Circuit Breakers – Mouser Singapore

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5SY4 Miniature Circuit Breakers

Siemens 5SY4 Miniature Circuit Breakers provide safe short-circuit and overload protection for industrial applications. Siemens 5SY Miniature Circuit Breakers are available in 1-, 2-, 3-, 4-, 1+N, and 3+N-pole versions and are designed for rated currents from 0.3A to 80A at rated switching capacities of 6kA, 10kA, and 15kA. 5SY4 protects circuits of air-conditioning and ventilation systems, control cabinets, and controllers from the consequences of short-circuit and overload events.

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Part #

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K A-TRIP

5SY42105
Siemens
1: $195.35
6In Stock

Mfr. Part No.
5SY42105

Mouser Part No
982-5SY42105

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K A-TRIP

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Datasheet

6In Stock

$195.35

$152.54

$141.22

$137.43

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

10 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K B-TRIP

5SY42106
Siemens
1: $182.63
3In Stock

Mfr. Part No.
5SY42106

Mouser Part No
982-5SY42106

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K B-TRIP

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Datasheet

3In Stock

$182.63

$175.94

$171.90

$161.68

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

10 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K D-TRIP

5SY42108
Siemens
1: $189.05
6In Stock

Mfr. Part No.
5SY42108

Mouser Part No
982-5SY42108

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 10A 5K D-TRIP

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Datasheet

6In Stock

$189.05

$171.94

$146.43

$121.07

$111.44

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

10 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 5A 5K C-TRIP

5SY42117
Siemens
1: $161.36
6In Stock

Mfr. Part No.
5SY42117

Mouser Part No
982-5SY42117

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 5A 5K C-TRIP

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Datasheet

6In Stock

$161.36

$158.06

$135.21

$119.99

$111.44

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

5 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 13A 5K C-TRIP

5SY42137
Siemens
1: $164.71
5In Stock

Mfr. Part No.
5SY42137

Mouser Part No
982-5SY42137

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 13A 5K C-TRIP

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Datasheet

5In Stock

$164.71

$161.73

$153.04

$143.53

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

13 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K B-TRIP

5SY42166
Siemens
1: $182.63
5In Stock

Mfr. Part No.
5SY42166

Mouser Part No
982-5SY42166

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K B-TRIP

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Datasheet

5In Stock

$182.63

$157.30

$152.54

$141.22

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

16 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K C-TRIP

5SY42167
Siemens
1: $188.90
4In Stock

Mfr. Part No.
5SY42167

Mouser Part No
982-5SY42167

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K C-TRIP

Learn More

Datasheet

4In Stock

$188.90

$158.81

$142.62

$121.07

$111.44

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

16 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K D-TRIP

5SY42168
Siemens
1: $188.18
3In Stock

Mfr. Part No.
5SY42168

Mouser Part No
982-5SY42168

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 16A 5K D-TRIP

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Datasheet

3In Stock

$188.18

$155.96

$143.78

$118.82

$110.69

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

16 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 15A 5K C-TRIP

5SY42187
Siemens
1: $186.59
3In Stock
3Expected 18/9/2026

Mfr. Part No.
5SY42187

Mouser Part No
982-5SY42187

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 15A 5K C-TRIP

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Datasheet

3In Stock

3Expected 18/9/2026

$186.59

$149.11

$138.67

$119.80

$111.44

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

15 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 20A 5K C-TRIP

5SY42207
Siemens
1: $186.59
15In Stock

Mfr. Part No.
5SY42207

Mouser Part No
982-5SY42207

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 20A 5K C-TRIP

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Datasheet

15In Stock

$186.59

$157.30

$148.55

$119.80

$111.44

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

20 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 25A 5K C-TRIP

5SY42257
Siemens
1: $166.98
5In Stock

Mfr. Part No.
5SY42257

Mouser Part No
982-5SY42257

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 25A 5K C-TRIP

Learn More

Datasheet

5In Stock

$166.98

$158.62

$152.88

$147.68

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

25 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 2P 480V 25A 5K D-TRIP

5SY42258
Siemens
1: $182.63
1In Stock

Mfr. Part No.
5SY42258

Mouser Part No
982-5SY42258

Siemens

Circuit Breakers SUP PTOR 5SY4 2P 480V 25A 5K D-TRIP

Learn More

Datasheet

1In Stock

$182.63

$159.17

$152.54

$141.22

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

25 A

400 VAC

60 VDC

2 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 2A 5K C-TRIP

5SY43027
Siemens
1: $262.43
5In Stock

Mfr. Part No.
5SY43027

Mouser Part No
982-5SY43027

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 2A 5K C-TRIP

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Datasheet

5In Stock

$262.43

$235.18

$224.92

$208.39

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

2 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 4A 5K C-TRIP

5SY43047
Siemens
1: $271.51
3In Stock
2Expected 14/9/2026

Mfr. Part No.
5SY43047

Mouser Part No
982-5SY43047

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 4A 5K C-TRIP

Learn More

Datasheet

3In Stock

2Expected 14/9/2026

$271.51

$240.37

$227.26

$215.41

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

4 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers MINIATURE CIRCUIT BREAKER 400V

5SY43055
Siemens
1: $271.89
6In Stock

Mfr. Part No.
5SY43055

Mouser Part No
982-5SY43055

Siemens

Circuit Breakers MINIATURE CIRCUIT BREAKER 400V

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Datasheet

6In Stock

$271.89

$228.90

$205.59

$173.48

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

500 mA

400 VAC

72 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 6A C-TRIP

5SY43067
Siemens
1: $243.73
5In Stock

Mfr. Part No.
5SY43067

Mouser Part No
982-5SY43067

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 6A C-TRIP

Learn More

Datasheet

5In Stock

$243.73

$228.85

$210.98

$173.48

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

6 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 6A 5K D-TRIP

5SY43068
Siemens
1: $270.91
5In Stock

Mfr. Part No.
5SY43068

Mouser Part No
982-5SY43068

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 6A 5K D-TRIP

Learn More

Datasheet

5In Stock

$270.91

$228.90

$211.02

$174.38

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

6 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 10A 5K C-TRIP

5SY43107
Siemens
1: $235.09
4In Stock

Mfr. Part No.
5SY43107

Mouser Part No
982-5SY43107

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 10A 5K C-TRIP

Learn More

Datasheet

4In Stock

$235.09

$211.02

$174.38

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

10 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 10A 5K D-TRIP

5SY43108
Siemens
1: $268.89
1In Stock

Mfr. Part No.
5SY43108

Mouser Part No
982-5SY43108

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 10A 5K D-TRIP

Learn More

Datasheet

1In Stock

$268.89

$225.22

$207.79

$174.38

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

10 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 16A 5K C-TRIP

5SY43167
Siemens
1: $268.89
5In Stock

Mfr. Part No.
5SY43167

Mouser Part No
982-5SY43167

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 16A 5K C-TRIP

Learn More

Datasheet

5In Stock

$268.89

$235.18

$207.79

$174.38

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

16 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 16A 5K D-TRIP

5SY43168
Siemens
1: $229.50
3In Stock

Mfr. Part No.
5SY43168

Mouser Part No
982-5SY43168

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 16A 5K D-TRIP

Learn More

Datasheet

3In Stock

$229.50

$208.27

$194.37

$174.20

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

16 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 15A 5K C-TRIP

5SY43187
Siemens
1: $262.43
5In Stock

Mfr. Part No.
5SY43187

Mouser Part No
982-5SY43187

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 15A 5K C-TRIP

Learn More

Datasheet

5In Stock

$262.43

$235.18

$224.92

$208.38

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

15 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 20A 5K B-TRIP

5SY43206
Siemens
1: $262.43
5In Stock

Mfr. Part No.
5SY43206

Mouser Part No
982-5SY43206

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 20A 5K B-TRIP

Learn More

Datasheet

5In Stock

$262.43

$234.83

$224.92

$208.38

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

20 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers MINI CIRCUIT BREAKER_20A_400V

5SY43207
Siemens
1: $268.52
5In Stock

Mfr. Part No.
5SY43207

Mouser Part No
982-5SY43207

Siemens

Circuit Breakers MINI CIRCUIT BREAKER_20A_400V

Learn More

Datasheet

5In Stock

$268.52

$220.29

$204.88

$174.38

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

20 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

Circuit Breakers SUP PTOR 5SY4 3P 480V 25A 5K C-TRIP

5SY43257
Siemens
1: $262.40
4In Stock

Mfr. Part No.
5SY43257

Mouser Part No
982-5SY43257

Siemens

Circuit Breakers SUP PTOR 5SY4 3P 480V 25A 5K C-TRIP

Learn More

Datasheet

4In Stock

$262.40

$235.16

$224.35

$216.57

View

Min.: 1
Mult.: 1

Circuit Breakers

Miniature

25 A

400 VAC

60 VDC

3 Pole

Lever

- 40 C

+ 70 C

Non-Illuminated

5SY4 Miniature Circuit Breakers

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300 mA
500 mA
1 A
1.6 A
2 A
2.5 A
3 A
4 A
5 A
6 A
8 A
10 A
13 A
15 A
16 A
20 A
25 A
30 A
32 A
35 A