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. 819-977
Mfr. Part No.30KXTNC2F
BrandEaton
£263.80
Each
Units
- - 3P - - - - - - - 32 A 3 - -
RS Stock No. 686-7385
Mfr. Part No.OS20FB12A1 1SCA108790R1001
BrandABB
£87.87
Each
Units
- - 3P - - - - A1 - Yes 20 A - Screw DIN Rail
RS Stock No. 762-2629
Mfr. Part No.OS160GD03P 1SCA115399R1001
BrandABB
£270.45
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 686-7398
Mfr. Part No.OS32FB12A1 1SCA108840R1001
BrandABB
£95.68
Each
Units
- - 3P - - - - A1 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 513-2073
Mfr. Part No.3641 3000
BrandSocomec
£40.09
Each
Units
- - 3P - - - - A1 - Yes 20 A 3 Shroud -
RS Stock No. 819-955
Mfr. Part No.15KXTNC2F
BrandEaton
£208.54
Each
Units
- - 3P - - - - - - - 20 A 3 - -
RS Stock No. 676-3233
Mfr. Part No.GS2S3
£1,018.97
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 512-9459
Mfr. Part No.OS100GB12P 1SCA114586R1001
BrandABB
£184.43
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 535-0912
Mfr. Part No.MGFA0633C
£404.00
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 710-0570
Mfr. Part No.OS63GB03P 1SCA115235R1001
BrandABB
£145.70
Each
Units
- - 3P - - - - A2, A3 - Yes 63 A 3 Screw DIN Rail
RS Stock No. 707-6152
Mfr. Part No.2CSM204753R1801 E 93/32
BrandABB
£23.57
Each
Units
- - 3P - - - - 10 x 38 mm - - 32 A 3 - -
RS Stock No. 820-012
Mfr. Part No.100KXTNC2F
BrandEaton
£767.56
Each
Units
- - 3P - - - - - - - 100 A 3 - -
RS Stock No. 727-5787
Mfr. Part No.OS200B03P 1SCA022709R9330
BrandABB
£344.66
Each
Units
- - 3P - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
RS Stock No. 247-4065
Mfr. Part No.DTL400KIT
£264.29
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 819-983
Mfr. Part No.60KXSC2F
BrandEaton
£308.02
Each
Units
- - SP - - - - - - - 63 A 1 - -
RS Stock No. 781-3847
Mfr. Part No.3831 3012
BrandSocomec
£186.71
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 781-3783
Mfr. Part No.3631 3002
BrandSocomec
£55.87
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 726-4731
Mfr. Part No.103GNL
BrandEaton
£758.41
Each
Units
- - 3P + N - - - - - - - 100A 3 - -
RS Stock No. 419-031
Mfr. Part No.KNB50SF4
£180.49
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 534-5178
Mfr. Part No.MGFA1003C
£697.00
Each
Units
- - - - - - - - - - - - - -