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. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
TWD1,591.00
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
RS Stock No. 727-5790
Mfr. Part No.OS200B03N3P 1SCA022750R0620
BrandABB
TWD16,351.00
Each
units
- - 3P + N - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
New
RS Stock No. 218-3296
Mfr. Part No.3LD2054-1TL53
BrandSiemens
TWD1,626.00
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
New
RS Stock No. 213-1363
Mfr. Part No.3NP1123-1BC20
BrandSiemens
TWD2,248.00
Each
units
- Fused 3 SENTRON 3NP11 - - - - - 160A - - -
New
RS Stock No. 218-3159
Mfr. Part No.3KD1640-2ME10-0
BrandSiemens
TWD2,964.00
Each
units
- Fused 4 SENTRON 3KD1 - - - - - 16A - - -
New
RS Stock No. 212-5791
Mfr. Part No.3LD2530-0TK11
BrandSiemens
TWD2,260.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1379
Mfr. Part No.3LD2305-0TK13
BrandSiemens
TWD13,306.00
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 5 160A - 160A - - -
New
RS Stock No. 218-3247
Mfr. Part No.3KF1303-0LB11
BrandSiemens
TWD6,232.00
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 32A - - -
RS Stock No. 762-2641
Mfr. Part No.OS400D03P 1SCA022719R0250
BrandABB
TWD23,782.00
Each
units
- - 3P - - - - 0 → 2 500A Yes 400 A 3 - DIN Rail
New
RS Stock No. 212-5725
Mfr. Part No.3KD3430-2NE20-0
BrandSiemens
TWD6,813.00
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. 212-5811
Mfr. Part No.3LD3250-0TL11
BrandSiemens
TWD1,804.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3183
Mfr. Part No.3KD3042-0NE10-0
BrandSiemens
TWD6,911.00
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3173
Mfr. Part No.3KD2840-2NE20-0
BrandSiemens
TWD4,514.00
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
RS Stock No. 608-7946
Mfr. Part No.GS1DD4
TWD8,830.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5794
Mfr. Part No.3LD2545-0TK53
BrandSiemens
TWD3,567.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 781-3881
Mfr. Part No.3841 6006
BrandSocomec
TWD4,288.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-1994
Mfr. Part No.3NP1123-1CA20
BrandSiemens
TWD1,515.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3186
Mfr. Part No.3KD3240-0NE10-0
BrandSiemens
TWD6,791.00
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 125A - - -
RS Stock No. 179-9648
Mfr. Part No.38313016
BrandSocomec
TWD11,927.00
Each
units
3P - 3 FUSERBLOC - - - - 160A Yes 160 A - - DIN Rail