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 Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type Minimum Operating Temperature
RS Stock No. 238-4833
Mfr. Part No.0 058 22
BrandLegrand
€17.68
Each
units
- - SP + N - - - 8.5 x 31.5 mm - - 20 A 1 Cage DIN rail -5°C
RS Stock No. 710-0602
Mfr. Part No.1SCA115896R1001
BrandABB
€365.88
Each
units
- - 4P - - - A2, A3, A4 - Yes 160 A 3 - DIN Rail -
RS Stock No. 781-3890
Mfr. Part No.38416024
BrandSocomec
€674.69
Each
units
- - 4P - - - B1, B2, B3 - Yes 250 A - Shroud DIN Rail -
RS Stock No. 781-3881
Mfr. Part No.3841 6006
BrandSocomec
€140.66
Each
units
- - 4P - - - A2, A3 - Yes 63 A - Shroud DIN Rail -
RS Stock No. 608-8006
Mfr. Part No.GS1JD3
€235.33
Each
units
- - 3P - - - 22 x 58 mm - Yes 100 A ac, 100 A dc 3 Screw DIN Rail -
RS Stock No. 762-2641
Mfr. Part No.1SCA022719R0250
BrandABB
€699.44
Each
units
- - 3P - - - 0 → 2 500A Yes 400 A 3 - DIN Rail -
RS Stock No. 707-6168
Mfr. Part No.2CSM204713R1801
BrandABB
€10.00
Each
units
- - SP - - - 10 x 38 mm - - 32 A 1 - - -
RS Stock No. 172-3018
Mfr. Part No.36153016
BrandSocomec
€751.86
Each
units
2NO/2NC, NO/NC - 3 FUSERBLOC - - 00 160A Yes 160 A 3 Cage DIN Rail -
RS Stock No. 781-3787
Mfr. Part No.3631 4002
BrandSocomec
€94.26
Each
units
- - 3P + N - - - 10 x 38 mm - Yes 25 A - Shroud DIN Rail -
RS Stock No. 762-2468
Mfr. Part No.OS200TPN-B
BrandABB
€1,090.87
Each
units
- - 3P + N - - - B1, B2 - - 200 A 3 - Wall Mount -
RS Stock No. 122-0516
Mfr. Part No.38313039
BrandSocomec
€992.49
Each
units
- - 3 - FUSERBLOC - BS88 400A Yes - 3 Screw DIN Rail -
RS Stock No. 708-1747
Mfr. Part No.GS2DB3
€49.10
Each
units
- - 3P - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail -20°C
RS Stock No. 708-1753
Mfr. Part No.GS2GB4
€116.01
Each
units
- - 4P - - - A2, A3 - Yes 40 A dc, 63 A ac 3 Wire Lead DIN Rail -20°C
RS Stock No. 499-7201
Mfr. Part No.T0-2-8900/E + EZ-P1
BrandEaton
€20.70
Each
units
- - 4P - - - gG/gL 20A - 20 A - - Panel Mount -
RS Stock No. 534-5178
Mfr. Part No.MGFA1003C
€666.75
Each
units
- - 3P + N - - - A2, A3, A4, CEO100 - - 100 A - - - -
RS Stock No. 714-1928
Mfr. Part No.SDF41G00633N
€382.58
Each
units
- - 3P + N - - - - - Yes 63 A 3 - - -
RS Stock No. 727-5787
Mfr. Part No.1SCA022709R9330
BrandABB
€384.38
Each
units
- - 3P - - - B1-B2 - Yes 200 A 3 Screw DIN Rail -
RS Stock No. 781-3793
Mfr. Part No.3631 4003
BrandSocomec
€98.74
Each
units
- - 3P + N - - - 10 x 38 mm - Yes 32 A - Shroud DIN Rail -
RS Stock No. 726-4901
Mfr. Part No.60KXDC2F
BrandEaton
€365.31
Each
units
- - DP - - - SB4 - - 63 A 1 - - -
RS Stock No. 781-3834
Mfr. Part No.3831 3011
BrandSocomec
€242.72
Each
units
- - 3P - - - 22 x 58 mm - Yes 125 A - Shroud DIN Rail -
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