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. 781-3897
Mfr. Part No.38416021
BrandSocomec
TWD12,792.00
Each
units
- - 4P - - - - B1, B2 - Yes 200 A - Shroud DIN Rail
RS Stock No. 710-0595
Mfr. Part No.1SCA115634R1001
BrandABB
TWD9,709.00
Each
units
- - 3P - - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail
RS Stock No. 727-2372
Mfr. Part No.2CMA142422R1000
BrandABB
TWD4,592.00
Each
units
NO - 6P - - - - - 50A Yes 25 A - Cable -
RS Stock No. 727-2375
Mfr. Part No.2CMA142420R1000
BrandABB
TWD2,134.00
Each
units
NO - 3P - - - - - 50A Yes 25 A - Cable -
RS Stock No. 513-5741
Mfr. Part No.3841 3039
BrandSocomec
TWD22,799.00
Each
units
- - 3P - - - - - 10A - 400 A 3 - -
New
RS Stock No. 204-1583
Mfr. Part No.T0-1-8200/SE1/SVB
BrandEaton
TWD5,301.00
Each
units
1 NO Fused 1 Main Switch, Maintenance Switch, Switch Disconnector T0 - Enclosed - 20A - 6 kA - - -
RS Stock No. 762-2610
Mfr. Part No.1SCA115877R1001
BrandABB
TWD12,078.00
Each
units
- - 4P - - - - 00, 000 160A Yes 125 A 3 - DIN Rail
RS Stock No. 534-5112
Mfr. Part No.MGFA0201C
TWD5,576.00
Each
units
- - SP + N - - - - A1, A2, NITD20 - - 20 A - - -
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. 708-1769
Mfr. Part No.GS2LB3
TWD10,300.00
Each
units
- - 3P - - - - B1, B2 - Yes 125 A dc, 160 A ac 3 Wire Lead DIN Rail
RS Stock No. 238-4833
Mfr. Part No.0 058 22
BrandLegrand
TWD611.00
Each
units
- - SP + N - - - - 8.5 x 31.5 mm - - 20 A 1 Cage DIN rail
RS Stock No. 179-9648
Mfr. Part No.38313016
BrandSocomec
TWD11,481.00
Each
units
3P - 3 FUSERBLOC - - - - 160A Yes 160 A - - DIN Rail
RS Stock No. 710-0586
Mfr. Part No.1SCA114614R1001
BrandABB
TWD8,868.00
Each
units
- - 4P - - - - A2, A3, A4 - Yes 100 A 3 - 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. 726-4838
Mfr. Part No.15KXDC2F
BrandEaton
TWD8,395.00
Each
units
- - DP - - - - SA2 - - 20 A 1 - -
RS Stock No. 398-5241
Mfr. Part No.AAE003-251/Z038-01
BrandEICHOFF
TWD230.00
Each
units
- - - - - - - - - - - - - Panel Mount
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. 179-9647
Mfr. Part No.36153010
BrandSocomec
TWD8,314.00
Each
units
3P - 3 FUSERBLOC - - - 22 x 58 mm 100A Yes 100 A - - DIN Rail
New
RS Stock No. 204-1561
Mfr. Part No.DMM-125/3/SE4/P-R
BrandEaton
TWD16,003.00
Each
units
3 NO Fused 3 Main Switch, Maintenance Switch, Switch Disconnector DMM - Enclosed - 125A - 13.7 kA - - -
RS Stock No. 707-6161
Mfr. Part No.2CSM204733R1801
BrandABB
TWD1,311.00
Each
units
- - 3P + N - - - - 10 x 38 mm - - 32 A 3 - -