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. 781-3816
Mfr. Part No.3831 6005
BrandSocomec
TWD5,522.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5739
Mfr. Part No.3KD5030-0RE20-0
BrandSiemens
TWD68,534.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1354
Mfr. Part No.3LD2044-1TL51
BrandSiemens
TWD2,124.00
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
New
RS Stock No. 216-5960
Mfr. Part No.3NP1143-1BC10
BrandSiemens
TWD7,670.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH0, NH1 - - 250A - - -
New
RS Stock No. 218-3259
Mfr. Part No.3KF1406-0LB11
BrandSiemens
TWD9,867.00
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 63A - - -
RS Stock No. 181-2586
Mfr. Part No.A9N15646
TWD806.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3299
Mfr. Part No.3LD2103-2EP51
BrandSiemens
TWD2,117.00
Each
units
- Fused 4 SENTRON 3LD - - - - - 25A - - -
New
RS Stock No. 212-5728
Mfr. Part No.3KD3630-0PE20-0
BrandSiemens
TWD9,338.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
TWD1,591.00
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
New
RS Stock No. 212-5725
Mfr. Part No.3KD3430-2NE20-0
BrandSiemens
TWD6,813.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 781-3819
Mfr. Part No.3631 5004
BrandSocomec
TWD4,868.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 204-1574
Mfr. Part No.P3-63/SE3
BrandEaton
TWD8,421.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 727-5838
Mfr. Part No.OS400B03P 1SCA022719R0840
BrandABB
TWD28,243.00
Each
units
- - 3P - - - - B1-B4 - Yes 400 A 3 Screw DIN Rail
New
RS Stock No. 212-5716
Mfr. Part No.3KD2830-0NE10-0
BrandSiemens
TWD3,230.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3212
Mfr. Part No.3KD3840-0PE20-0
BrandSiemens
TWD14,980.00
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 250A - - -
New
RS Stock No. 218-3178
Mfr. Part No.3KD3040-0NE10-0
BrandSiemens
TWD5,513.00
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3279
Mfr. Part No.3KF5363-0MF11
BrandSiemens
TWD50,334.00
Each
units
- Fused 3 SENTRON 3KF - - NH2, NH3 - - 630A - - -
New
RS Stock No. 218-3263
Mfr. Part No.3KF2312-2LF11
BrandSiemens
TWD11,145.00
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 125A - - -
New
RS Stock No. 213-1353
Mfr. Part No.3LD2013-1TL53
BrandSiemens
TWD2,317.00
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
RS Stock No. 204-1572
Mfr. Part No.P1-32/SE1/SVB
BrandEaton
TWD6,565.00
Each
units
- - - - - - - - - - - - - -