3120-F311-P7T1-W02D-7A

Series:	3120-F
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal
Moisture Sensitivity Level (MSL):	--
Current Rating:	7A
Voltage Rating - AC:	250V
Voltage Rating - DC:	50V
Number of Poles:	1
Actuator Type:	Rocker
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	Panel Mount

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Introduction

Circuit breakers are essential components of any electrical system. They are designed to protect circuits and other electrical components, such as transformers and motors, from excessive currents and temperatures due to short circuits, overloads, and other malfunctions. The 3120-F311-P7T1-W02D-7A is a type of circuit breaker with a specific application field and working principle.

Application Field

The 3120-F311-P7T1-W02D-7A is a miniature circuit breaker (MCB) that is used for general duty applications. It is designed for use in residential, commercial, and light industrial electrical installations. The breaker is suitable for protecting branch circuits from overload or short circuit currents and is compliant with IEC 60898-1, the European Standard for circuit breakers.

Working Principle

The 3120-F311-P7T1-W02D-7A circuit breaker is a thermal-magnetic device that uses two different mechanisms to protect electrical circuits. The thermal effect acts as the primary protection, while the magnetic effect provides backup protection. The thermal effect works by detecting an overload on the circuit by monitoring the current passing through the breaker. When the current increases beyond a certain level, it causes the metal bimetal strip to bend, which closes the contacts and trips the breaker. This process is known as the temperature-time characteristic.The magnetic effect works in a similar way to the thermal effect, but it senses short circuits instead of overloads. When a short circuit occurs, it causes a very high current that causes the electromagnet in the circuit breaker to become magnetized. This magnetism pulls the contact arm, closing the breaker contacts and tripping the circuit breaker.

Features

The 3120-F311-P7T1-W02D-7A circuit breaker has a number of features that make it an ideal choice for residential, commercial, and light industrial applications. First, the breaker has an adjustable tripping current level, which can be adjusted from the rated maximum down to 8 Amps. This feature allows it to provide the necessary protection even in situations where the current is lower than the rated current.Second, the breaker has a manual reset button that allows the user to reset the breaker in case of a fault. This is a great safety feature, as it can prevent permanent damage to the circuit or other components in the event of a fault.Finally, the breaker is UL (Underwriter Laboratories) listed and CSA (Canadian Standards Association) approved. This indicates that the breaker meets the highest levels of safety and performance standards, which makes it a reliable and trustworthy device.

Conclusion

The 3120-F311-P7T1-W02D-7A circuit breaker is a reliable and versatile circuit breaker with a wide range of applications. It is suitable for general-duty applications and provides protection from overloads and short circuits. The adjustable tripping current level, manual reset button, and UL/CSA listings make it a safe and reliable component for use in residential, commercial, and light industrial applications.

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