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
New
RS Stock No. 212-0116
Mfr. Part No.A9E18072
MYR163.23
Each
units
- - 2 Acti 9 ISSW - - - - - 20A - - -
New
RS Stock No. 218-3293
Mfr. Part No.3LD2030-1TL13
BrandSiemens
MYR184.82
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
RS Stock No. 209-1326
Mfr. Part No.A9N15636
MYR56.83
Each
units
- Fused 1P Acti 9 STI - - 10.3 x 38mm 2A - 25A - - -
RS Stock No. 184-9087
Mfr. Part No.CPDB1K
BrandContactum
MYR105.76
Each
units
- - - - - - - - - - 200 A 3 - -
RS Stock No. 707-6164
Mfr. Part No.2CSM204723R1801 E 94/32
BrandABB
MYR179.48
Each
units
- - 4P - - - - 10 x 38 mm - - 32 A 3 - -
New
RS Stock No. 218-3232
Mfr. Part No.3KD4840-0QE20-0
BrandSiemens
MYR6,371.24
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 800A - - -
RS Stock No. 727-5838
Mfr. Part No.OS400B03P 1SCA022719R0840
BrandABB
MYR3,763.69
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 219-8311
Mfr. Part No.DF22N
MYR131.11
Each (In a Pack of 6)
units
- Fused 1 TeSys DF22 - - 22 x 58mm 125A - - - - -
New
RS Stock No. 218-3235
Mfr. Part No.3KD5240-0RE10-0
BrandSiemens
MYR18,993.92
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1250A - - -
New
RS Stock No. 212-5712
Mfr. Part No.3KD1630-2ME20-0
BrandSiemens
MYR312.24
Each
units
3P Fused 3 SENTRON 3KD Single Throw Enclosed Size 1 16A - 16A - - -
New
RS Stock No. 212-5822
Mfr. Part No.3LD3450-0TK11
BrandSiemens
MYR297.50
Each
units
3P - 3 SENTRON 3LD3 Single Throw Enclosed - 63A - 63A - - -
New
RS Stock No. 212-0288
Mfr. Part No.VBF2GE
MYR334.31
Each
units
- - 3 TeSys VBF - Enclosed - 50A - 32A - - -
RS Stock No. 708-1747
Mfr. Part No.GS2DB3
MYR420.16
Each
units
- - 3P - - - - A1 - Yes - 3 Wire Lead -
RS Stock No. 204-1562
Mfr. Part No.DMM-160/3/SE4/P-R
BrandEaton
MYR2,736.94
Each
units
- - - - - - - - - - - - - -
RS Stock No. 710-0595
Mfr. Part No.OS125GB03P 1SCA115634R1001
BrandABB
MYR1,440.25
Each
units
- - 3P - - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail
RS Stock No. 122-0516
Mfr. Part No.38313039
BrandSocomec
MYR4,464.17
Each
units
- - 3 - FUSERBLOC - - BS88 400A Yes - 3 Screw DIN Rail
New
RS Stock No. 218-3172
Mfr. Part No.3KD2840-2NE10-0
BrandSiemens
MYR595.00
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
RS Stock No. 781-3825
Mfr. Part No.3831 3006
BrandSocomec
MYR986.07
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5716
Mfr. Part No.3KD2830-0NE10-0
BrandSiemens
MYR424.40
Each
units
3P Fused 3 SENTRON 3KD Single Throw Enclosed Size 2 80A - 80A - - -
RS Stock No. 181-2587
Mfr. Part No.A9N15651
MYR198.41
Each
units
- - - Canalis - - - - - - 63A - - -