28 V Circuit Breaker 93

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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

MS3320-10

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

10 A

Screw

-55 °C (-67 °F)

2.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

2TC2-10

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

10 A

Screw

2.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

MS3320-15

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

15 A

Screw

-55 °C (-67 °F)

2.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

MS3320-3

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

3 A

Screw

-55 °C (-67 °F)

2.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

2TC2-15

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

15 A

Screw

2.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

MS3320-5

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

5 A

Screw

-55 °C (-67 °F)

2.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

2TC2-5

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

5 A

Screw

2.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

MS3320-15V

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

15 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

2TC2-21/2

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

2.5 A

Screw

2.8 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

2TC2-3

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

3 A

Screw

2.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

4411.0017

Schurter Ag

Thermal Circuit Breaker

Panel Mount

277 V

28 V

30 A

Quick Connect

-5 °C (23 °F)

1 kA

Reset Type

Bulk

1.22 in (31 mm)

0.453 in (11.5 mm)

IP40

Trip Free

1.772 in (45 mm)

CCC; CSA; GB; IEC; UL; VDE

1

60 °C (140 °F)

MS3320-1

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

1 A

Screw

-55 °C (-67 °F)

3.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

MS3320-20

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

20 A

Screw

-55 °C (-67 °F)

2 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

2TC2-20

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

20 A

Screw

2 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

MS3320-10L

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

10 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-7-1/2

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

7.5 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-2

Defense Logistics Agency

Thermal Circuit Breaker

Panel Mount

120 V

28 V

2 A

Screw

-55 °C (-67 °F)

2.8 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip Free

1.03 in (26.16 mm)

MIL-C-5809

1

121 °C (249.8 °F)

2TC2-2

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

2 A

Screw

2.8 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

MS3320-20V

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

20 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

2TC2-1

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

1 A

Screw

3.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

2TC2-25

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

25 A

Screw

1.8 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

1410-L210-L2F1-S02-5A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Through Hole Mount

240 V

28 V

5 A

Printed Circuit Board

-20 °C (-4 °F)

Silver

2 kA

Rated breaking capacity at 50 VDC: 200 A

Reset Slide

1.102 in (28 mm)

0.354 in (9 mm)

Corrosion Resistant

e4

1.102 x 0.354 x 0.425 in (28 x 9 x 10.8 mm)

0.425 in (10.8 mm)

CSA; UL; VDE

1

70 °C (158 °F)

MS3320-5L

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

5 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-5V

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

5 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-2-1/2

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

2.5 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-7-1/2V

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

7.5 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

MS3320-10V

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

10 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

413-K14-LN2-50A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

115 V

28 V

50 A

Screw

-55 °C (-67 °F)

6 kA

Push-Pull

1.26 in (32 mm)

0.748 in (19 mm)

Corrosion/Moisture Resistant; IP00; IP40

Tease-Free And Trip-Free

1.929 in (49 mm)

CSA; UL

1

75 °C (167 °F)

413-K14-N2-70A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

115 V

28 V

70 A

Screw

-55 °C (-67 °F)

6 kA

Push-Pull

1.26 in (32 mm)

0.748 in (19 mm)

Corrosion/Moisture Resistant; IP00; IP40

Tease-Free And Trip-Free

1.929 in (49 mm)

CSA; UL

1

75 °C (167 °F)

4411.0007

Schurter Ag

Thermal Circuit Breaker

Panel Mount

277 V

28 V

15 A

Quick Connect

-5 °C (23 °F)

1 kA

Reset Type

Bulk

1.22 in (31 mm)

0.453 in (11.5 mm)

IP40

Trip Free

1.772 in (45 mm)

CCC; CSA; GB; IEC; UL; VDE

1

60 °C (140 °F)

1410-L210-L2F1-S02-2A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Through Hole Mount

240 V

28 V

2 A

Printed Circuit Board

-20 °C (-4 °F)

Silver

2 kA

Rated breaking capacity at 50 VDC: 200 A

Reset Slide

1.102 in (28 mm)

0.354 in (9 mm)

Corrosion Resistant

e4

1.102 x 0.354 x 0.425 in (28 x 9 x 10.8 mm)

0.425 in (10.8 mm)

CSA; UL; VDE

1

70 °C (158 °F)

1410-L210-L2F1-S02-3.15A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Through Hole Mount

240 V

28 V

3.15 A

Printed Circuit Board

-20 °C (-4 °F)

Silver

2 kA

Rated breaking capacity at 50 VDC: 200 A

Reset Slide

1.102 in (28 mm)

0.354 in (9 mm)

Corrosion Resistant

e4

1.102 x 0.354 x 0.425 in (28 x 9 x 10.8 mm)

0.425 in (10.8 mm)

CSA; UL; VDE

1

70 °C (158 °F)

2TC2-71/2

Texas Instruments

Thermal Circuit Breaker

Panel Mount

120 V

28 V

7.5 A

Screw

2.5 kA

2TC2

Push-Pull

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

1.03 in (26.16 mm)

413-K14-N2-60A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

115 V

28 V

60 A

Screw

-55 °C (-67 °F)

6 kA

Push-Pull

1.26 in (32 mm)

0.748 in (19 mm)

Corrosion/Moisture Resistant; IP00; IP40

Tease-Free And Trip-Free

1.929 in (49 mm)

CSA; UL

1

75 °C (167 °F)

4411.0067

Schurter Ag

Thermal Circuit Breaker

Panel Mount

277 V

28 V

30 A

Screw

-5 °C (23 °F)

1 kA

Reset Type

Bulk

1.22 in (31 mm)

0.453 in (11.5 mm)

Trip

1.772 in (45 mm)

CCC; CSA; UL; VDE

1

60 °C (140 °F)

1658-G21-02-P10-10A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Inline/Holder

240 V

28 V

10 A

Tab/Blade

-20 °C (-4 °F)

200 A

Manual Reset

1.26 in (32 mm)

0.551 in (14 mm)

Trip Free

1.563 in (39.7 mm)

CSA; CUL; UL; VDE

1

60 °C (140 °F)

0916604

Phoenix Contact

Thermal Magnetic Circuit Breaker

DIN Rail Mount

240 V

28 V

1 A

Screw

-30 °C (-22 °F)

3.524 in (89.5 mm)

0.484 in (12.3 mm)

IP20; IP40

3.524 x 0.484 x 3.366 in (89.5 x 12.3 x 85.5 mm)

3.366 in (85.5 mm)

CSA; CUL; EN; UL; VDE

1

60 °C (140 °F)

MS3320-15L

Eaton Corporation

Thermal Circuit Breaker

Panel Mount

120 V

28 V

15 A

Screw

-55 °C (-67 °F)

3.5 kA

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 6000 A

Push Button

0.781 in (19.84 mm)

0.593 in (15.06 mm)

Corrosion Resistant; Moisture Resistant

0.781 x 0.593 x 1.03 in (19.84 x 15.06 x 26.16 mm)

Trip

1.03 in (26.16 mm)

1

121 °C (249.8 °F)

1410-L110-L1F1-S01-1A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Through Hole Mount

240 V

28 V

1 A

Printed Circuit Board

-20 °C (-4 °F)

Silver

2 kA

Rated breaking capacity at 50 VDC: 200 A, Environmental Characteristics: IP40; IP00

Reset Button

0.984 in (25 mm)

0.504 in (12.8 mm)

Corrosion Resistant; Moisture Resistant

e4

0.984 x 0.504 x 0.591 in (25 x 12.8 x 15 mm)

0.591 in (15 mm)

CSA; UL; VDE

1

70 °C (158 °F)

483-G411-K1M1-A1S0ZN--10A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

115 V

28 V

10 A

Screw

-55 °C (-67 °F)

2.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.768 in (19.5 mm)

0.559 in (14.2 mm)

IP40; IP00

0.768 x 0.559 x 1.22 in (19.5 x 14.2 x 31 mm)

Tease-Free And Trip-Free

1.22 in (31 mm)

1

125 °C (257 °F)

6752-100-50

Sensata Technologies

Thermal Circuit Breaker

Panel Mount

120 V

28 V

50 A

Screw

3.5 kA

1 s

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

2.189 in (55.6 mm)

0.75 in (19.05 mm)

Corrosion/Moisture Resistant

2.189 x 0.75 x 1.93 in (55.6 x 19.05 x 49.02 mm)

Trip

1.93 in (49.02 mm)

1

MS25361-50

Sensata Technologies

Thermal Circuit Breaker

Panel Mount

120 V

28 V

50 A

Screw

3.5 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

2.189 in (55.6 mm)

0.75 in (19.05 mm)

Corrosion Resistant; Moisture Resistant

2.56 in (65.02 mm)

MIL-C-5809

1

MS26574-2A

Eaton Corporation

Thermal Circuit Breaker

Panel Mount-Threaded

120 V

28 V

2 A

Screw

800 A

Standard: MIL-C-5809

0.78 in (19.81 mm)

0.593 in (15.06 mm)

0.78 x 0.593 x 1.251 in (19.81 x 15.06 x 31.78 mm)

1.251 in (31.78 mm)

MS

1

483-G411-K1M1-A1S0ZN--5A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

115 V

28 V

5 A

Screw

-55 °C (-67 °F)

2 kA

Rated breaking capacity at 28 VDC: 6000 A

Push-Pull

0.768 in (19.5 mm)

0.559 in (14.2 mm)

IP40; IP00

Tease-Free And Trip-Free

1.22 in (31 mm)

1

125 °C (257 °F)

MS26574-20L

Eaton Corporation

Thermal Circuit Breaker

Panel Mount-Threaded

120 V

28 V

20 A

Screw

500 A

Standard: MIL-C-5809, rated breaking capacity at 28 VDC: 2000 A

0.78 in (19.81 mm)

0.593 in (15.06 mm)

0.78 x 0.593 x 1.251 in (19.81 x 15.06 x 31.78 mm)

1.251 in (31.78 mm)

MS

1

1410-L210-L2F1-S02-1.5A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Through Hole Mount

240 V

28 V

1.5 A

Printed Circuit Board

-20 °C (-4 °F)

Silver

2 kA

Rated breaking capacity at 50 VDC: 200 A

Reset Slide

1.102 in (28 mm)

0.354 in (9 mm)

Corrosion Resistant

e4

1.102 x 0.354 x 0.425 in (28 x 9 x 10.8 mm)

0.425 in (10.8 mm)

CSA; UL; VDE

1

70 °C (158 °F)

1658-G21-02-P10-20A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Inline/Holder

240 V

28 V

20 A

Tab/Blade

-20 °C (-4 °F)

200 A

Manual Reset

1.26 in (32 mm)

0.551 in (14 mm)

Trip Free

1.563 in (39.7 mm)

CSA; CUL; UL; VDE

1

60 °C (140 °F)

412-K14-N2-7.5A

E-t-a Elektrotechnische Apparate

Thermal Circuit Breaker

Panel Mount

28 V

7.5 A

Screw

-55 °C (-67 °F)

6 kA

Push-Pull

1.142 in (29 mm)

0.571 in (14.5 mm)

Corrosion/Moisture Resistant; IP00; IP40

Trip Free

1.811 in (46 mm)

CSA; UL

1

75 °C (167 °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.