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. 710-0598
Mfr. Part No.1SCA115901R1001
BrandABB
SGD501.82
Each
units
- - 4P - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail -
RS Stock No. 513-5690
Mfr. Part No.3841 3006
BrandSocomec
SGD156.60
Each
units
- - 3P - - - - 10A - 63 A 3 - - -
RS Stock No. 707-6164
Mfr. Part No.2CSM204723R1801
BrandABB
SGD56.49
Each
units
- - 4P - - - 10 x 38 mm - - 32 A 3 - - -
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
SGD2,062.01
Each
units
- - 3P - - - 3 800A Yes 630 A 3 - DIN Rail -
RS Stock No. 781-3800
Mfr. Part No.3631 4004
BrandSocomec
SGD180.31
Each
units
- - 3P + N - - - 14 x 51 mm - Yes 32 A - Shroud DIN Rail -
RS Stock No. 708-1740
Mfr. Part No.GS2DB4
SGD168.33
Each
units
- - 4P - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail -20°C
RS Stock No. 781-3840
Mfr. Part No.3831 6012
BrandSocomec
SGD495.24
Each
units
- - 4P - - - 00 - Yes 125 A - Shroud DIN Rail -
RS Stock No. 726-4901
Mfr. Part No.60KXDC2F
BrandEaton
SGD625.14
Each
units
- - DP - - - SB4 - - 63 A 1 - - -
RS Stock No. 781-3834
Mfr. Part No.3831 3011
BrandSocomec
SGD374.15
Each
units
- - 3P - - - 22 x 58 mm - Yes 125 A - Shroud DIN Rail -
RS Stock No. 608-8040
Mfr. Part No.GS1KD3
SGD710.04
Each
units
- - 3P - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 Screw DIN Rail -
New
RS Stock No. 201-0754
Mfr. Part No.CPD1254
BrandContactum
SGD32.66
Each
units
Closed Fused 4 Incomer CPD - - 125A - 125 A - - - -
RS Stock No. 727-5807
Mfr. Part No.1SCA022750R6660
BrandABB
SGD879.91
Each
units
- - 3P - - - B1-B3 - Yes 250 A 3 Screw DIN Rail -
RS Stock No. 686-7398
Mfr. Part No.1SCA108840R1001
BrandABB
SGD170.67
Each
units
- - 3P - - - A1 - Yes 32 A 3 Screw DIN Rail -
RS Stock No. 726-4737
Mfr. Part No.103GNC
BrandEaton
SGD1,486.39
Each
units
- - 3P + N - - - SB3, SB4, SD5, SO - - 100 A 3 Tunnel - -
RS Stock No. 762-2446
Mfr. Part No.OS20TPN-B
BrandABB
SGD339.78
Each
units
- - 3P + N - - - A1 - - 20 A 3 - Wall Mount -
RS Stock No. 608-7930
Mfr. Part No.GS1DD3
SGD306.52
Each
units
- - 3P - - - 10 x 38 mm - - 20 A dc, 32 A ac 3 Screw DIN Rail -
RS Stock No. 608-7586
Mfr. Part No.GK1EX
SGD314.28
Each
units
- - 3P + N - - - 14 x 51 mm - Yes 50 A 1 Wire Lead DIN Rail -50°C
RS Stock No. 172-3017
Mfr. Part No.36153039
BrandSocomec
SGD2,717.89
Each
units
2NO/2NC, NO/NC - 3 FUSERBLOC - - 2, B1, B2, B3, B4 400A Yes 400 A 3 Cage DIN Rail -
RS Stock No. 184-9087
Mfr. Part No.CPDB1K
BrandContactum
SGD34.26
Each
units
- - - - - - - - - 200 A 3 - - -
RS Stock No. 628-8098
Mfr. Part No.PN2-200
BrandEaton
SGD573.78
1 Box of 1
Box(es)
- - 3P - PN2 - - 200A - 250 A - Screw Panel Mount -
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