.hide-partial { max-height: none; } .show-more { display: none; }

18 mm Circuit Protection

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Circuit Protection

List Images

Results: 284

Applied Filters:

Width = 18 mm

Reset All

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Circuit Breakers MCB 5SJ4 1P 277V 16A 10K C-TRIP

5SJ41167HG42
Siemens
1: $114.76
2In Stock

Mfr. Part No.
5SJ41167HG42

Mouser Part No
982-5SJ41167HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 16A 10K C-TRIP

Learn More

Datasheet

2In Stock

$114.76

$97.54

$90.15

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 15A SAME PH 14K C-TRIP

5SJ41187HG40
Siemens
1: $105.93
4In Stock
2Expected 28/10/2026

Mfr. Part No.
5SJ41187HG40

Mouser Part No
982-5SJ41187HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 15A SAME PH 14K C-TRIP

Learn More

Datasheet

4In Stock

2Expected 28/10/2026

$105.93

$89.28

$82.91

$67.58

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 15A 14K C-TRIP

5SJ41187HG41
Siemens
1: $114.76
9In Stock
10Expected 17/9/2026

Mfr. Part No.
5SJ41187HG41

Mouser Part No
982-5SJ41187HG41

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 15A 14K C-TRIP

Learn More

Datasheet

9In Stock

10Expected 17/9/2026

$114.76

$97.54

$90.15

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 15A 10K C-TRIP

5SJ41187HG42
Siemens
1: $114.76
2In Stock
7Expected 8/10/2026

Mfr. Part No.
5SJ41187HG42

Mouser Part No
982-5SJ41187HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 15A 10K C-TRIP

Learn More

Datasheet

2In Stock

7Expected 8/10/2026

$114.76

$97.55

$85.53

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 15A SAME PH 14K D-TRIP

5SJ41188HG40
Siemens
1: $106.64
5In Stock

Mfr. Part No.
5SJ41188HG40

Mouser Part No
982-5SJ41188HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 15A SAME PH 14K D-TRIP

Learn More

Datasheet

5In Stock

$106.64

$81.18

$75.38

$66.08

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 20A SAME PH 14K B-TRIP

5SJ41206HG40
Siemens
1: $108.45
5In Stock

Mfr. Part No.
5SJ41206HG40

Mouser Part No
982-5SJ41206HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 20A SAME PH 14K B-TRIP

Learn More

Datasheet

5In Stock

$108.45

$91.30

$85.42

$70.88

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 20A SAME PH 14K C-TRIP

5SJ41207HG40
Siemens
1: $105.93
24In Stock

Mfr. Part No.
5SJ41207HG40

Mouser Part No
982-5SJ41207HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 20A SAME PH 14K C-TRIP

Learn More

Datasheet

24In Stock

$105.93

$89.28

$82.91

$68.60

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 20A 10K C-TRIP

5SJ41207HG42
Siemens
1: $114.76
8In Stock

Mfr. Part No.
5SJ41207HG42

Mouser Part No
982-5SJ41207HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 20A 10K C-TRIP

Learn More

Datasheet

8In Stock

$114.76

$97.54

$90.15

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 20A 10K D-TRIP

5SJ41208HG42
Siemens
1: $114.76
6In Stock

Mfr. Part No.
5SJ41208HG42

Mouser Part No
982-5SJ41208HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 20A 10K D-TRIP

Learn More

Datasheet

6In Stock

$114.76

$99.73

$85.53

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 25A 14K C-TRIP

5SJ41257HG41
Siemens
1: $116.14
4In Stock

Mfr. Part No.
5SJ41257HG41

Mouser Part No
982-5SJ41257HG41

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 25A 14K C-TRIP

Learn More

Datasheet

4In Stock

$116.14

$97.63

$90.15

$72.22

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 25A 10K C-TRIP

5SJ41257HG42
Siemens
1: $112.25
5In Stock

Mfr. Part No.
5SJ41257HG42

Mouser Part No
982-5SJ41257HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 25A 10K C-TRIP

Learn More

Datasheet

5In Stock

$112.25

$97.38

$94.06

$87.23

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 30A SAME PH 14K C-TRIP

5SJ41307HG40
Siemens
1: $108.39
7In Stock

Mfr. Part No.
5SJ41307HG40

Mouser Part No
982-5SJ41307HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 30A SAME PH 14K C-TRIP

Learn More

Datasheet

7In Stock

$108.39

$88.90

$82.91

$68.60

$63.17

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 30A 14K C-TRIP

5SJ41307HG41
Siemens
1: $114.76
3In Stock

Mfr. Part No.
5SJ41307HG41

Mouser Part No
982-5SJ41307HG41

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 30A 14K C-TRIP

Learn More

Datasheet

3In Stock

$114.76

$91.56

$85.53

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 30A 10K C-TRIP

5SJ41307HG42
Siemens
1: $114.76
4In Stock

Mfr. Part No.
5SJ41307HG42

Mouser Part No
982-5SJ41307HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 30A 10K C-TRIP

Learn More

Datasheet

4In Stock

$114.76

$97.55

$85.53

$73.92

$68.69

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 32A 10K D-TRIP

5SJ41328HG42
Siemens
1: $123.57
1In Stock

Mfr. Part No.
5SJ41328HG42

Mouser Part No
982-5SJ41328HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 32A 10K D-TRIP

Learn More

Datasheet

1In Stock

$123.57

$107.25

$102.18

$95.61

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 240V 40A SAME PH 14K C-TRIP

5SJ41407HG40
Siemens
1: $110.00
12In Stock

Mfr. Part No.
5SJ41407HG40

Mouser Part No
982-5SJ41407HG40

Siemens

Circuit Breakers MCB 5SJ4 1P 240V 40A SAME PH 14K C-TRIP

Learn More

Datasheet

12In Stock

$110.00

$104.68

$96.53

$77.47

View

Min.: 1
Mult.: 1

Circuit Breakers MCB 5SJ4 1P 277V 40A 10K C-TRIP

5SJ41407HG42
Siemens
1: $126.68
5In Stock

Mfr. Part No.
5SJ41407HG42

Mouser Part No
982-5SJ41407HG42

Siemens

Circuit Breakers MCB 5SJ4 1P 277V 40A 10K C-TRIP

Learn More

Datasheet

5In Stock

$126.68

$107.17

$89.27

$79.11

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 1A 7.5K C-TRIP

5SY41017
Siemens
1: $102.26
20In Stock

Mfr. Part No.
5SY41017

Mouser Part No
982-5SY41017

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 1A 7.5K C-TRIP

Learn More

Datasheet

20In Stock

$102.26

$97.39

$92.25

$64.74

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 1A 7.5K D-TRIP

5SY41018
Siemens
1: $116.76
5In Stock

Mfr. Part No.
5SY41018

Mouser Part No
982-5SY41018

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 1A 7.5K D-TRIP

Learn More

Datasheet

5In Stock

$116.76

$99.14

$87.04

$75.22

$69.82

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K A-TRIP

5SY41025
Siemens
1: $97.53
3In Stock

Mfr. Part No.
5SY41025

Mouser Part No
982-5SY41025

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K A-TRIP

Learn More

Datasheet

3In Stock

$97.53

$84.05

$80.89

$75.04

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K B-TRIP

5SY41026
Siemens
1: $97.53
5In Stock

Mfr. Part No.
5SY41026

Mouser Part No
982-5SY41026

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K B-TRIP

Learn More

Datasheet

5In Stock

$97.53

$84.05

$80.89

$75.04

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K C-TRIP

5SY41027
Siemens
1: $99.25
16In Stock

Mfr. Part No.
5SY41027

Mouser Part No
982-5SY41027

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K C-TRIP

Learn More

Datasheet

16In Stock

$99.25

$89.57

$86.60

$64.74

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K D-TRIP

5SY41028
Siemens
1: $117.74
8In Stock

Mfr. Part No.
5SY41028

Mouser Part No
982-5SY41028

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 2A 7.5K D-TRIP

Learn More

Datasheet

8In Stock

$117.74

$101.37

$83.82

$73.48

View

Min.: 1
Mult.: 1

Circuit Breakers MINIATURE CURCIUT BREAKER, 230/400V 10kA

5SY41037
Siemens
1: $91.05
10In Stock

Mfr. Part No.
5SY41037

Mouser Part No
982-5SY41037

Siemens

Circuit Breakers MINIATURE CURCIUT BREAKER, 230/400V 10kA

Learn More

Datasheet

10In Stock

$91.05

$77.85

$71.90

$63.57

View

Min.: 1
Mult.: 1

Circuit Breakers SUP PTOR 5SY4 1P 240V 4A 7.5K C-TRIP

5SY41047
Siemens
1: $90.55
13In Stock

Mfr. Part No.
5SY41047

Mouser Part No
982-5SY41047

Siemens

Circuit Breakers SUP PTOR 5SY4 1P 240V 4A 7.5K C-TRIP

Learn More

Datasheet

13In Stock

$90.55

$75.43

$73.11

$63.39

View

Min.: 1
Mult.: 1

18 mm Circuit Protection

Types of Circuit Protection

Customer Service Office

Company

Resources

Support