Isolator & Switch Disconnectors

Fused switches are devices used to ensure that a circuit is completely powered down in order for it to be serviced or maintained. They isolate a given part of the circuit by cutting off its electrical supply, making it safe for service or maintenance. You can find out more in our complete guide to isolators and switch disconnectors.

Fused switches contain multiple fuses inside the same enclosure so that it is easy to select and isolate a particular part of the circuit. For example, an isolator switch can be used in a substation to physically disconnect any circuit when repairs are being carried out.

What are fused switches used for?

Fused switches protect workers performing maintenance on part of an electrical circuit as well as preventing damage to the circuit itself. The advantage of using a fused switch over a non-fused switch is that it can provide a higher level of safety compared with unfused disconnectors, as the fuse blows in the event of breaches such as short circuits or overcurrent. This makes it certain that that part of the circuit cannot have current flowing through it while being worked on.

Types of fused switches

Fused switches mainly differ depending on the type of fuses they house, the number of poles they have, and the terminal type.


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Description Price Normal State Configuration Fused/Non-Fused Number of Poles Range Series Throw Configuration Enclosed/Not Enclosed Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type
New
RS Stock No. 218-3265
Mfr. Part No.3KF2316-0MF11
BrandSiemens
PHP16,479.37
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 160A - - -
New
RS Stock No. 212-5806
Mfr. Part No.3LD3230-0TK11
BrandSiemens
PHP2,093.86
Each
units
3P - 3 SENTRON 3LD3 Single Throw Enclosed - 32A - 32A - - -
New
RS Stock No. 213-1372
Mfr. Part No.3NP1153-1DA10
BrandSiemens
PHP10,987.58
Each
units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
RS Stock No. 762-2610
Mfr. Part No.OS125GD04N2P 1SCA115877R1001
BrandABB
PHP23,173.19
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3231
Mfr. Part No.3KD4840-0QE10-0
BrandSiemens
PHP79,442.39
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 800A - - -
New
RS Stock No. 218-3269
Mfr. Part No.3KF2416-0LF11
BrandSiemens
PHP20,615.63
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 160A - - -
RS Stock No. 781-3834
Mfr. Part No.3831 3011
BrandSocomec
PHP14,529.55
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 211-4112
Mfr. Part No.3KL5530-1AB01
BrandSiemens
PHP50,307.93
Each
units
- Fused 3 SENTRON 3KL - - 1, 2 - - 250A - - -
New
RS Stock No. 212-5823
Mfr. Part No.3LD3450-0TL11
BrandSiemens
PHP4,553.97
Each
units
- - 4 SENTRON 3LD3 Single Throw Enclosed - 63A - 63A - - -
New
RS Stock No. 218-3249
Mfr. Part No.3KF1303-0MB11
BrandSiemens
PHP10,242.16
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 32A - - -
New
RS Stock No. 212-5782
Mfr. Part No.3LD2144-0TK51
BrandSiemens
PHP4,077.15
Each
units
3P - 3 SENTRON 3LD Single Throw Enclosed Size 2 25A - 25A - - -
New
RS Stock No. 212-5723
Mfr. Part No.3KD3230-2NE20-0
BrandSiemens
PHP10,434.75
Each
units
3P Fused 3 SENTRON 3KD Single Throw Enclosed Size 2 125A - 125A - - -
New
RS Stock No. 212-5793
Mfr. Part No.3LD2545-0TK51
BrandSiemens
PHP6,150.28
Each
units
3P - 3 SENTRON 3LD Single Throw Enclosed Size 3 63A - 63A - - -
New
RS Stock No. 212-5724
Mfr. Part No.3KD3232-2NE10-0
BrandSiemens
PHP12,853.40
Each
units
3P Fused 3 SENTRON 3KD Single Throw Enclosed Size 2 125A - 125A - - -
New
RS Stock No. 218-3207
Mfr. Part No.3KD3640-0PE20-0
BrandSiemens
PHP19,039.91
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 200A - - -
New
RS Stock No. 218-3197
Mfr. Part No.3KD3440-0NE10-0
BrandSiemens
PHP12,474.42
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 160A - - -
New
RS Stock No. 218-3295
Mfr. Part No.3LD2054-1TL51
BrandSiemens
PHP2,672.15
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
New
RS Stock No. 218-3160
Mfr. Part No.3KD1640-2ME20-0
BrandSiemens
PHP4,871.59
Each
units
- Fused 4 SENTRON 3KD1 - - - - - 16A - - -
New
RS Stock No. 212-5778
Mfr. Part No.3LD2030-0TK13
BrandSiemens
PHP1,914.19
Each
units
3P - 3 SENTRON 3LD Single Throw Enclosed Size 1 16A - 16A - - -
RS Stock No. 710-0602
Mfr. Part No.OS160GB04N1P 1SCA115896R1001
BrandABB
PHP24,664.34
Each
units
- - 4P - - - - A2, A3, A4 - Yes 160 A 3 - DIN Rail