240 V Circuit Breaker 57

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Part	Manufacturer	Circuit Protection Type	Mounting Feature	Rated AC Voltage	Rated DC Voltage	Rated Current	Terminal Shape	Minimum Operating Temperature	Rated Breaking Capacity	Additional Features	Actuator Type	Packing Method	Body Length/Diameter	Body Width	Environmental Characteristics	Circuit Function	Body Height	Reference Standard	No. of Poles	Maximum Operating Temperature
3120-N321-P7T1-W19DG4-5A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	5 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-8A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	8 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-20A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	20 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-6A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	6 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-16A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	16 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
3120-N321-P7T1-W19DG4-3A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	50 V	3 A	Quick Connect	-30 °C (-22 °F)	5 kA	Rated breaking capacity at 50 VDC: 1000 A	Rocker				Corrosion/Moisture Resistant; IP00; IP40	Manual On/Off		CCC; CE; CSA; CQC; KTL; UL; VDE	2	60 °C (140 °F)
1010289	Phoenix Contact	Thermal Magnetic Circuit Breaker	DIN Rail Mount	240 V		40 A	Screw	-35 °C (-31 °F)	10 kA		Handle	Bulk	4.567 in (116 mm)	2.083 in (52.9 mm)		Trip	2.587 in (65.7 mm)	CUL; TUV; UL	3	70 °C (158 °F)
1010284	Phoenix Contact	Thermal Magnetic Circuit Breaker	DIN Rail Mount	240 V		50 A	Screw	-35 °C (-31 °F)	10 kA		Handle	Bulk	4.567 in (116 mm)	2.083 in (52.9 mm)		Trip	2.587 in (65.7 mm)	CUL; TUV; UL	3	70 °C (158 °F)
3131-AF1PT-000000-000-2A	E-t-a Elektrotechnische Apparate	Thermal Circuit Breaker	Panel Mount	240 V	28 V	2 A	Quick Connect	-20 °C (-4 °F)	20 A		Rocker		2.008 in (51 mm)	0.945 in (24 mm)	Corrosion Resistant; IP00; IP66	Manual On/Off	1.142 in (29 mm)	UL; VDE	1	60 °C (140 °F)

Circuit Breaker

A circuit breaker is an automatic electrical switch that is designed to protect an electrical circuit from damage caused by overcurrent or short circuits. Circuit breakers are commonly used in residential, commercial, and industrial electrical systems, and they are an important safety device that helps prevent electrical fires, equipment damage, and personal injury.

Circuit breakers work by monitoring the amount of current flowing through an electrical circuit. If the current exceeds a preset level, the circuit breaker will trip, or open the circuit, to prevent damage to the electrical system. When the circuit breaker trips, it interrupts the flow of current, which stops the electrical current from flowing and prevents further damage.

Circuit breakers are available in a variety of types and sizes, and they can be classified based on their voltage rating, current rating, and interrupting capacity. Some common types of circuit breakers include thermal circuit breakers, magnetic circuit breakers, and hybrid circuit breakers.

In addition to protecting electrical systems from overcurrent and short circuits, circuit breakers also help improve the reliability and efficiency of electrical systems. They can also be used to switch electrical circuits on and off, which can be helpful in certain applications.