Series:	SNAPAK®
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Magnetic (Hydraulic Delay)
Moisture Sensitivity Level (MSL):	--
Current Rating:	--
Number of Poles:	2
Actuator Type:	Push to Reset
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	Panel Mount

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Circuit Breakers

PR21-4-10.0A-20393-1-V application field and working principle

Circuit breaker is a vital device in electrical engineering circuits, which can automatically disconnect circuits in case of overload, short circuit, insulation fault and other abnormal conditions. It protects people’s safety and the safety of electrical equipment from possible damage. Therefore, it is widely used in power distribution systems, machine control systems, electric vehicles and other places as an effective protection device. Nowadays, circuit breakers with modern design are widely applied in many countries. Among them, the PR21-4-10.0A-20393-1-V circuit breaker is an important type of three pole industrial circuit breaker.PR21-4-10.0A-20393-1-V circuit breaker is an industrial three-pole circuit breaker with rated current from 10A to 100A, rated voltage up to 400VAC, and a breaking capacity of 3000A. It is suitable for use in TN-C-S, TT and IT power distribution systems, especially in the AC 50~60 Hz power system with rated voltage up to 400V. The application fields of PR21-4-10.0A-20393-1-V include residential, public engineering, and industrial electrical systems, such as hotels, laboratories, restaurants and workshops, etc. The working principle of a three-pole PR21-4-10.0A-20393-1-V circuit breaker is based on electromagnetic action. Electromagnetic circut breakers use two magnets for the opening and closing of the contacts. One magnet is fixed and the other is movable, connected to the tripping device. When the current in the circuit exceeds the rated current of the breaker, it will cause the movable magnet to move and separate the contacts, thus stopping the circuit. In order to ensure the safety of the three-pole PR21-4-10.0A-20393-1-V circuit breaker, some protection functions are designed for it. The overload protection function is designed to prevent the circuit from heating up due to the intermittent overload caused by high current. The short circuit protection function is designed to prevent the circuit from being damaged by high current. The insulation protection function is designed to protect the circuit when the insulation resistance of the line is too low. There are also prevention and control against magnetic field released by the electric device, ensuring the switch to be in normal state even under certain electric pressure.In conclusion, the three-pole PR21-4-10.0A-20393-1-V circuit breaker is specialized in providing safety and reliability to family and industrial applications. The triple-pole circuit breaker can provide protection functions including overload, short circuit and insulation protection, which can keep the circuit and electric equipment safe from damages. Moreover, its electromagnetic design allows it to be powerful and reliable with a wide application. All of these features make the three-pole PR21-4-10.0A-20393-1-V an ideal circuit breaker for most electrical systems.

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Part Number	Manufacturer	Price	Quantity	Description