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
RS Stock No. 781-3844
Mfr. Part No.3831 3015
BrandSocomec
SGD440.14
Each
units
- - - - - - - - - - - - - -
RS Stock No. 204-1572
Mfr. Part No.P1-32/SE1/SVB
BrandEaton
SGD302.20
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3278
Mfr. Part No.3KF4440-0MF11
BrandSiemens
SGD1,416.37
Each
units
- Fused 4 SENTRON 3KF - - NH1, NH2 - - 400A - - -
RS Stock No. 727-5787
Mfr. Part No.OS200B03P 1SCA022709R9330
BrandABB
SGD667.62
Each
units
- - 3P - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
New
RS Stock No. 218-3207
Mfr. Part No.3KD3640-0PE20-0
BrandSiemens
SGD497.88
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 200A - - -
New
RS Stock No. 212-5727
Mfr. Part No.3KD3630-0NE20-0
BrandSiemens
SGD341.61
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5811
Mfr. Part No.3LD3250-0TL11
BrandSiemens
SGD82.21
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5718
Mfr. Part No.3KD2830-2NE20-0
BrandSiemens
SGD164.41
Each
units
- - - - - - - - - - - - - -
RS Stock No. 608-8006
Mfr. Part No.GS1JD3
SGD694.74
Each
units
- - - - - - - - - - - - - -
RS Stock No. 204-1569
Mfr. Part No.P1-32/SE1
BrandEaton
SGD267.17
Each
units
- - - - - - - - - - - - - -
RS Stock No. 238-4833
Mfr. Part No.0 058 22
BrandLegrand
SGD30.40
Each
units
- - SP + N - - - - 8.5 x 31.5 mm - - 20 A 1 Cage DIN rail
RS Stock No. 781-3819
Mfr. Part No.3631 5004
BrandSocomec
SGD224.08
Each
units
- - - - - - - - - - - - - -
RS Stock No. 499-7201
Mfr. Part No.78640548 & T0-2-8900/E/EZ-P1(RS499-7201)
BrandEaton
SGD41.95
Each
units
- - - - - - - - - - - - - -
RS Stock No. 204-1576
Mfr. Part No.P3-100/SE3
BrandEaton
SGD474.68
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3176
Mfr. Part No.3KD3030-0NE20-0
BrandSiemens
SGD192.28
Each
units
- Fused 3 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3304
Mfr. Part No.3LD2766-1GP53
BrandSiemens
SGD394.87
Each
units
- Fused 3 SENTRON 3LD - - - - - 100A - - -
New
RS Stock No. 218-3195
Mfr. Part No.3KD3432-0NE10-0
BrandSiemens
SGD321.04
Each
units
- Fused 3 SENTRON 3KD3 - - - - - 160A - - -
New
RS Stock No. 218-3303
Mfr. Part No.3LD2766-1GP51
BrandSiemens
SGD394.87
Each
units
- Fused 3 SENTRON 3LD - - - - - 100A - - -
New
RS Stock No. 218-3256
Mfr. Part No.3KF1308-2LB11
BrandSiemens
SGD449.81
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 80A - - -
RS Stock No. 820-012
Mfr. Part No.100KXTNC2F
BrandEaton
SGD1,605.71
Each
units
- - 3P - - - - - - - 100 A 3 - -