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. 819-983
Mfr. Part No.60KXSC2F
BrandEaton
SGD544.78
Each
units
- - SP - - - - - - - 63 A 1 - -
New
RS Stock No. 203-1976
Mfr. Part No.3NJ4103-3BF02
BrandSiemens
SGD94.94
Each
units
- Fused 3 SENTRON 3NJ4103 - - NH00, NH000 160A - 160 A - - -
RS Stock No. 781-3881
Mfr. Part No.3841 6006
BrandSocomec
SGD183.07
Each
units
- - 4P - - - - A2, A3 - Yes 63 A - Shroud DIN Rail
RS Stock No. 710-0576
Mfr. Part No.1SCA114610R1001
BrandABB
SGD207.72
Each
units
- - 4P - - - - A2, A3 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 707-6161
Mfr. Part No.2CSM204733R1801
BrandABB
SGD58.45
Each
units
- - 3P + N - - - - 10 x 38 mm - - 32 A 3 - -
RS Stock No. 762-2607
Mfr. Part No.1SCA115189R1001
BrandABB
SGD271.23
Each
units
- - 3P - - - - 000 80A Yes 32 A 3 - DIN Rail
RS Stock No. 762-2455
Mfr. Part No.OS32TPN-B
BrandABB
SGD445.37
Each
units
- - 3P + N - - - - A2 - - 32 A 3 - Wall Mount
RS Stock No. 727-2369
Mfr. Part No.2CMA142423R1000
BrandABB
SGD85.29
Each
units
NO - 3P - - - - - 50A Yes 16 A - Cable -
RS Stock No. 727-5790
Mfr. Part No.1SCA022750R0620
BrandABB
SGD727.36
Each
units
- - 3P + N - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
RS Stock No. 781-3890
Mfr. Part No.38416024
BrandSocomec
SGD878.09
Each
units
- - 4P - - - - B1, B2, B3 - Yes 250 A - Shroud DIN Rail
RS Stock No. 710-0573
Mfr. Part No.1SCA115259R1001
BrandABB
SGD174.22
Each
units
- - 3P - - - - A2, A3 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 707-6158
Mfr. Part No.2CSM200883R1801
BrandABB
SGD26.77
Each
units
- - DP - - - - 10 x 38 mm - - 32 A 1 - -
RS Stock No. 175-3656
Mfr. Part No.A9N15650
SGD31.24
Each
units
2P - 2 Acti 9 STI Double Throw - 8.5 x 31.5 mm 10A - - - Screw DIN Rail
RS Stock No. 781-3828
Mfr. Part No.3831 6006
BrandSocomec
SGD266.06
Each
units
- - 4P - - - - 00C - Yes 63 A - Shroud DIN Rail
RS Stock No. 726-4901
Mfr. Part No.60KXDC2F
BrandEaton
SGD625.14
Each
units
- - DP - - - - SB4 - - 63 A 1 - -
RS Stock No. 819-961
Mfr. Part No.30KXSC2F
BrandEaton
SGD364.35
Each
units
- - SP - - - - - - - 32 A 1 - -
RS Stock No. 708-1740
Mfr. Part No.GS2DB4
SGD168.33
Each
units
- - 4P - - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail
RS Stock No. 815-3691
Mfr. Part No.GS1DDU3
SGD323.15
Each
units
- - 3 - - - - CC - - 30 A - - DIN Rail
RS Stock No. 762-2461
Mfr. Part No.OS125TPN-B
BrandABB
SGD1,379.73
Each
units
- - 3P + N - - - - A2, A3 - - 125 A 3 - Wall Mount
New
RS Stock No. 203-2381
Mfr. Part No.5TE8112
BrandSiemens
SGD46.87
Each
units
2 NO - 1 SENTRON 5TE - Enclosed - - - 20 A - - -
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