3 A Circuit Breaker 12

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Part RoHS Manufacturer Circuit Protection Type Mounting Feature Rated AC Voltage Rated DC Voltage Rated Current Terminal Shape Minimum Operating Temperature Terminal Finish Rated Breaking Capacity Manufacturer Series Trip Time/Delay Additional Features Actuator Type Packing Method Body Length/Diameter Body Width Environmental Characteristics JESD-609 Code Dimensions Circuit Function Body Height Reference Standard No. of Poles Maximum Operating Temperature Blow Characteristic

MS1-B-10-430-2-1CB-A-A

Carling Technologies

Magnetic Circuit Breaker

Panel Mount

50 V

3 A

Screw

-40 °C (-40 °F)

3 kA

Standards: MIL-PRF-55629, MIL-STD-202

Toggle

1.375 in (34.93 mm)

0.656 in (16.66 mm)

IP68

Series Trip

1.634 in (41.5 mm)

1

85 °C (185 °F)

W68-X2Q12-3

TE Connectivity

Magnetic Circuit Breaker

Panel Mount

277 V

3 A

Quick Connect

-40 °C (-40 °F)

5 kA

2.2 s

Toggle

2 in (50.8 mm)

1.5 in (38.1 mm)

Fungus Resistant; Moisture Resistant

2 x 1.5 x 1.64 in (50.8 x 38.1 x 41.66 mm)

Series Trip

1.64 in (41.66 mm)

CSA; UL

2

85 °C (185 °F)

Standard

W28-XT1A-3

TE Connectivity

Thermal Circuit Breaker

Panel Mount

250 V

32 V

3 A

Quick Connect

2.2 s

Push To Reset

0.76 in (19.31 mm)

0.76 in (19.31 mm)

Series Trip

1.535 in (38.99 mm)

1

CMB-033-27J6N-B-D/03

Carling Technologies

Thermal Circuit Breaker

Panel Mount

250 V

32 V

3 A

Quick Connect

-10 °C (14 °F)

1 kA

Rated breaking capacity at 32 VDC: 2500 A

Push To Reset

1.154 in (29.3 mm)

0.551 in (14 mm)

Manual On/Off

1.78 in (45.2 mm)

1

60 °C (140 °F)

AA1-B0-26-430-1B1-C

Carling Technologies

Magnetic Circuit Breaker

Panel Mount

277 V

3 A

Quick Connect

-40 °C (-40 °F)

5 kA

Standards: MIL-PRF-55629, MIL-STD-202

Handle

2 in (50.8 mm)

0.755 in (19.18 mm)

Corrosion/Moisture Resistant

Series Trip

1.64 in (41.66 mm)

CSA; UL

1

85 °C (185 °F)

3120-N321-P7T1-W01D-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

2.22 in (56.4 mm)

0.984 in (25 mm)

Corrosion Resistant; IP00; IP40

Trip Free

1.299 in (33 mm)

CCC; CSA; KC; UL; VDE

2

60 °C (140 °F)

W92-X112-3

TE Connectivity

Magnetic Circuit Breaker

Panel Mount

277 V

3 A

Stud

-40 °C (-40 °F)

5 kA

2.2 s

Toggle

2.5 in (63.5 mm)

1.5 in (38.1 mm)

Series Trip

1.845 in (46.86 mm)

2

85 °C (185 °F)

5SY4103-8

Siemens

Thermal Magnetic Circuit Breaker

DIN Rail Mount

277 V

3 A

Snap On

-25 °C (-13 °F)

5 kA

Handle

3.543 in (90 mm)

0.709 in (18 mm)

3.543 x 0.709 x 2.992 in (90 x 18 x 76 mm)

Trip

2.992 in (76 mm)

CE; CSA; EN; UL

1

45 °C (113 °F)

ESX10-103-DC24V-3A-E

E-t-a Elektrotechnische Apparate

Equipment Leakage Circuit Breaker

Panel Mount

24 V

3 A

Quick Connect

0 °C (32 °F)

Manual On/Off

2.362 in (60 mm)

0.484 in (12.3 mm)

Moisture Resistant; IP00; IP30

Trip

2.756 in (70 mm)

CSA; CUL; DNVGL; UL

1

50 °C (122 °F)

1019974

Phoenix Contact

Thermal Magnetic Circuit Breaker

DIN Rail Mount

277 V

60 V

3 A

Snap On

-35 °C (-31 °F)

5 kA

RATED BREAKING CAPACITY AT 60 VDC: 7500 A

Toggle

Bulk

3.205 in (81.4 mm)

0.693 in (17.6 mm)

IP20

Trip

2.587 in (65.7 mm)

CUL; IEC 60947-2; TUV; UL

1

70 °C (158 °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)

ESX10-TB-101-DC24V-3A-E

E-t-a Elektrotechnische Apparate

Equipment Leakage Circuit Breaker

DIN Rail Mount

24 V

3 A

Snap On

-25 °C (-13 °F)

Reset Button

3.15 in (80 mm)

0.492 in (12.5 mm)

IP20

Trip

3.268 in (83 mm)

ATEX; CSA; CUL; DNV; IEC; TUV; UKCA; UL

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.