219-3-40978-1 Circuit Protection

Series:	*
Part Status:	Active
Lead Free Status / RoHS Status:	--
Moisture Sensitivity Level (MSL):	--

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Circuit Breakers

Circuit breakers are devices used to protect an electrical circuit from damage caused by excess current from overload or short circuit. It works by breaking the circuit when excessive current passes through. With this protective device, the electricity supply to an appliance or circuit can be easily and quickly disconnected to prevent electrical shock or fire. The circuit breaker model number 219-3-40978-1 is a thermal-magnetic circuit breaker manufactured by Square D. This type of circuit breaker comprises both a thermal element and a magnetic element which respond to a lack of current in the circuit, as well as an excess of current.The thermal element observes the heat produced during a power overload, and when it exceeds the operating limit, it trips the breaker. The magnetic element responds to an electrical increase of current in the circuit, and triggers the release of the breaker when this current level is too high. This protection usually applies to short circuits, but it can also be used to protect from overcurrents resulting in power surges.The 219-3-40978-1 circuit breaker can be used for various applications, such as residential, commercial and industrial power distribution, in addition to mechanical applications such as motors, pumps and air blowers. Moreover, it is applicable for both single-phase and three-phase power supply. These type of circuit breakers are often used in combination with fuses as a form of double protection, which offers further safety and protection. The magnetic element reacts quicker than the thermal element, so it is able to prevent severe damage to the circuit. Additionally, the thermal element is used to secure long-term safety as it maintains a low temperature while constantly controlling the current.In summary, the 219-3-40978-1 thermal-magnetic circuit breaker responds to the absence or presence of an excessive amount of current and used for a broad range of applications. It provides adjustable and reliable trip characteristics that ensure the safety and protection of people, property and machinery by interrupting the circuit when dangerous conditions are present.

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