Isolator & Switch Disconnectors

Fused switch disconnectors 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.

Fused switch disconnectors 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 switch disconnectors used for?

Fused switch disconnectors 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 disconnector over a non-fused switch disconnector one 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 switch disconnectors

Fused switch disconnectors 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. 218-3235
Mfr. Part No.3KD5240-0RE10-0
BrandSiemens
MYR16,165.04
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1250A - - -
New
RS Stock No. 218-3259
Mfr. Part No.3KF1406-0LB11
BrandSiemens
MYR1,300.58
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 63A - - -
New
RS Stock No. 213-1367
Mfr. Part No.3NP1133-1CA11
BrandSiemens
MYR758.23
Each
units
- Fused 3 SENTRON 3NP11 - - NH00, NH000 - - 160A - - -
New
RS Stock No. 218-3199
Mfr. Part No.3KD3440-2NE10-0
BrandSiemens
MYR1,121.55
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 160A - - -
New
RS Stock No. 218-3216
Mfr. Part No.3KD4040-0PE20-0
BrandSiemens
MYR2,269.42
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 315A - - -
New
RS Stock No. 218-3256
Mfr. Part No.3KF1308-2LB11
BrandSiemens
MYR1,379.56
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 80A - - -
New
RS Stock No. 218-3200
Mfr. Part No.3KD3440-2NE20-0
BrandSiemens
MYR1,121.55
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 160A - - -
RS Stock No. 820-012
Mfr. Part No.100KXTNC2F
BrandEaton
MYR5,513.80
Each
units
- - 3P - - - - - - - 100 A 3 - -
New
RS Stock No. 218-3255
Mfr. Part No.3KF1308-0MB11
BrandSiemens
MYR1,168.94
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 80A - - -
New
RS Stock No. 213-1372
Mfr. Part No.3NP1153-1DA10
BrandSiemens
MYR837.21
Each
units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
New
RS Stock No. 213-1371
Mfr. Part No.3NP1153-1BC10
BrandSiemens
MYR1,553.47
Each
units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
RS Stock No. 726-4917
Mfr. Part No.60KXTNC2F
BrandEaton
MYR3,147.47
Each
units
- - 3P + N - - - - SB4 - - 63 A 3 - -
New
RS Stock No. 209-1326
Mfr. Part No.A9N15636
MYR56.83
Each
units
- Fused 1P Acti 9 STI - - 10.3 x 38mm 2A - 25A - - -
New
RS Stock No. 216-5955
Mfr. Part No.3LD2305-1TL11
BrandSiemens
MYR2,132.52
Each
units
- Fused 4 SENTRON 3LD - - - - - 160A - - -
New
RS Stock No. 218-3217
Mfr. Part No.3KD4042-0PE10-0
BrandSiemens
MYR2,501.11
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 315A - - -
New
RS Stock No. 212-5715
Mfr. Part No.3KD2230-2ME10-0
BrandSiemens
MYR361.21
Each
units
- - - - - - - - - - - - - -
RS Stock No. 202-7056
Mfr. Part No.5SG7611-0KK10
BrandSiemens
MYR96.618
Each (In a Pack of 12)
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5737
Mfr. Part No.3KD4832-0QE10-0
BrandSiemens
MYR5,370.80
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3190
Mfr. Part No.3KD3242-0NE10-0
BrandSiemens
MYR1,084.69
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 125A - - -
RS Stock No. 727-5816
Mfr. Part No.OS250B22N2P 1SCA022778R9940
BrandABB
MYR3,264.71
Each
units
- - 4P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail