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
New
RS Stock No. 203-1963
Mfr. Part No.3KD3034-2NE40-0
BrandSiemens
TWD4,673.00
Each
units
- Fused 3 SENTRON 3KD - - Size 2 100A - 100 A - - -
RS Stock No. 608-8040
Mfr. Part No.GS1KD3
TWD16,535.00
Each
units
- - 3P - - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 Screw DIN Rail
New
RS Stock No. 204-1574
Mfr. Part No.P3-63/SE3
BrandEaton
TWD8,024.00
Each
units
3 NO Fused 3 ON-OFF Switch P3 - Enclosed - 80A - 4 kA - - -
New
RS Stock No. 203-2271
Mfr. Part No.5TE8161
BrandSiemens
TWD938.00
Each
units
1 CO - 1 SENTRON 5TE - Enclosed - - - 20 A - - -
RS Stock No. 781-3799
Mfr. Part No.3631 3003
BrandSocomec
TWD2,566.00
Each
units
- - 3P - - - - 10 x 38 mm - Yes 32 A - Shroud DIN Rail
RS Stock No. 762-2629
Mfr. Part No.1SCA115399R1001
BrandABB
TWD11,582.00
Each
units
- - 3P - - - - 00, 000 160A Yes 160 A 3 - DIN Rail
RS Stock No. 819-977
Mfr. Part No.30KXTNC2F
BrandEaton
TWD11,236.00
Each
units
- - 3P - - - - - - - 32 A 3 - -
New
RS Stock No. 204-1584
Mfr. Part No.T0-2-8900/SE1
BrandEaton
TWD4,810.00
Each
units
4 NO Fused 3Poles + N ON-OFF Switch T0 - Enclosed - 20A - 6 kA - - -
RS Stock No. 726-4838
Mfr. Part No.15KXDC2F
BrandEaton
TWD8,395.00
Each
units
- - DP - - - - SA2 - - 20 A 1 - -
RS Stock No. 781-3890
Mfr. Part No.38416024
BrandSocomec
TWD19,796.00
Each
units
- - 4P - - - - B1, B2, B3 - Yes 250 A - Shroud DIN Rail
New
RS Stock No. 202-7147
Mfr. Part No.5SG7631-0KK16
BrandSiemens
TWD1,945.30
Each (In a Pack of 4)
units
- Fused 3 MINIZED 5SG7631 - - D01 16A - 16 A - - -
RS Stock No. 762-2641
Mfr. Part No.1SCA022719R0250
BrandABB
TWD26,858.00
Each
units
- - 3P - - - - 0 → 2 500A Yes 400 A 3 - DIN Rail
RS Stock No. 762-2461
Mfr. Part No.OS125TPN-B
BrandABB
TWD30,960.00
Each
units
- - 3P + N - - - - A2, A3 - - 125 A 3 - Wall Mount
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
TWD46,271.00
Each
units
- - 3P - - - - 3 800A Yes 630 A 3 - DIN Rail
RS Stock No. 781-3881
Mfr. Part No.3841 6006
BrandSocomec
TWD4,127.00
Each
units
- - 4P - - - - A2, A3 - Yes 63 A - Shroud DIN Rail
New
RS Stock No. 204-1562
Mfr. Part No.DMM-160/3/SE4/P-R
BrandEaton
TWD16,471.00
Each
units
3 NO Fused 3 Main Switch, Maintenance Switch, Switch Disconnector DMM - Enclosed - 125A - 13.5 kA - - -
New
RS Stock No. 204-1580
Mfr. Part No.T0-1-102/SE1
BrandEaton
TWD4,609.00
Each
units
2 NO Fused 2 ON-OFF Switch T0 - Enclosed - 20 - 6 - - -
New
RS Stock No. 203-9643
Mfr. Part No.5SG7113
BrandSiemens
TWD1,368.00
Each
units
- Fused 1 MINIZED Minized - - D02 63A - 63 A - - -
RS Stock No. 708-1747
Mfr. Part No.GS2DB3
TWD2,620.00
Each
units
- - 3P - - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail
RS Stock No. 727-5816
Mfr. Part No.1SCA022778R9940
BrandABB
TWD22,009.00
Each
units
- - 4P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail