Circuit Breakers – Mouser Singapore

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3120-N Next-Generation Circuit Breaker/Switch

E-T-A Circuit Breakers 3120-N Next-Generation Circuit Breaker/Switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. 3120-N Next-Generation Circuit Breaker/Switch, which replaces the 3120-F series, is ideally suited for overload protection of motors, pumps, transformers, and cables. After tripping, the device can reliably, easily, and quickly be reset. The positively trip-free mechanism ensures reliable circuit disconnection even with the actuator blocked.

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Part #

Circuit Breakers The 3120-N thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N is ideally suited for overload prot

3120-N523-P7T1-W19DG3-10A
E-T-A
1: $70.89
9Expected 1/4/2026

Mfr. Part No.
3120-N523-P7T1-W19DG3-10A

Mouser Part No
457-523P7T1W19DG310A

E-T-A

Datasheet

9Expected 1/4/2026

$70.89

$58.81

$48.75

$44.52

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

10 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

Circuit Breakers The 3120-N...4 IP65 rated thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N...4 is ideally sui

3120-N554-P7T1-W02D-20A
E-T-A
1: $56.04
20On Order

Mfr. Part No.
3120-N554-P7T1-W02D-20A

Mouser Part No
457-554P7T1W02D20

E-T-A

Learn More

Datasheet

20On Order

$56.04

$46.48

$39.85

$36.75

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

20 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N321-P7T1-W19DG4-10A
E-T-A
1: $64.61
40Expected 31/3/2026

Mfr. Part No.
3120-N321-P7T1-W19DG4-10A

Mouser Part No
457-N321P7T1W19DG410

E-T-A

Learn More

Datasheet

40Expected 31/3/2026

$64.61

$58.30

$50.86

$44.80

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

10 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N321-P7T1-W19DG4-15A
E-T-A
1: $54.70
10Expected 17/3/2026

Mfr. Part No.
3120-N321-P7T1-W19DG4-15A

Mouser Part No
457-N321P7T1W19DG415

E-T-A

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Datasheet

10Expected 17/3/2026

$54.70

$47.98

$39.03

$34.03

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

15 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N311-P7T1-W01D-15A
E-T-A
1: $37.47
25Expected 2/3/2026

Mfr. Part No.
3120-N311-P7T1-W01D-15A

Mouser Part No
457-N311P7T1W01D15

E-T-A

Learn More

Datasheet

25Expected 2/3/2026

$37.47

$32.41

$27.52

$23.44

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

15 A

240 VAC

50 VDC

1 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N324-P7T1-W19FG4-X3120-S01BM-2.5A
E-T-A
1: $125.21
13Expected 9/4/2026

Mfr. Part No.
3120-N324-P7T1-W19FG4-X3120-S01BM-2.5A

Mouser Part No
457-FG4X3120S01BM2.5

E-T-A

Learn More

Datasheet

13Expected 9/4/2026

$125.21

$106.81

$94.17

$81.38

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

2.5 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

Circuit Breakers Min Ord Qty 10. The 3120-N thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N is ideally suited for overload prot

3120-N303-N7Q1-W01K-16A
E-T-A
1: $45.05
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N303-N7Q1-W01K-16A

Mouser Part No
457-0N303N7Q1W01K16A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$45.05

$37.38

$30.59

$26.98

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N311-P7T1-W01H-0.5A
E-T-A
1: $52.67
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
3120-N311-P7T1-W01H-0.5A

Mouser Part No
457-0N311P7T1W01H0.5

E-T-A

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$52.67

$43.70

$36.03

$31.78

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

500 mA

240 VAC

50 VDC

1 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N311-P7T1-W01K-12A
E-T-A
1: $42.76
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N311-P7T1-W01K-12A

Mouser Part No
457-0N311P7T1W01K12A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$42.76

$35.47

$29.05

$25.62

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N311-P7T1-W02F-2.5A
E-T-A
1: $53.52
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N311-P7T1-W02F-2.5A

Mouser Part No
457-0N311P7T1W02F25A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$53.52

$49.33

$41.92

$40.57

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

2.5 A

240 VAC

50 VDC

1 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N311-P7T1-W04K-18A
E-T-A
1: $42.76
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N311-P7T1-W04K-18A

Mouser Part No
457-0N311P7T1W04K18A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$42.76

$35.47

$29.05

$25.62

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N311-P7T1-W14DR3-3A
E-T-A
1: $52.24
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
3120-N311-P7T1-W14DR3-3A

Mouser Part No
457-0N311P7T1W14DR33

E-T-A

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$52.24

$43.34

$35.72

$31.53

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

3 A

115 VAC

50 VDC

1 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N311-P7T1-W14DR3-5A
E-T-A
1: $52.24
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
3120-N311-P7T1-W14DR3-5A

Mouser Part No
457-0N311P7T1W14DR35

E-T-A

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$52.24

$43.34

$35.72

$31.53

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

5 A

115 VAC

50 VDC

1 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N31F-P7T1-SGRD-10A
E-T-A
1: $45.77
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N31F-P7T1-SGRD-10A

Mouser Part No
457-0N31FP7T1SGRD10A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$45.77

$37.97

$31.29

$27.61

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N31F-P7T1-SGRD-15A
E-T-A
1: $45.77
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N31F-P7T1-SGRD-15A

Mouser Part No
457-0N31FP7T1SGRD15A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$45.77

$37.97

$32.43

$29.89

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N31F-P7T1-SGRD-20A
E-T-A
1: $45.77
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N31F-P7T1-SGRD-20A

Mouser Part No
457-0N31FP7T1SGRD20A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$45.77

$37.97

$31.29

$27.61

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N323-P7T1-W02L-15A
E-T-A
1: $46.72
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N323-P7T1-W02L-15A

Mouser Part No
457-0N323P7T1W02L15A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$46.72

$43.06

$36.58

$35.22

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

15 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N35F-H7T1-SGRD-16A
E-T-A
1: $54.89
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
3120-N35F-H7T1-SGRD-16A

Mouser Part No
457-0N35FH7T1SGRD16A

E-T-A

Datasheet

Non-Stocked Lead-Time 10 Weeks

$54.89

$48.91

$35.99

$32.87

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

Circuit Breakers Min Ord Qty 10. The 3120-N...4 IP65 rated thermal circuit breaker/switch combination unites overcurrent protection and the function of an ON/OFF switch within a single component. The trip element is a thermal bimetal. Type 3120-N...4 is ideally suite

3120-N514-P7T1-W01D-10A
E-T-A
1: $50.12
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N514-P7T1-W01D-10A

Mouser Part No
457-0N514P7T1W01D10A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$50.12

$41.57

$34.26

$30.23

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N521-P7T1-W01L-16A
E-T-A
1: $53.45
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N521-P7T1-W01L-16A

Mouser Part No
457-0N521P7T1W01L16A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$53.45

$46.36

$43.88

$40.98

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N521-P7T1-W02D-16A
E-T-A
1: $53.45
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N521-P7T1-W02D-16A

Mouser Part No
457-0N521P7T1W02D16A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$53.45

$47.80

$40.63

$38.14

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N521-P7T1-W15DY3-2A
E-T-A
1: $100.64
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
3120-N521-P7T1-W15DY3-2A

Mouser Part No
457-0N521P7T1W15DY32

E-T-A

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$100.64

$85.82

$78.49

$69.89

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

2 A

115 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N521-P7T1-W16D-3.5A
E-T-A
1: $47.97
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N521-P7T1-W16D-3.5A

Mouser Part No
457-0N521P7T1W16D35A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$47.97

$46.69

$39.67

$38.25

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

3.5 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Illuminated

3120-N523-P7T1-W01L-15A
E-T-A
1: $53.45
Non-Stocked Lead-Time 9 Weeks
New At Mouser

Mfr. Part No.
3120-N523-P7T1-W01L-15A

Mouser Part No
457-0N523P7T1W01L15A

New At Mouser

E-T-A

Datasheet

Non-Stocked Lead-Time 9 Weeks

$53.45

$46.36

$43.88

$40.98

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

Rocker

3120-N523-P7T1-W01L-20A
E-T-A
1: $53.43
Non-Stocked Lead-Time 9 Weeks

Mfr. Part No.
3120-N523-P7T1-W01L-20A

Mouser Part No
457-0N523P7T1W01L20

E-T-A

Learn More

Datasheet

Non-Stocked Lead-Time 9 Weeks

$53.43

$46.34

$43.88

$40.98

View

Min.: 1
Mult.: 1

3120-N

Thermal Circuit Breaker

Overcurrent Protection

20 A

240 VAC

50 VDC

2 Pole

Rocker

- 30 C

+ 60 C

Non-Illuminated

3120-N Next-Generation Circuit Breaker/Switch

Customer Service Office

Company

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Support

100 mA
200 mA
300 mA
500 mA
600 mA
700 mA
800 mA
1 A
1.2 A
1.5 A
1.8 A
2 A
2.5 A
3 A
3.5 A
4 A
4.5 A
5 A
6 A
7 A