Isolator & Switch Disconnectors

Fused switches 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. You can find out more in our complete guide to isolators and switch disconnectors.

Fused switches 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 switches used for?

Fused switches 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 over a non-fused switch 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 switches

Fused switches 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. 819-955
Mfr. Part No.15KXTNC2F
BrandEaton
TWD9,095.00
Each
units
- - 3P - - - - - - - 20 A 3 - -
RS Stock No. 819-949
Mfr. Part No.15KXSC2F
BrandEaton
TWD6,450.00
Each
units
- - SP - - - - - - - 20 A 1 - -
RS Stock No. 513-5713
Mfr. Part No.3841 3016
BrandSocomec
TWD7,589.00
Each
units
- - 3P - - - - - 10A - 160 A 3 - -
RS Stock No. 819-983
Mfr. Part No.60KXSC2F
BrandEaton
TWD12,615.00
Each
units
- - SP - - - - - - - 63 A 1 - -
RS Stock No. 819-961
Mfr. Part No.30KXSC2F
BrandEaton
TWD8,467.00
Each
units
- - SP - - - - - - - 32 A 1 - -
RS Stock No. 676-3227
Mfr. Part No.GS2L3
TWD13,428.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 219-8313
Mfr. Part No.GS2QQ3
TWD39,112.00
Each
units
- Fused 3 TeSys GS2Q - - 2 400A - - - - -
RS Stock No. 726-4838
Mfr. Part No.15KXDC2F
BrandEaton
TWD9,279.00
Each
units
- - DP - - - - SA2 - - 20 A 1 - -
RS Stock No. 182-8463
Mfr. Part No.57035013
BrandSocomec
TWD3,013.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 216-5961
Mfr. Part No.3NP1143-1DA10
BrandSiemens
TWD4,634.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH0, NH1 - - 250A - - -
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. 419-031
Mfr. Part No.KNB50SF4
TWD8,160.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 762-2616
Mfr. Part No.OS125GD03P 1SCA115639R1001
BrandABB
TWD8,597.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 216-5962
Mfr. Part No.3NP1143-1DA11
BrandSiemens
TWD8,709.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH0, NH1 - - 250A - - -
RS Stock No. 708-1769
Mfr. Part No.GS2LB3
TWD10,523.00
Each
units
- - 3P - - - - B1, B2 - Yes - 3 Wire Lead -
New
RS Stock No. 218-3187
Mfr. Part No.3KD3240-0NE20-0
BrandSiemens
TWD6,791.00
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 125A - - -
RS Stock No. 676-3209
Mfr. Part No.GS2F3
TWD6,728.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 726-4901
Mfr. Part No.60KXDC2F
BrandEaton
TWD15,506.00
Each
units
- - DP - - - - SB4 - - 63 A 1 - -
RS Stock No. 762-2455
Mfr. Part No.OS32TPN-A OS32TPN-A
BrandABB
TWD10,012.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3231
Mfr. Part No.3KD4840-0QE10-0
BrandSiemens
TWD48,337.00
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 800A - - -