R21-1-15.0A-R121CH-V

Series:	SNAPAK®
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Magnetic (Hydraulic Delay)
Moisture Sensitivity Level (MSL):	--
Current Rating:	15A
Number of Poles:	2
Actuator Type:	Rocker
Illumination:	Red
Illumination Voltage (Nominal):	250V
Mounting Type:	Panel Mount

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Circuit breakers are a vital component of today’s electrical infrastructure. They provide protection to both people and equipment by preventing over voltage, over current, and short circuit events. The R21-1-15.0A-R121CH-V is a specific circuit breaker type featuring a bimetallic strip and thermal-magnetic technology. This article focuses on its applications and working principle. Applications The R21-1-15.0A-R121CH-V is primarily used in air conditioning, heating and ventilation systems. It is also suitable for motor starting and other general-purpose applications that require a reliable, low-voltage circuit breaker. Working Principle The R21-1-15.0A-R121CH-V operates using a bimetallic strip and thermal-magnetic technology. The bimetallic strip is sensitive to temperature changes and expands or contracts to open or close the circuit. The thermal-magnetic technology is more complex. Its operation takes into account both temperature and current. The thermal-magnetic system has two sets of contacts: the first detects current levels, while the second detects temperature levels. The switch will open when either of these two criteria is met; the current threshold is typically much lower than the temperature threshold. When an overload current is detected, the thermal-magnetic mechanism will open the circuit, effectively protecting the electrical system. The amount of time it takes to open the circuit is known as the tripping time. The tripping time of the R21-1-15.0A-R121CH-V is 10 ms, which is quick enough to prevent major damage. Once the circuit breaker has opened, it can be manually reset. When reset, the bimetallic strip and thermal-magnetic components go back to their original states, and the circuit is restored. In summary, the R21-1-15.0A-R121CH-V is a circuit breaker that is primarily used for air conditioning, heating and ventilation systems. It is equipped with a bimetallic strip and thermal-magnetic technology, which allows it to quickly detect and trip during over voltage or over current events. The tripping time of the R21-1-15.0A-R121CH-V is 10 ms, making it a reliable and effective circuit breaker.

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