132 is equipped with press plate terminals for secure wire connections.
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QOXD163
Square D by Schneider Electric QOXD163 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 63A and can operate at rated voltages of 240V or 415V AC. It is a single-pole device with a short circuit breaking rating of 3kA at 415Vac. The QOXD163 is equipped with press plate terminals for secure wire connection.
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QOXD216
Square D by Schneider Electric QOXD216 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 16A and can operate at a rated voltage of 240V to 415V AC. It is a 2 Pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD216 is equipped with press plate terminals for secure wire connection.
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QOXD116
Square D by Schneider Electric QOXD116 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode for easy installation. This MCB has a rated current of 16A and can operate at rated voltages of 240V or 415V AC. It is a single-pole circuit breaker with a short circuit breaking rating of 3kA at 415Vac. The QOXD116 is equipped with press plate terminals for secure wire connections.
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QOBXD116
Square D by Schneider Electric QOBXD116 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a bolt-on mounting mode and a bolt-on connection type, ensuring secure installation. This MCB is rated for a current of 16A and can operate at rated voltages of 240V or 415V AC. It is a single-pole device, equipped with press plate terminals for reliable wire connection. The QOBXD116 has a short circuit breaking rating of 3kA at 415Vac, making it suitable for various electrical protection applications.
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QOXD125
Square D by Schneider Electric QOXD125 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 25A and can operate at rated voltages of 240V or 415V AC. It is a single-pole device, ensuring it can be used in a variety of circuit configurations. The QOXD125 has a short circuit breaking rating of 3kA at 415Vac and is equipped with press plate terminals for secure wire connections.
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QOXD120
Square D by Schneider Electric QOXD120 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 20A and can operate at a rated voltage of either 240V or 415V AC. It is a single-pole device, ensuring it can be used in a variety of circuit configurations. The QOXD120 has a short circuit breaking rating of 3kA at 415Vac and is equipped with press plate terminals for secure wire connections.
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QOBXD110
Square D by Schneider Electric QOBXD110 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a bolt-on mounting mode and a bolt-on connection type, ensuring secure installation. This MCB is rated for a current of 10A and can operate at rated voltages of 240V or 415V AC. It is a single-pole device with a short circuit breaking rating of 3kA at 415Vac. The QOBXD110 is equipped with press plate terminals for reliable wire connection.
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QOBXD132
Square D by Schneider Electric QOBXD132 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a bolt-on mounting mode and a bolt-on connection type, ensuring secure installation. This MCB is rated for a current of 32A and can operate at rated voltages of 240V or 415V AC. It is a single-pole device, equipped with press plate terminals for reliable wire connection. The QOBXD132 has a short circuit breaking rating of 3kA at 415Vac, making it suitable for various electrical protection applications.
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QOBXD332
Square D by Schneider Electric QOBXD332 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a bolt-on mounting mode and a bolt-on connection type, ensuring secure installation. This MCB is rated for a current of 32A and can operate at rated voltages of 240V or 415V AC. It is a 3-pole device, providing multi-phase protection, and has a short circuit breaking rating of 3kA at 415Vac. The QOBXD332 is equipped with press plate terminals for reliable wire connection.
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QOXD110
Square D by Schneider Electric QOXD110 is a Miniature Circuit Breaker (MCB) designed for branch circuit protection. It features a plug-in mounting mode and a plug-in connection type, facilitating easy installation. This MCB is rated for a current of 10A and can operate at a rated voltage of 240V to 415V AC. It is a single-pole device, ensuring protection for one circuit per unit. The QOXD110 has a short circuit breaking rating of 3kA at 415Vac and utilizes press plate terminals for secure wire connections.
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QOBXD120
Square D by Schneider Electric QOBXD120 is a miniature circuit breaker (MCB) designed for branch circuit protection. It features a bolt-on mounting mode and a bolt-on connection type, ensuring secure installation. This MCB is rated for a current of 20A and can operate at a rated voltage of either 240V or 415V AC. It is a single-pole device, equipped with press plate terminals for reliable wire connection. The QOBXD120 has a short circuit breaking rating of 3kA at 415Vac, making it suitable for various electrical protection applications.
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QYU220SWN
Square D by Schneider Electric QYU220SWN is a Miniature Circuit Breaker (MCB) designed for unit mount installation. It functions as a switch-neutral unit-mount supplementary protector with a rated current of 20A and a rated voltage of 277V AC. This MCB accommodates a cross-section of 14-2AWG for one aluminum or copper cable and features 2 poles. It has a short circuit breaking rating of 5kA at 277Vac and is equipped with lug type terminals for secure connections.
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QYU130
Square D by Schneider Electric QYU130 is a Miniature Circuit Breaker (MCB) designed for unit mount installation. It functions as a unit-mount supplementary protector with a rated current of 30A and a rated voltage of 277V AC. This MCB accommodates a cross-section of 14-2AWG for 1 cable Al/Cu and features 1 pole. It has a short circuit breaking rating of 5kA at 277Vac and is equipped with lug type terminals.
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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.